HEAT TRANSFER IN LAMINAR FLOW IN VERTICAL CONCENTRIC ANNULI

抄録

A theoretical analysis of heat transfer to Newtonian fluids in laminar flow in concentric annul! was developed under the conditions of constant temperature inner wall and insulated outer wall, taking into account the temperature dependency of viscosity and density.
The arithmetic mean Nusselt number was obtained as a function of the Graetz number with K, μ_w/μ_o and Gr_w/Re_w as parameters.
Furthermore, experimental data were obtained for two different diameter ratios K.
It was found that theoretical predictions are in reasonably good accord with experimental data.