id sid tid token lemma pos ispiv-67 1 1 14th 14th ADJ ispiv-67 1 2 international international ADJ ispiv-67 1 3 symposium symposium NOUN ispiv-67 1 4 on on ADP ispiv-67 1 5 particle particle NOUN ispiv-67 1 6 image image NOUN ispiv-67 1 7 velocimetry velocimetry NOUN ispiv-67 1 8 – – PUNCT ispiv-67 1 9 ispiv ispiv NOUN ispiv-67 1 10 2021 2021 NUM ispiv-67 1 11 august august PROPN ispiv-67 1 12 1–5 1–5 NUM ispiv-67 1 13 , , PUNCT ispiv-67 1 14 2021 2021 NUM ispiv-67 1 15 on on ADP ispiv-67 1 16 the the DET ispiv-67 1 17 challenges challenge NOUN ispiv-67 1 18 of of ADP ispiv-67 1 19 precise precise ADJ ispiv-67 1 20 velocity velocity NOUN ispiv-67 1 21 measurements measurement NOUN ispiv-67 1 22 in in ADP ispiv-67 1 23 vertical vertical ADJ ispiv-67 1 24 convective convective ADJ ispiv-67 1 25 wall wall NOUN ispiv-67 1 26 jets jet NOUN ispiv-67 1 27 h. h. PROPN ispiv-67 1 28 otto∗ otto∗ PROPN ispiv-67 1 29 , , PUNCT ispiv-67 1 30 c. c. PROPN ispiv-67 1 31 cierpka cierpka PROPN ispiv-67 1 32 technische technische PROPN ispiv-67 1 33 universität universität PROPN ispiv-67 1 34 ilmenau ilmenau PROPN ispiv-67 1 35 , , PUNCT ispiv-67 1 36 institute institute NOUN ispiv-67 1 37 of of ADP ispiv-67 1 38 thermodynamics thermodynamic NOUN ispiv-67 1 39 and and CCONJ ispiv-67 1 40 fluid fluid ADJ ispiv-67 1 41 mechanics mechanic NOUN ispiv-67 1 42 , , PUNCT ispiv-67 1 43 ilmenau ilmenau PROPN ispiv-67 1 44 , , PUNCT ispiv-67 1 45 germany germany PROPN ispiv-67 1 46 ∗ ∗ NOUN ispiv-67 1 47 henning.otto@tu-ilmenau.de henning.otto@tu-ilmenau.de PROPN ispiv-67 2 1 abstract abstract NOUN ispiv-67 2 2 for for ADP ispiv-67 2 3 the the DET ispiv-67 2 4 transition transition NOUN ispiv-67 2 5 of of ADP ispiv-67 2 6 our our PRON ispiv-67 2 7 energy energy NOUN ispiv-67 2 8 supply supply NOUN ispiv-67 2 9 towards towards ADP ispiv-67 2 10 a a DET ispiv-67 2 11 higher high ADJ ispiv-67 2 12 share share NOUN ispiv-67 2 13 of of ADP ispiv-67 2 14 renewables renewable NOUN ispiv-67 2 15 , , PUNCT ispiv-67 2 16 thermal thermal ADJ ispiv-67 2 17 energy energy NOUN ispiv-67 2 18 storage storage NOUN ispiv-67 2 19 ( ( PUNCT ispiv-67 2 20 tes tes NOUN ispiv-67 2 21 ) ) PUNCT ispiv-67 2 22 systems system NOUN ispiv-67 2 23 are be AUX ispiv-67 2 24 , , PUNCT ispiv-67 2 25 besides besides SCONJ ispiv-67 2 26 electric electric ADJ ispiv-67 2 27 batteries battery NOUN ispiv-67 2 28 and and CCONJ ispiv-67 2 29 chemical chemical NOUN ispiv-67 2 30 energy energy NOUN ispiv-67 2 31 storage storage NOUN ispiv-67 2 32 systems system NOUN ispiv-67 2 33 , , PUNCT ispiv-67 2 34 one one NUM ispiv-67 2 35 promising promising ADJ ispiv-67 2 36 solution solution NOUN ispiv-67 2 37 to to PART ispiv-67 2 38 overcome overcome VERB ispiv-67 2 39 the the DET ispiv-67 2 40 volatile volatile ADJ ispiv-67 2 41 nature nature NOUN ispiv-67 2 42 of of ADP ispiv-67 2 43 renewable renewable ADJ ispiv-67 2 44 energy energy NOUN ispiv-67 2 45 sources source NOUN ispiv-67 2 46 . . PUNCT ispiv-67 3 1 for for ADP ispiv-67 3 2 the the DET ispiv-67 3 3 most most ADV ispiv-67 3 4 efficient efficient ADJ ispiv-67 3 5 operation operation NOUN ispiv-67 3 6 , , PUNCT ispiv-67 3 7 the the DET ispiv-67 3 8 liquid liquid ADJ ispiv-67 3 9 storage storage NOUN ispiv-67 3 10 material material NOUN ispiv-67 3 11 in in ADP ispiv-67 3 12 the the DET ispiv-67 3 13 tank tank NOUN ispiv-67 3 14 should should AUX ispiv-67 3 15 be be AUX ispiv-67 3 16 stratified stratify VERB ispiv-67 3 17 by by ADP ispiv-67 3 18 its its PRON ispiv-67 3 19 temperature temperature NOUN ispiv-67 3 20 - - PUNCT ispiv-67 3 21 dependent dependent ADJ ispiv-67 3 22 density density NOUN ispiv-67 3 23 . . PUNCT ispiv-67 4 1 as as ADP ispiv-67 4 2 a a DET ispiv-67 4 3 result result NOUN ispiv-67 4 4 , , PUNCT ispiv-67 4 5 the the DET ispiv-67 4 6 cold cold ADJ ispiv-67 4 7 fluid fluid NOUN ispiv-67 4 8 remains remain VERB ispiv-67 4 9 at at ADP ispiv-67 4 10 the the DET ispiv-67 4 11 bottom bottom NOUN ispiv-67 4 12 , , PUNCT ispiv-67 4 13 and and CCONJ ispiv-67 4 14 the the DET ispiv-67 4 15 heated heated ADJ ispiv-67 4 16 fluid fluid NOUN ispiv-67 4 17 rises rise VERB ispiv-67 4 18 to to ADP ispiv-67 4 19 the