TY - JOUR
TI - Thermodynamic analysis of fluid flow in channels with wavy sinusoidal walls
AU - Bahaidarah Haitham M. S.
AU - Sahin Ahmet Z
JN - Thermal Science
PY - 2013
VL - 17
IS - 3
SP - 813
EP - 822
PT - Article
AB - Entropy generation in channels with non-uniform cross-section that can be  found in many fluid flow systems is an important concern from the  thermodynamic design point of view. In this regard, the entropy generation in  channels with periodic wavy sinusoidal walls has been considered in present  study. The flow is assumed to be two-dimensional steady laminar and the main  parameters considered are the Re number, height ratio Hmin/Hmax and module  length ratio L/a. The fluid enters the channel with uniform axial velocity  and temperature. The wall of the channel is assumed to be at uniform  temperature which is different that of the fluid at the inlet of the channel.  The distribution of the entropy generation as well as the total entropy  generation has been studied numerically. It is found that the Re number and  the geometric parameters, height ratio and module length ratio have  significant effect on both the local concentrations of entropy generation as  well as the total entropy generation in the channel. Flow separation and  re-circulation size, strength and location of flow are found to be major  concern in determining the local entropy generation.