PRESSURE-VELOCITY FORMULATION TO STUDY THE EFFECT OF PROTUBERANCE ON THERMAL CONVECTION BY FINITE ELEMENT METHOD

摘要

In the present paper the analyses of heat transfer and free convective motion have been carried out numerically for a semi-cylindncally shaped protuberance in a square enclosure. The solution method is based on the finite element technique with the frontal solver. The numerical results are for a Prandtl number 0.71 and for Rayleigh number up to 10~5. The change in the direction of the returning fluid near the cold wall, due to the presence of protuberance at the bottom, results higher convective current. Increase in protuberance results the maximum velocities in the domain and creates dead zones near the bottom corners of the enclosures.