Natural convection inside square enclosure containing equilateral triangle with different orientations

Abstract EN

Natural convection heat transfer phenomenon in a square enclosure containing equilateral triangle cylinder on its centroid is numerically investigated.

Two dimensional for air (Pr=0.71) with outer cold walls of square enclosure and hot inner walls of the triangle cylinder by using CFD techniques is implemented.

(Ansys Fluent 16 ) is used to simulate this problem.

TheRayleigh number varied from 104 to 106 and orientation angles from 00 to 1050 step 150 for each case.

The laminar boussinesq approximation is used with the convergence criteria less than 10-5 for continuity, momentum and for energy equation 10-8.

Fluid and temperature are exhibited by stream and isothermal lines while heat transfer presented by the average Nusselt number.

According to orientation angle, results can be divided into two groups; (0o-45o) and (60o-105o).

Maximum heat transfer obtained at orientation angle of 300 and Ra=106.