TY - JOUR
TI - Entropy generation due to external fluid flow and heat transfer from a cylinder between parallel planes
AU - Melhem Omar A
AU - Sahin Ahmet Z
AU - Yilbas Bekir S
JN - Thermal Science
PY - 2017
VL - 21
IS - 2
SP - 841
EP - 848
PT - Article
AB - In the present study, second law analysis is introduced for circular cylinder confined between parallel planes. An analytical approach is adopted to study the effects of block age, Reynolds and Prandtl numbers on the entropy generation due to the laminar flow and heat transfer. Four different fluids are considered in the present analysis for comparison purposes. Heat transfer for the cylinder at an isothermal boundary condition is incorporated. In general, the entropy generation rate decreases as the blockage ratio decreases. In addition, the entropy generation rate increases with increasing Reynolds and Prandtl numbers. At a fixed Reynolds number, the effect of block age becomes more notice able for higher Prandtl number fluid. Similarly, for the same fluid, the effect of block age becomes more no tice able as the Reynolds number increases.