Heat Transfer Coefficients of Pseudoplastic Fluid

Abstract

Pseudoplastic fluids are excellent stuff for study, because they are a solution consisting mainly of high molecular compounds. But heat transfer coefficients of pseudoplastic fluids have scarcely been investigated except by Chu and others whose data on water solution of PVA are limited mostly to turbulent flow.The author conducted experiments on heat transfer coefficients in laminar flow, using starch paste, with a view to theoretically solving heeat transfer in laminar flow of pseudoplastic fluids.n, ηpsu and ηpsu* of starch paste were obtained from the results shown in Figure 4, and heat conductivity and specific heat from the results in Figures 1 and 2.For laminar flow, the following equation was obtained with the aid of data on heating and co- oling of starch pastBy rearranging Chu and others' data on water solution of CMC, PVA, and SPM, and the autho's data, an equation for laminar flow was obtained as:orFurther, when Repsu was from 2, 000 up to 8, 000, the results were as shown in Figure 8.