the DET ispiv-67 4 20 top top NOUN ispiv-67 4 21 ( ( PUNCT ispiv-67 4 22 alva alva PROPN ispiv-67 4 23 et et PROPN ispiv-67 4 24 al al PROPN ispiv-67 4 25 . . PROPN ispiv-67 5 1 ( ( PUNCT ispiv-67 5 2 2018 2018 NUM ispiv-67 5 3 ) ) PUNCT ispiv-67 5 4 ) ) PUNCT ispiv-67 5 5 . . PUNCT ispiv-67 6 1 typically typically ADV ispiv-67 6 2 steel steel NOUN ispiv-67 6 3 tanks tank NOUN ispiv-67 6 4 are be AUX ispiv-67 6 5 used use VERB ispiv-67 6 6 for for ADP ispiv-67 6 7 tes tes NOUN ispiv-67 6 8 , , PUNCT ispiv-67 6 9 and and CCONJ ispiv-67 6 10 thus thus ADV ispiv-67 6 11 , , PUNCT ispiv-67 6 12 the the DET ispiv-67 6 13 wall wall NOUN ispiv-67 6 14 material material PROPN ispiv-67 6 15 has have VERB ispiv-67 6 16 a a DET ispiv-67 6 17 thermal thermal ADJ ispiv-67 6 18 diffusivity diffusivity NOUN ispiv-67 6 19 that that PRON ispiv-67 6 20 is be AUX ispiv-67 6 21 one one NUM ispiv-67 6 22 to to ADP ispiv-67 6 23 two two NUM ispiv-67 6 24 orders order NOUN ispiv-67 6 25 of of ADP ispiv-67 6 26 magnitude magnitude NOUN ispiv-67 6 27 higher high ADJ ispiv-67 6 28 than than ADP ispiv-67 6 29 that that PRON ispiv-67 6 30 of of ADP ispiv-67 6 31 the the DET ispiv-67 6 32 storage storage NOUN ispiv-67 6 33 fluid fluid NOUN ispiv-67 6 34 . . PUNCT ispiv-67 7 1 consequently consequently ADV ispiv-67 7 2 , , PUNCT ispiv-67 7 3 the the DET ispiv-67 7 4 tank tank NOUN ispiv-67 7 5 ’s ’s PART ispiv-67 7 6 sidewalls sidewall VERB ispiv-67 7 7 work work VERB ispiv-67 7 8 as as ADP ispiv-67 7 9 a a DET ispiv-67 7 10 thermal thermal ADJ ispiv-67 7 11 bridge bridge NOUN ispiv-67 7 12 between between ADP ispiv-67 7 13 the the DET ispiv-67 7 14 stratified stratified ADJ ispiv-67 7 15 layers layer NOUN ispiv-67 7 16 . . PUNCT ispiv-67 8 1 in in ADP ispiv-67 8 2 recent recent ADJ ispiv-67 8 3 studies study NOUN ispiv-67 8 4 , , PUNCT ispiv-67 8 5 the the DET ispiv-67 8 6 authors author NOUN ispiv-67 8 7 have have AUX ispiv-67 8 8 shown show VERB ispiv-67 8 9 that that SCONJ ispiv-67 8 10 the the DET ispiv-67 8 11 resulting result VERB ispiv-67 8 12 heat heat NOUN ispiv-67 8 13 flux flux NOUN ispiv-67 8 14 induces induce VERB ispiv-67 8 15 two two NUM ispiv-67 8 16 counterdirected counterdirected ADJ ispiv-67 8 17 , , PUNCT ispiv-67 8 18 convective convective ADJ ispiv-67 8 19 wall wall NOUN ispiv-67 8 20 jets jet NOUN ispiv-67 8 21 near near ADP ispiv-67 8 22 the the DET ispiv-67 8 23 sidewalls sidewall NOUN ispiv-67 8 24 of of ADP ispiv-67 8 25 the the DET ispiv-67 8 26 tank tank NOUN ispiv-67 8 27 , , PUNCT ispiv-67 8 28 which which PRON ispiv-67 8 29 increase increase VERB ispiv-67 8 30 mixing mixing NOUN ispiv-67 8 31 of of ADP ispiv-67 8 32 the the DET ispiv-67 8 33 stratification stratification NOUN ispiv-67 8 34 and and CCONJ ispiv-67 8 35 thus thus ADV ispiv-67 8 36 lowers lower VERB ispiv-67 8 37 the the DET ispiv-67 8 38 exergy exergy NOUN ispiv-67 8 39 content content NOUN ispiv-67 8 40 and and CCONJ ispiv-67 8 41 the the DET ispiv-67 8 42 storage storage NOUN ispiv-67 8 43 efficiency efficiency NOUN ispiv-67 8 44 ( ( PUNCT ispiv-67 8 45 otto otto PROPN ispiv-67 8 46 et et PROPN ispiv-67 8 47 al al PROPN ispiv-67 8 48 . . PROPN ispiv-67 9 1 ( ( PUNCT ispiv-67 9 2 2019 2019 NUM ispiv-67 9 3 , , PUNCT ispiv-67 9 4 2020 2020 NUM ispiv-67 9 5 ) ) PUNCT ispiv-67 9 6 ) ) PUNCT ispiv-67 9 7 . . PUNCT ispiv-67 10 1 using use VERB ispiv-67 10 2 a a DET ispiv-67 10 3 model model NOUN ispiv-67 10 4 experiment experiment NOUN ispiv-67 10 5 of of ADP ispiv-67 10 6 a a DET ispiv-67 10 7 tes tes NOUN ispiv-67 10 8 , , PUNCT ispiv-67 10 9 the the DET ispiv-67 10 10 entire entire ADJ ispiv-67 10 11 vertical vertical ADJ ispiv-67 10 12 extent extent NOUN ispiv-67 10 13 of of ADP ispiv-67 10 14 the the DET ispiv-67 10 15 detected detect VERB ispiv-67 10 16 wall wall NOUN ispiv-67 10 17 jets jet NOUN ispiv-67 10 18 is be AUX ispiv-67 10 19 investigated investigate VERB ispiv-67 10 20 . . PUNCT ispiv-67 11 1 hence hence ADV ispiv-67 11 2 , , PUNCT ispiv-67 11 3 the the DET ispiv-67 11 4 typical typical ADJ ispiv-67 11 5 flow flow NOUN ispiv-67 11 6 structures structure NOUN ispiv-67 11 7 of of ADP ispiv-67 11 8 vertical vertical ADJ ispiv-67 11 9 , , PUNCT ispiv-67 11 10 natural natural ADJ ispiv-67 11 11 convection convection NOUN ispiv-67 11 12 under under ADP ispiv-67 11 13 the the DET ispiv-67 11 14 influence influence NOUN ispiv-67 11 15 of of ADP ispiv-67 11 16 non non ADJ ispiv-67 11 17 - - ADJ ispiv-67 11 18 zero zero NUM ispiv-67 11 19 temperature temperature NOUN ispiv-67 11 20 gradients gradient NOUN ispiv-67 11 21 in in ADP ispiv-67 11 22 the the DET ispiv-67 11 23 ambient ambient ADJ ispiv-67 11 24 fluid fluid NOUN ispiv-67 11 25 can can AUX ispiv-67 11 26 be be AUX ispiv-67 11 27 analyzed analyze VERB ispiv-67 11 28 , , PUNCT ispiv-67 11 29 which which PRON ispiv-67 11 30 can can AUX ispiv-67 11 31 help help VERB ispiv-67 11 32 to to PART ispiv-67 11 33 improve improve VERB ispiv-67 11 34 storage storage NOUN ispiv-67 11 35 tanks tank NOUN ispiv-67 11 36 in in ADP ispiv-67 11 37 the the DET ispiv-67 11 38 future future NOUN ispiv-67 11 39 . . PUNCT ispiv-67 12 1 the the DET ispiv-67 12 2 velocity velocity NOUN ispiv-67 12 3 in in ADP ispiv-67 12 4 the the DET ispiv-67 12 5 region region NOUN ispiv-67 12 6 of of ADP ispiv-67 12 7 the the DET ispiv-67 12 8 wall wall NOUN ispiv-67 12 9 jets jet NOUN ispiv-67 12 10 is be AUX ispiv-67 12 11 measured measure VERB ispiv-67 12 12 via via ADP ispiv-67 12 13 2d 2d NUM ispiv-67 12 14 particle particle NOUN ispiv-67 12 15 - - PUNCT ispiv-67 12 16 image image NOUN ispiv-67 12 17 velocimetry velocimetry NOUN ispiv-67 12 18 ( ( PUNCT ispiv-67 12 19 piv piv NOUN ispiv-67 12 20 ) ) PUNCT ispiv-67 12 21 in in ADP ispiv-67 12 22 a a DET ispiv-67 12 23 rectangular rectangular ADJ ispiv-67 12 24 model model NOUN ispiv-67 12 25 experiment experiment NOUN ispiv-67 12 26 of of ADP ispiv-67 12 27 750 750 NUM ispiv-67 12 28 mm mm NOUN ispiv-67 12 29 height height NOUN ispiv-67 12 30 on on ADP ispiv-67 12 31 a a DET ispiv-67 12 32 base base NOUN ispiv-67 12 33 area area NOUN ispiv-67 12 34 of of ADP ispiv-67 12 35 375mm× 375mm× ADV ispiv-67 12 36 375 375 NUM ispiv-67 12 37 mm mm NOUN ispiv-67 12 38 made make VERB ispiv-67 12 39 from from ADP ispiv-67 12 40 polycarbonate polycarbonate NOUN ispiv-67 12 41 . . PUNCT ispiv-67 13 1 the the DET ispiv-67 13 2 jets jet NOUN ispiv-67 13 3 evolve evolve VERB ispiv-67 13 4 on on ADP ispiv-67 13 5 the the DET ispiv-67 13 6 surface surface NOUN ispiv-67 13 7 of of ADP ispiv-67 13 8 an an DET ispiv-67 13 9 aluminum aluminum NOUN ispiv-67 13 10 plate plate NOUN ispiv-67 13 11 simulating simulate VERB ispiv-67 13 12 the the DET ispiv-67 13 13 storage storage NOUN ispiv-67 13 14 tank tank NOUN ispiv-67 13 15 ’s ’s PART ispiv-67 13 16 sidewall sidewall NOUN ispiv-67 13 17 . . PUNCT ispiv-67 14 1 the the DET ispiv-67 14 2 measuring measure VERB ispiv-67 14 3 system system NOUN ispiv-67 14 4 consists consist VERB ispiv-67 14 5 of of ADP ispiv-67 14 6 four four NUM ispiv-67 14 7 cameras camera NOUN ispiv-67 14 8 with with ADP ispiv-67 14 9 a a DET ispiv-67 14 10 resolution resolution NOUN ispiv-67 14 11 of of ADP ispiv-67 14 12 2160×2560 2160×2560 ADJ ispiv-67 14 13 pixels pixel NOUN ispiv-67 14 14 combined combine VERB ispiv-67 14 15 with with ADP ispiv-67 14 16 objective objective ADJ ispiv-67 14 17 lenses lense NOUN ispiv-67 14 18 with with ADP ispiv-67 14 19 100 100 NUM ispiv-67 14 20 mm mm NUM ispiv-67 14 21 focal focal ADJ ispiv-67 14 22 length length NOUN ispiv-67 14 23 capturing capture VERB ispiv-67 14 24 the the DET ispiv-67 14 25 raw raw ADJ ispiv-67 14 26 images image NOUN ispiv-67 14 27 in in ADP ispiv-67 14 28 a a DET ispiv-67 14 29 plane plane NOUN ispiv-67 14 30 perpendicular perpendicular NOUN ispiv-67 14 31 to to ADP ispiv-67 14 32 the the DET ispiv-67 14 33 aluminum aluminum NOUN ispiv-67 14 34 wall wall NOUN ispiv-67 14 35 . . PUNCT ispiv-67 15 1 a a DET ispiv-67 15 2 nd nd NOUN ispiv-67 15 3 : : PUNCT ispiv-67 15 4 yag yag NOUN ispiv-67 15 5 laser laser NOUN ispiv-67 15 6 with with ADP ispiv-67 15 7 a a DET ispiv-67 15 8 wavelength wavelength NOUN ispiv-67 15 9 of of ADP ispiv-67 15 10 532 532 NUM ispiv-67 15 11 nm nm NOUN ispiv-67 15 12 illuminates illuminate VERB ispiv-67 15 13 the the DET ispiv-67 15 14 measuring measure VERB ispiv-67 15 15 