TY - JOUR
TI - Thermal radiation effects on the onset of unsteadiness of fluid flow in vertical microchannel filled with highly absorbing medium
AU - Abdollahzadeh Jamalabadi M Y
AU - Park Jae Hyun
AU - Lee Chang Yeop
JN - Thermal Science
PY - 2016
VL - 20
IS - 5
SP - 1585
EP - 1596
PT - Article
AB - This study presents the effect of thermal radiation on the steady flow in a  vertical micro channel filled with highly absorbing medium. The governing  equations (mass, momentum and energy equation with Rosseland approximation  and slip boundary condition) are solved analytically. The effects of thermal  radiation parameter, the temperature parameter, Reynolds number, Grashof  number, velocity slip length, and temperature jump on the velocity and  temperature profiles, Nusselt number, and skin friction coefficient are  investigated. Results show that the skin friction and the Nusselt number are  increased with increase in Grashof number, velocity slip, and pressure  gradient while temperature jump and Reynolds number have an adverse effect on  them. Furthermore, a criterion for the flow unsteadiness based on the  temperature parameter, thermal radiation parameter, and the temperature jump  is presented.