id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-3729		cet-3729		6	.pdf	application/pdf	2282	85	34	The values of the convective heat transfer coefficient determined from Eq(2) and dimensionless numbers that can be used in Eq(4), determined for the three values of the thermal power are shown in Table 1. 494 Table 1: Experimentally determined values of the dimensionless numbers and heat-transfer coefficient Case 1 2 3 Heat flux at radiator base, q [W/m2] 412.7 989.4 9,386 Grashof number, Gr 27,625 49,619 258,195 Nusselt number, Nu 6.06 7.69 11.27 Heat transfer coefficient, h [W/(m2K)] 4.76 6.04 8.85 2.3 Boundary conditions For the purpose of numerical simulation the following data were used:  Thermal conductivity of aluminium kAl =180 W/(mK),  Ambient temperature 295 K,  Thermal conductivity of air ka=0.0256 W/(mK),  Heat flux transferred from the base of the radiator for three cases in accordance with Table 1,  Convective heat transfer coefficients for three cases in accordance with Table 1. 3. In general, the intensity of the convective heat transfer can be expressed by the following equation: q=h(Text - Tamb) (1) where q is the average heat flux lost from the radiator surface, h is the average convective heat transfer coefficient, Text and Tamb denote temperatures of radiator surface and ambient, respectively.	cache/cet-3729.pdf	txt/cet-3729.txt