plane plane NOUN ispiv-67 15 16 . . PUNCT ispiv-67 16 1 simultaneously simultaneously ADV ispiv-67 16 2 using use VERB ispiv-67 16 3 up up ADP ispiv-67 16 4 to to PART ispiv-67 16 5 four four NUM ispiv-67 16 6 cameras camera NOUN ispiv-67 16 7 adjacent adjacent ADJ ispiv-67 16 8 to to ADP ispiv-67 16 9 each each DET ispiv-67 16 10 other other ADJ ispiv-67 16 11 and and CCONJ ispiv-67 16 12 stitching stitch VERB ispiv-67 16 13 their their PRON ispiv-67 16 14 resulting result VERB ispiv-67 16 15 vector vector NOUN ispiv-67 16 16 fields field NOUN ispiv-67 16 17 , , PUNCT ispiv-67 16 18 the the DET ispiv-67 16 19 vertical vertical ADJ ispiv-67 16 20 extent extent NOUN ispiv-67 16 21 of of ADP ispiv-67 16 22 the the DET ispiv-67 16 23 field field NOUN ispiv-67 16 24 of of ADP ispiv-67 16 25 view view NOUN ispiv-67 16 26 increases increase NOUN ispiv-67 16 27 from from ADP ispiv-67 16 28 38 38 NUM ispiv-67 16 29 mm mm NOUN ispiv-67 16 30 up up ADP ispiv-67 16 31 to to ADP ispiv-67 16 32 140 140 NUM ispiv-67 16 33 mm mm NOUN ispiv-67 16 34 . . PUNCT ispiv-67 17 1 despite despite SCONJ ispiv-67 17 2 this this PRON ispiv-67 17 3 , , PUNCT ispiv-67 17 4 the the DET ispiv-67 17 5 field field NOUN ispiv-67 17 6 of of ADP ispiv-67 17 7 view view NOUN ispiv-67 17 8 is be AUX ispiv-67 17 9 still still ADV ispiv-67 17 10 much much ADV ispiv-67 17 11 smaller small ADJ ispiv-67 17 12 than than ADP ispiv-67 17 13 the the DET ispiv-67 17 14 vertical vertical ADJ ispiv-67 17 15 extent extent NOUN ispiv-67 17 16 of of ADP ispiv-67 17 17 the the DET ispiv-67 17 18 model model NOUN ispiv-67 17 19 experiment experiment NOUN ispiv-67 17 20 , , PUNCT ispiv-67 17 21 so so SCONJ ispiv-67 17 22 that that SCONJ ispiv-67 17 23 seven seven NUM ispiv-67 17 24 consecutive consecutive ADJ ispiv-67 17 25 runs run NOUN ispiv-67 17 26 are be AUX ispiv-67 17 27 performed perform VERB ispiv-67 17 28 to to PART ispiv-67 17 29 cover cover VERB ispiv-67 17 30 the the DET ispiv-67 17 31 entire entire ADJ ispiv-67 17 32 height height NOUN ispiv-67 17 33 . . PUNCT ispiv-67 18 1 disturbing disturb VERB ispiv-67 18 2 reflections reflection NOUN ispiv-67 18 3 of of ADP ispiv-67 18 4 the the DET ispiv-67 18 5 laser laser NOUN ispiv-67 18 6 light light ADJ ispiv-67 18 7 sheet sheet NOUN ispiv-67 18 8 on on ADP ispiv-67 18 9 the the DET ispiv-67 18 10 aluminum aluminum NOUN ispiv-67 18 11 wall wall NOUN ispiv-67 18 12 are be AUX ispiv-67 18 13 eliminated eliminate VERB ispiv-67 18 14 using use VERB ispiv-67 18 15 optical optical ADJ ispiv-67 18 16 filters filter NOUN ispiv-67 18 17 for for ADP ispiv-67 18 18 the the DET ispiv-67 18 19 cameras camera NOUN ispiv-67 18 20 that that PRON ispiv-67 18 21 are be AUX ispiv-67 18 22 opaque opaque ADJ ispiv-67 18 23 for for ADP ispiv-67 18 24 the the DET ispiv-67 18 25 green green ADJ ispiv-67 18 26 laser laser NOUN ispiv-67 18 27 light light NOUN ispiv-67 18 28 in in ADP ispiv-67 18 29 combination combination NOUN ispiv-67 18 30 with with ADP ispiv-67 18 31 fluorescently fluorescently ADV ispiv-67 18 32 ( ( PUNCT ispiv-67 18 33 rhodamine rhodamine PROPN ispiv-67 18 34 b b PROPN ispiv-67 18 35 ) ) PUNCT ispiv-67 18 36 dyed dye VERB ispiv-67 18 37 pmma pmma NOUN ispiv-67 18 38 tracer tracer NOUN ispiv-67 18 39 particles particle NOUN ispiv-67 18 40 with with ADP ispiv-67 18 41 a a DET ispiv-67 18 42 diameter diameter NOUN ispiv-67 18 43 between between ADP ispiv-67 18 44 1–20 1–20 PROPN ispiv-67 18 45 µm µm NOUN ispiv-67 18 46 . . PUNCT ispiv-67 19 1 the the DET ispiv-67 19 2 particles particle NOUN ispiv-67 19 3 emit emit VERB ispiv-67 19 4 light light NOUN ispiv-67 19 5 at at ADP ispiv-67 19 6 a a DET ispiv-67 19 7 wavelength wavelength NOUN ispiv-67 19 8 of of ADP ispiv-67 19 9 610 610 NUM ispiv-67 19 10 nm nm NOUN ispiv-67 19 11 ( ( PUNCT ispiv-67 19 12 orange orange ADJ ispiv-67 19 13 light light NOUN ispiv-67 19 14 ) ) PUNCT ispiv-67 19 15 and and CCONJ ispiv-67 19 16 can can AUX ispiv-67 19 17 therefore therefore ADV ispiv-67 19 18 be be AUX ispiv-67 19 19 detected detect VERB ispiv-67 19 20 through through ADP ispiv-67 19 21 the the DET ispiv-67 19 22 cameras camera NOUN ispiv-67 19 23 ’ ' PUNCT ispiv-67 