Доступ предоставлен для: Guest
Архив
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)


ISBN Онлайн: 978-1-56700-478-6

EFFECT OF RADIATION ON NATURAL CONVECTION IN A TRAPEZOIDAL CAVITY FILLED WITH POROUS MEDIUM SUBJECTED TO UNIFORM AND NON-UNIFORM TEMPERATURES AT BOTTOM WALL

DOI: 10.1615/IHMTC-2017.1100
pages 779-786

Dr.B. Aparna
Vemana I.T, Bangalore-34

K. N. Seetharamu
Department of Mechanical Engineering, PES University, 100 feet ring road, Bengaluru 560085, Karnataka, India

Аннотация

The current work is undertaken to analyze the movement of fluid and thermal energy due to uneven wall heating of a porous medium confined in a cavity. The emphasis is given to heating at bottom wall of the trapezoidal cavity with uniform and non-uniform temperature which leads to lesser amount of heat content at lower section of the porous medium and also to study effect of radiation. The boundary conditions are maintained in such a way to heat the bottom surface of the cavity unevenly with power law coefficient λ. The top horizontal surface of cavity is cold and two inclined walls are adiabatic. Current numerical scheme is based on finite element method that yields the solution to know the temperature and velocity distribution in the domain. It is found that the Nusselt number is generally higher in the middle portion of the cavity. With power law coefficient λ, the heat transfer rate found to increase continuously until around 50% of the cavity length and then starts to decrease. The average Nusselt number increases with increase in radiation parameter.