JP Journal of Heat and Mass Transfer
Volume 18, Issue 1, Pages 225 - 232
(October 2019) http://dx.doi.org/10.17654/HM018010225 |
|
NUMERICAL SOLUTION FOR THE EFFECT OF VARIABLE VISCOSITY ON NON-NEWTONIAN FLUID
Rajesh Kumar Gadekula and Raja Sekhar Dondapati
|
Abstract: The colloidal solution of solid particles dispersion in fluids can be evaluated as third grade non-Newtonian fluid. The rate of entropy generation in such fluids depends on viscosity, volumetric dispersion of solid particles and proper agitation. In this paper, the velocity and temperature distribution across the pipe is presented for Non-Newtonian fluid flow as the function of variable viscosity. The flow of fluid is considered to be thermodynamically compatible and incompressible and the results are presented by assuming the shear viscosity as the function of temperature. Various viscosity models such as constant viscosity, Vogel model, Reynolds model and collocation methods for predicting the velocity and temperature distributions. Nusselt number is determined for variation in Reynolds number and L/D ratio in order to predict the heat transfer rate which effects the entropy generation due to fluid flow in pipe. |
Keywords and phrases: entropy generation, non-Newtonian fluid, constant viscosity model, Reynolds model, Vogels model.
|
|
Number of Downloads: 255 | Number of Views: 756 |
|