Mixed Convection in an Horizontal Rectangular Duct lncluding interior Circular Core With Time Periodic Boundary Condition | ||
| Iraqi Journal of Chemical and Petroleum Engineering | ||
| Article 1, Volume 10, Issue 4, December 2009, Pages 27-38 | ||
| Author | ||
| Manal H. AL-Hafidh | ||
| Abstract | ||
| Numerical investigation was done for steady state laminar mixed convection and thermally and hydrodynarnic f developed flow through horizontal rectangular duct including circular core with two cases of time periodic boundary condition, first case on the rectangular wall while keeping Gore wall constant and other on both the rectangular duet and core walls. The used govenilng equations are continu4y, momentum and energy equations. These equations are normalized and solved using the Vorticity-Stream function and the Body Fitted Coordinates (HF C) methods. The finite d4fference approach with the Line Successive Over-Relaxation (LSOR) method is used to obtain all the computational results. The (BEC) method is used to generate the grid of the problem. A computer program (Fonran 90) is built to calculate the Nusselt number (I/u) in steady state. The fluid Prandtl number is 0.7, Rayleigh number (1 Reynolds number (IsRes2000f For the range of parameters considered results show that the time periodic boundary condition enhance heat transfer. It is also indicated in the results that heat transfer from the surface of the circle exceeds that of the rectangle duct. Comparisons with other researches show good agreement. | ||
| Keywords | ||
| mixed convection; Radiation; rectangular duct; circular core; laminar flow; time periodic boundary condition | ||
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