Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   MARCH 2017 , Volume 16 , Number 12 #F0074; Page(s) 745 To 755.
 
Paper: 

NUMERICAL SOLUTION OF FLOW AND HEAT TRANSFER OF BINGHAM VISCOPLASTIC IN CAVITY

 
 
Author(s):  SADEGHI HOSSEIN, DEHGHAN ALI AKBAR, SEFID MOHAMMAD*
 
* DEPARTMENT OF MECHANICAL ENGINEERING, YAZD UNIVERSITY, YAZD, IRAN
 
Abstract: 

The cavity problem has always been considered as a classic and fundamental problem. Specific materials like Bingham viscoplastic which is a sort of Non-Newtonian fluid, shows resistance in a certain range of stress, calling yield stress, and almost acts like rigid body in this limited area. In case of increased applied stress, it flows like fluid. With consideration of heat transfer in this type of material, yield stress and viscosity variations with temperature as in practice we face will not be far-fetched. In the present work the numerical solution of the problem of Bingham material inside lid-driven cavity, investigating fluid flow and heat transfer in view of the changes in material properties have been done and results show changes in dimensionless numbers and parameters of Re=10-1000, Bn=1-2000, Pr=0.01-100 andE=5000-50000. In this study, the governing equations have been discretized and solved by using the finite volume method (FVM) and collocated grid. This work first compares the effect of viscosity and yield stress dependency on temperature with independence mode and then, distribution of horizontal and vertical components of velocity, yield areas and flow inside cavity, center of vortex and then heat transfer due to the stream lines next to side walls are analyzed.

 
Keyword(s): NON-NEWTONIAN FLUID, VISCOPLASTIC, BINGHAM, FINITE VOLUME, LID-DRIVEN CAVITY
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 14
 
Latest on Blog
Enter SID Blog