id	keyword
ap-5960	heat
ap-5960	grooves
ap-5960	transfer
ap-5960	heat transfer
ap-5960	annulus
ap-5960	friction
ap-5960	pipe
ap-5960	exchanger
ap-5960	flow
ap-5960	fluid
ap-5960	number
ap-5960	doi:10.1016
ap-5960	heat exchanger
ap-5960	tube