19 24 filters filter NOUN ispiv-67 19 25 . . PUNCT ispiv-67 20 1 during during ADP ispiv-67 20 2 four four NUM ispiv-67 20 3 separate separate ADJ ispiv-67 20 4 measuring measuring NOUN ispiv-67 20 5 periods period NOUN ispiv-67 20 6 , , PUNCT ispiv-67 20 7 where where SCONJ ispiv-67 20 8 each each PRON ispiv-67 20 9 lasts last VERB ispiv-67 20 10 for for ADP ispiv-67 20 11 two two NUM ispiv-67 20 12 minutes minute NOUN ispiv-67 20 13 , , PUNCT ispiv-67 20 14 double double ADJ ispiv-67 20 15 frame frame NOUN ispiv-67 20 16 images image NOUN ispiv-67 20 17 are be AUX ispiv-67 20 18 captured capture VERB ispiv-67 20 19 with with ADP ispiv-67 20 20 a a DET ispiv-67 20 21 time time NOUN ispiv-67 20 22 difference difference NOUN ispiv-67 20 23 of of ADP ispiv-67 20 24 19.981 19.981 NUM ispiv-67 20 25 ms ms NOUN ispiv-67 20 26 ( ( PUNCT ispiv-67 20 27 maximum maximum ADJ ispiv-67 20 28 possible possible ADJ ispiv-67 20 29 value value NOUN ispiv-67 20 30 ) ) PUNCT ispiv-67 20 31 at at ADP ispiv-67 20 32 a a DET ispiv-67 20 33 measuring measure VERB ispiv-67 20 34 frequency frequency NOUN ispiv-67 20 35 of of ADP ispiv-67 20 36 7 7 NUM ispiv-67 20 37 hz hz NOUN ispiv-67 20 38 . . PROPN ispiv-67 20 39 figure figure NOUN ispiv-67 20 40 1 1 NUM ispiv-67 20 41 shows show VERB ispiv-67 20 42 a a DET ispiv-67 20 43 schematic schematic NOUN ispiv-67 20 44 of of ADP ispiv-67 20 45 the the DET ispiv-67 20 46 camera camera NOUN ispiv-67 20 47 setup setup NOUN ispiv-67 20 48 next next ADV ispiv-67 20 49 to to ADP ispiv-67 20 50 the the DET ispiv-67 20 51 model model NOUN ispiv-67 20 52 experiment experiment NOUN ispiv-67 20 53 and and CCONJ ispiv-67 20 54 the the DET ispiv-67 20 55 measurement measurement NOUN ispiv-67 20 56 and and CCONJ ispiv-67 20 57 evaluation evaluation NOUN ispiv-67 20 58 procedure procedure NOUN ispiv-67 20 59 to to PART ispiv-67 20 60 finally finally ADV ispiv-67 20 61 receive receive VERB ispiv-67 20 62 one one NUM ispiv-67 20 63 time time NOUN ispiv-67 20 64 - - PUNCT ispiv-67 20 65 averaged average VERB ispiv-67 20 66 velocity velocity NOUN ispiv-67 20 67 field field NOUN ispiv-67 20 68 per per ADP ispiv-67 20 69 measuring measure VERB ispiv-67 20 70 period period NOUN ispiv-67 20 71 of of ADP ispiv-67 20 72 the the DET ispiv-67 20 73 full full ADJ ispiv-67 20 74 height height NOUN ispiv-67 20 75 of of ADP ispiv-67 20 76 the the DET ispiv-67 20 77 experiment experiment NOUN ispiv-67 20 78 . . PUNCT ispiv-67 21 1 the the DET ispiv-67 21 2 raw raw ADJ ispiv-67 21 3 data data NOUN ispiv-67 21 4 evaluation evaluation NOUN ispiv-67 21 5 process process NOUN ispiv-67 21 6 starts start VERB ispiv-67 21 7 with with ADP ispiv-67 21 8 calculating calculate VERB ispiv-67 21 9 the the DET ispiv-67 21 10 vector vector NOUN ispiv-67 21 11 fields field NOUN ispiv-67 21 12 of of ADP ispiv-67 21 13 all all DET ispiv-67 21 14 cameras camera NOUN ispiv-67 21 15 used use VERB ispiv-67 21 16 at at ADP ispiv-67 21 17 a a DET ispiv-67 21 18 certain certain ADJ ispiv-67 21 19 measuring measuring NOUN ispiv-67 21 20 position position NOUN ispiv-67 21 21 and and CCONJ ispiv-67 21 22 stitching stitch VERB ispiv-67 21 23 them they PRON ispiv-67 21 24 to to ADP ispiv-67 21 25 one one NUM ispiv-67 21 26 flow flow NOUN ispiv-67 21 27 field field NOUN ispiv-67 21 28 of of ADP ispiv-67 21 29 this this DET ispiv-67 21 30 position position NOUN ispiv-67 21 31 . . PUNCT ispiv-67 22 1 since since SCONJ ispiv-67 22 2 the the DET ispiv-67 22 3 wall wall PROPN ispiv-67 22 4 jets jet NOUN ispiv-67 22 5 ’ ' PUNCT ispiv-67 22 6 horizontal horizontal ADJ ispiv-67 22 7 extents extent NOUN ispiv-67 22 8 are be AUX ispiv-67 22 9 with with ADP ispiv-67 22 10 2–7 2–7 NOUN ispiv-67 22 11 mm mm NOUN ispiv-67 22 12 relatively relatively ADV ispiv-67 22 13 small small ADJ ispiv-67 22 14 and and CCONJ ispiv-67 22 15 they they PRON ispiv-67 22 16 show show VERB ispiv-67 22 17 high high ADJ ispiv-67 22 18 velocity velocity NOUN ispiv-67 22 19 gradients gradient NOUN ispiv-67 22 20 , , PUNCT ispiv-67 22 21 the the DET ispiv-67 22 22 raw raw ADJ ispiv-67 22 23 images image NOUN ispiv-67 22 24 are be AUX ispiv-67 22 25 evaluated evaluate VERB