عنوان المقالة:الحمل المختلط المغناطيسي في فجوه متوازيه الاضلاع CHARACTERISTICS OF MAGNETOHYDRODYNAMIC MIXED CONVECTION IN A PARALLEL MOTION TWO-SIDED LID- DRIVEN DIFFERENTIALLY HEATED PARALLELOGRAMMIC CAVITY WITH VARIOUS SKEW ANGLES
A numerical study is presented for mixed convection flow
of air (Pr=0.71) within a parallel motion two sided lid-driven
parallelogrammic cavity in the presence of magnetic field. The
left and right lid-driven sidewalls of the parallelogrammic
cavity are maintained at isothermal hot and cold temperatures
respectively and slide from bottom to top in upward parallel
direction with a uniform lid-driven velocity. A magnetic field of
strength (Box) is subjected in the horizontal direction. The
horizontal walls of the cavity are considered thermally
insulated. The finite volume method has been used to solve the
governing Navier–Stokes and energy conservation equations of
the fluid medium in the parallelogrammic cavity in order to
investigate the effect of magnetic field on the flow and heat
transfer for various values of Richardson number, skew angle
and Hartmann number. The values of the governing parameters
are the Hartmann number (0 ≤ Ha ≤ 75), Richardson number
(0.01≤ Ri ≤100) and skew angle (- 60° ≤ Φ ≤ 60°). The present
numerical approach is found to be consistent and the results is
presented in terms of streamlines and isotherm contours in
addition with the average Nusselt number. It is found that as the
Hartmann number increases the circulation of the rotating
vortices is reduced and the conduction mode of heat transfer is
dominant. Also, it is found that both Richardson number and
direction of two sided lid-driven sidewalls affect the heat
transfer and fluid flow in the parallelogrammic cavity.
الاستاذ الدكتور احمد كاظم حسين | Prof.Dr. Ahmed Kadhim Hussein | 5723