ISSN Online: 2377-424X
ISBN Print: 0-89116-130-9
International Heat Transfer Conference 6
NUMERICAL SOLUTION OF HEAT TRANSFER TO YIELD POWER LAW FLUIDS FLOWING IN THE ENTRANCE REGION
Abstract
In the present work, the numerical solutions of conservation equations (mass, momentum and energy) have been obtained for a non-Newtonian fluid flowing through a circular duct and through a parallel channel. It is assumed that the non-Newtonian flow characteristic of a fluid can be expressed through a yield power law rheological relation and that the effects of temperature on the rheological parameters are negligible. The forward marching procedure of Patankar and Spalding [1970] has been used to obtain the numerical solutions. The results have been obtained for a wide range of power law exponents (n = 0.5−1.5), yield numbers (Y = 0 − 20) and Prandtl numbers (0.1 − 10). The solution of the energy equation has been obtained for two surface boundary conditions: (i) uniform surface temperature and (ii) uniform heat flux.