ispiv-67 22 26 in in ADP ispiv-67 22 27 both both PRON ispiv-67 22 28 single single ADJ ispiv-67 22 29 - - PUNCT ispiv-67 22 30 frame frame NOUN ispiv-67 22 31 and and CCONJ ispiv-67 22 32 double double ADJ ispiv-67 22 33 - - PUNCT ispiv-67 22 34 frame frame NOUN ispiv-67 22 35 mode mode NOUN ispiv-67 22 36 . . PUNCT ispiv-67 23 1 with with ADP ispiv-67 23 2 a a DET ispiv-67 23 3 velocity velocity NOUN ispiv-67 23 4 threshold threshold NOUN ispiv-67 23 5 that that PRON ispiv-67 23 6 corresponds correspond VERB ispiv-67 23 7 to to ADP ispiv-67 23 8 a a DET ispiv-67 23 9 pixel pixel ADJ ispiv-67 23 10 displacement displacement NOUN ispiv-67 23 11 of of ADP ispiv-67 23 12 1 1 NUM ispiv-67 23 13 4 4 NUM ispiv-67 23 14 of of ADP ispiv-67 23 15 the the DET ispiv-67 23 16 interrogation interrogation NOUN ispiv-67 23 17 window window NOUN ispiv-67 23 18 size size NOUN ispiv-67 23 19 and and CCONJ ispiv-67 23 20 the the DET ispiv-67 23 21 time time NOUN ispiv-67 23 22 difference difference NOUN ispiv-67 23 23 of of ADP ispiv-67 23 24 the the DET ispiv-67 23 25 single single ADJ ispiv-67 23 26 - - PUNCT ispiv-67 23 27 frames frame NOUN ispiv-67 23 28 , , PUNCT ispiv-67 23 29 the the DET ispiv-67 23 30 resulting result VERB ispiv-67 23 31 vector vector NOUN ispiv-67 23 32 fields field NOUN ispiv-67 23 33 are be AUX ispiv-67 23 34 masked mask VERB ispiv-67 23 35 and and CCONJ ispiv-67 23 36 merged merge VERB ispiv-67 23 37 into into ADP ispiv-67 23 38 one one NUM ispiv-67 23 39 final final ADJ ispiv-67 23 40 vector vector NOUN ispiv-67 23 41 field field NOUN ispiv-67 23 42 . . PUNCT ispiv-67 24 1 this this DET ispiv-67 24 2 vector vector NOUN ispiv-67 24 3 field field NOUN ispiv-67 24 4 consists consist VERB ispiv-67 24 5 of of ADP ispiv-67 24 6 high high ADJ ispiv-67 24 7 velocities velocity NOUN ispiv-67 24 8 evaluated evaluate VERB ispiv-67 24 9 in in ADP ispiv-67 24 10 double double ADJ ispiv-67 24 11 - - PUNCT ispiv-67 24 12 frame frame NOUN ispiv-67 24 13 mode mode NOUN ispiv-67 24 14 and and CCONJ ispiv-67 24 15 low low ADJ ispiv-67 24 16 velocities velocity NOUN ispiv-67 24 17 evaluated evaluate VERB ispiv-67 24 18 in in ADP ispiv-67 24 19 single single ADJ ispiv-67 24 20 - - PUNCT ispiv-67 24 21 frame frame NOUN ispiv-67 24 22 mode mode NOUN ispiv-67 24 23 ( ( PUNCT ispiv-67 24 24 see see VERB ispiv-67 24 25 figure figure NOUN ispiv-67 24 26 2 2 NUM ispiv-67 24 27 ) ) PUNCT ispiv-67 24 28 thus thus ADV ispiv-67 24 29 minimizing minimize VERB ispiv-67 24 30 the the DET ispiv-67 24 31 relative relative ADJ ispiv-67 24 32 error error NOUN ispiv-67 24 33 . . PUNCT ispiv-67 25 1 the the DET ispiv-67 25 2 algorithm algorithm NOUN ispiv-67 25 3 used use VERB ispiv-67 25 4 in in ADP ispiv-67 25 5 this this DET ispiv-67 25 6 work work NOUN ispiv-67 25 7 is be AUX ispiv-67 25 8 similar similar ADJ ispiv-67 25 9 to to ADP ispiv-67 25 10 the the DET ispiv-67 25 11 multi multi ADJ ispiv-67 25 12 - - ADJ ispiv-67 25 13 frame frame ADJ ispiv-67 25 14 piv piv NOUN ispiv-67 25 15 approach approach NOUN ispiv-67 25 16 introduced introduce VERB ispiv-67 25 17 by by ADP ispiv-67 25 18 hain hain NOUN ispiv-67 25 19 and and CCONJ ispiv-67 25 20 kähler kähler PROPN ispiv-67 25 21 ( ( PUNCT ispiv-67 25 22 2007 2007 NUM ispiv-67 25 23 ) ) PUNCT ispiv-67 25 24 . . PUNCT ispiv-67 26 1 figure figure NOUN ispiv-67 26 2 3 3 NUM ispiv-67 26 3 shows show VERB ispiv-67 26 4 the the DET ispiv-67 26 5 time time NOUN ispiv-67 26 6 - - PUNCT ispiv-67 26 7 averaged average VERB ispiv-67 26 8 results result NOUN ispiv-67 26 9 of of ADP ispiv-67 26 10 the the DET ispiv-67 26 11 first first ADJ ispiv-67 26 12 measuring measuring NOUN ispiv-67 26 13 period period NOUN ispiv-67 26 14 for for ADP ispiv-67 26 15 each each PRON ispiv-67 26 16 of of ADP ispiv-67 26 17 the the DET ispiv-67 26 18 seven seven NUM ispiv-67 26 19 measuring measure VERB ispiv-67 26 20 positions position NOUN ispiv-67 26 21 in in ADP ispiv-67 26 22 height height NOUN ispiv-67 26 23 . . PUNCT ispiv-67 27 1 measuring measure VERB ispiv-67 27 2 plane plane NOUN ispiv-67 27 3 field field NOUN ispiv-67 27 4 of of ADP ispiv-67 27 5 view view NOUN ispiv-67 27 6 cameras camera NOUN ispiv-67 27 7 measurements measurement NOUN ispiv-67 27 8 at at ADP ispiv-67 27 9 7 7 NUM ispiv-67 27 10 different different ADJ ispiv-67 27 11 heights height NOUN ispiv-67 27 12 7 7 NUM ispiv-67 27 13 hz hz AUX ispiv-67 27 14 meas mea NOUN ispiv-67 27 15 . . PUNCT ispiv-67 28 1 frequency frequency NOUN ispiv-67 28 2 ∆t ∆t NOUN ispiv-67 28 3 ∼ ∼ NOUN ispiv-67 28 4 20 20 NUM ispiv-67 28 5 ms ms NOUN ispiv-67 28 6 double double ADJ ispiv-67 28 7 frame frame NOUN ispiv-67 28 8 single single ADJ ispiv-67 28 9 frame frame NOUN ispiv-67 28 10 masking masking NOUN ispiv-67 28 11 of of ADP ispiv-67 28 12 double double ADJ ispiv-67 28 13 frame frame NOUN ispiv-67 28 14 and and CCONJ ispiv-67 28 15 single single ADJ ispiv-67 28 16 frame frame NOUN ispiv-67 28 17 vector vector NOUN ispiv-67 28 18 fields field NOUN ispiv-67 28 19 combined combine VERB ispiv-67 28 20 vector vector NOUN ispiv-67 28 21 field field NOUN ispiv-67 28 22 results result VERB ispiv-67 28 23 stitching stitching NOUN ispiv-67 28 24 of of ADP ispiv-67 28 25 7 7 NUM ispiv-67 28 26 measurements measurement NOUN ispiv-67 28 27 → → PUNCT ispiv-67 28 28 averaged average VERB ispiv-67 28 29 vector vector NOUN ispiv-67 28 30 field field NOUN ispiv-67 28 31 of of ADP ispiv-67 28 32 the the DET ispiv-67 28 33 entire entire ADJ ispiv-67 28 34 measuring measure VERB ispiv-67 28 35 plane plane NOUN ispiv-67 28 36 model model NOUN ispiv-67 28 37 room room NOUN ispiv-67 28 38 + + CCONJ ispiv-67 28 39 alu alu PROPN ispiv-67 28 40 . . PROPN ispiv-67 28 41 plate plate NOUN ispiv-67 28 42 figure figure NOUN ispiv-67 28 43 1 1 NUM ispiv-67 28 44 : : PUNCT ispiv-67 28 45 schematic schematic ADJ ispiv-67 28 46 of of ADP ispiv-67 28 47 the the DET ispiv-67 28 48 camera camera NOUN ispiv-67 28 49 setup setup NOUN ispiv-67 28 50 and and CCONJ ispiv-67 28 51 the the DET ispiv-67 28 52 evaluation evaluation NOUN ispiv-67 28 53 procedure procedure NOUN ispiv-67 28 54 . . PUNCT ispiv-67 29 1 figure figure NOUN ispiv-67 29 2 2 2 NUM ispiv-67 29 3 : : PUNCT ispiv-67 29 4 a a X ispiv-67 29 5 ) ) PUNCT ispiv-67 29 6 masking masking NOUN ispiv-67 29 7 areas area NOUN ispiv-67 29 8 of of ADP ispiv-67 29 9 single single ADJ ispiv-67 29 10 and and CCONJ ispiv-67 29 11 double double ADJ ispiv-67 29 12 frame frame NOUN ispiv-67 29 13 evaluation evaluation NOUN ispiv-67 29 14 . . PUNCT ispiv-67 30 1 b b X ispiv-67 30 2 ) ) PUNCT ispiv-67 30 3 resulting result VERB ispiv-67 30 4 vertical vertical ADJ ispiv-67 30 5 velocity velocity NOUN ispiv-67 30 6 field field NOUN ispiv-67 30 7 after after ADP ispiv-67 30 8 merging merge VERB ispiv-67 30 9 . . PUNCT ispiv-67 31 1 figure figure NOUN ispiv-67 31 2 3 3 NUM ispiv-67 31 3 : : PUNCT ispiv-67 31 4 resulting result VERB ispiv-67 31 5 vertical vertical ADJ ispiv-67 31 6 velocity velocity NOUN ispiv-67 31 7 fields field NOUN ispiv-67 31 8 of of ADP ispiv-67 31 9 the the DET ispiv-67 31 10 7 7 NUM ispiv-67 31 11 measurements measurement NOUN ispiv-67 31 12 at at ADP ispiv-67 31 13 different different ADJ ispiv-67 31 14 heights height NOUN ispiv-67 31 15 . . PUNCT ispiv-67 32 1 subfigure subfigure PROPN ispiv-67 32 2 b b X ispiv-67 32 3 ) ) PUNCT ispiv-67 32 4 equals equal VERB ispiv-67 32 5 figure figure NOUN ispiv-67 32 6 2b 2b NOUN ispiv-67 32 7 ) ) PUNCT ispiv-67 32 8 . . PUNCT ispiv-67 33 1 each each DET ispiv-67 33 2 subfigure subfigure NOUN ispiv-67 33 3 shows show VERB ispiv-67 33 4 the the DET ispiv-67 33 5 stitched stitched ADJ ispiv-67 33 6 velocity velocity NOUN ispiv-67 33 7 field field NOUN ispiv-67 33 8 of of ADP ispiv-67 33 9 all all DET ispiv-67 33 10 cameras camera NOUN ispiv-67 33 11 used use VERB ispiv-67 33 12 during during ADP ispiv-67 33 13 that that DET ispiv-67 33 14 measurement measurement NOUN ispiv-67 33 15 . . PUNCT ispiv-67 34 1 acknowledgements acknowledgement VERB ispiv-67 34 2 the the DET ispiv-67 34 3 authors author NOUN ispiv-67 34 4 acknowledge acknowledge VERB ispiv-67 34 5 support support NOUN ispiv-67 34 6 from from ADP ispiv-67 34 7 the the DET ispiv-67 34 8 german german ADJ ispiv-67 34 9 research research NOUN ispiv-67 34 10 foundation foundation PROPN ispiv-67 34 11 ( ( PUNCT ispiv-67 34 12 deutsche deutsche NOUN ispiv-67 34 13 forschungsgemeinschaft forschungsgemeinschaft NOUN ispiv-67 34 14 , , PUNCT ispiv-67 34 15 dfg dfg PROPN ispiv-67 34 16 ) ) PUNCT ispiv-67 34 17 within within ADP ispiv-67 34 18 the the DET ispiv-67 34 19 priority priority NOUN ispiv-67 34 20 programme programme NOUN ispiv-67 34 21 turbulent turbulent ADJ ispiv-67 34 22 superstructures superstructure NOUN ispiv-67 34 23 spp spp VERB ispiv-67 34 24 1881 1881 NUM ispiv-67 34 25 . . PUNCT ispiv-67 35 1 references reference NOUN ispiv-67 35 2 alva alva PROPN ispiv-67 35 3 g g PROPN ispiv-67 35 4 , , PUNCT ispiv-67 35 5 lin lin PROPN ispiv-67 35 6 y y PROPN ispiv-67 35 7 , , PUNCT ispiv-67 35 8 and and CCONJ ispiv-67 35 9 fang fang PROPN ispiv-67 35 10 g g PROPN ispiv-67 35 11 ( ( PUNCT ispiv-67 35 12 2018 2018 NUM ispiv-67 35 13 ) ) PUNCT ispiv-67 35 14 an an DET ispiv-67 35 15 overview overview NOUN ispiv-67 35 16 of of ADP ispiv-67 35 17 thermal thermal ADJ ispiv-67 35 18 energy energy NOUN ispiv-67 35 19 storage storage NOUN ispiv-67 35 20 systems system NOUN ispiv-67 35 21 . . PUNCT ispiv-67 36 1 energy energy NOUN ispiv-67 36 2 144:341–378 144:341–378 NUM ispiv-67 36 3 hain hain NOUN ispiv-67 36 4 r r NOUN ispiv-67 36 5 and and CCONJ ispiv-67 36 6 kähler kähler PROPN ispiv-67 36 7 cj cj PROPN ispiv-67 36 8 ( ( PUNCT ispiv-67 36 9 2007 2007 NUM ispiv-67 36 10 ) ) PUNCT ispiv-67 36 11 fundamentals fundamental NOUN ispiv-67 36 12 of of ADP ispiv-67 36 13 multiframe multiframe NOUN ispiv-67 36 14 particle particle NOUN ispiv-67 36 15 image image NOUN ispiv-67 36 16 velocimetry velocimetry NOUN ispiv-67 36 17 ( ( PUNCT ispiv-67 36 18 piv piv NOUN ispiv-67 36 19 ) ) PUNCT ispiv-67 36 20 . . PUNCT ispiv-67 37 1 experiments experiment NOUN ispiv-67 37 2 in in ADP ispiv-67 37 3 fluids fluid NOUN ispiv-67 37 4 42:575–587 42:575–587 PROPN ispiv-67 37 5 otto otto PROPN ispiv-67 37 6 h h NOUN ispiv-67 37 7 , , PUNCT ispiv-67 37 8 resagk resagk PROPN ispiv-67 37 9 c c NOUN ispiv-67 37 10 , , PUNCT ispiv-67 37 11 and and CCONJ ispiv-67 37 12 cierpka cierpka NOUN ispiv-67 37 13 c c NOUN ispiv-67 37 14 ( ( PUNCT ispiv-67 37 15 2019 2019 NUM ispiv-67 37 16 ) ) PUNCT ispiv-67 37 17 convective convective ADJ ispiv-67 37 18 near near ADJ ispiv-67 37 19 - - PUNCT ispiv-67 37 20 wall wall NOUN ispiv-67 37 21 flow flow NOUN ispiv-67 37 22 in in ADP ispiv-67 37 23 thermally thermally ADV ispiv-67 37 24 stratified stratify VERB ispiv-67 37 25 hot hot ADJ ispiv-67 37 26 water water NOUN ispiv-67 37 27 storage storage NOUN ispiv-67 37 28 tanks tank NOUN ispiv-67 37 29 . . PUNCT ispiv-67 38 1 in in ADP ispiv-67 38 2 proceedings proceeding NOUN ispiv-67 38 3 of of ADP ispiv-67 38 4 the the DET ispiv-67 38 5 13th 13th ADJ ispiv-67 38 6 international international ADJ ispiv-67 38 7 symposium symposium NOUN ispiv-67 38 8 on on ADP ispiv-67 38 9 particle particle NOUN ispiv-67 38 10 image image NOUN ispiv-67 38 11 velocimetry velocimetry NOUN ispiv-67 38 12 ispiv2019 ispiv2019 PROPN ispiv-67 38 13 , , PUNCT ispiv-67 38 14 munich munich PROPN ispiv-67 38 15 , , PUNCT ispiv-67 38 16 germany germany PROPN ispiv-67 38 17 , , PUNCT ispiv-67 38 18 july july PROPN ispiv-67 38 19 22 22 NUM ispiv-67 38 20 - - SYM ispiv-67 38 21 24 24 NUM ispiv-67 38 22 otto otto PROPN ispiv-67 38 23 h h PROPN ispiv-67 38 24 , , PUNCT ispiv-67 38 25 resagk resagk PROPN ispiv-67 38 26 c c NOUN ispiv-67 38 27 , , PUNCT ispiv-67 38 28 and and CCONJ ispiv-67 38 29 cierpka cierpka NOUN ispiv-67 38 30 c c PROPN ispiv-67 38 31 ( ( PUNCT ispiv-67 38 32 2020 2020 NUM ispiv-67 38 33 ) ) PUNCT ispiv-67 38 34 optical optical ADJ ispiv-67 38 35 measurements measurement NOUN ispiv-67 38 36 on on ADP ispiv-67 38 37 thermal thermal ADJ ispiv-67 38 38 convection convection NOUN ispiv-67 38 39 processes process NOUN ispiv-67 38 40 inside inside ADP ispiv-67 38 41 thermal thermal ADJ ispiv-67 38 42 energy energy NOUN ispiv-67 38 43 storages storage NOUN ispiv-67 38 44 during during ADP ispiv-67 38 45 stand stand NOUN ispiv-67 38 46 - - PUNCT ispiv-67 38 47 by by ADP ispiv-67 38 48 periods period NOUN ispiv-67 38 49 . . PUNCT ispiv-67 39 1 optics optic NOUN ispiv-67 39 2 1:155–172 1:155–172 PRON