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首页> 外文期刊>International Journal of Heat and Mass Transfer >Unsteady double diffusive convection in an inclined rectangular lid-driven enclosure with different magnetic field angles and non-uniform boundary conditions
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Unsteady double diffusive convection in an inclined rectangular lid-driven enclosure with different magnetic field angles and non-uniform boundary conditions

机译：具有不同磁场角和边界条件不均匀的矩形盖驱动的倾斜矩形罩中的非定常双扩散对流

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摘要

The effect of buoyancy ratio on an unsteady double diffusive natural convection flow in an inclined lid-driven enclosure with different magnetic field angles is studied. The enclosure is non-uniformly heated and concentrated from the bottom side and uniformly heated and concentrated from the left vertical side. The right vertical wall is insulated and the top wall is cooled. The top wall moves in the positive direction with a constant speed from left to right. The governing equations have been solved numerically using the staggered grid finite-difference method to obtain streamlines, isotherms, iso-concentrations, average Nusselt and Sherwood numbers for various values of the buoyancy ratio and different magnetic field angles for three different cavity inclination angles. The results indicate that the flow pattern, temperature and concentration fields are significantly depend on the magnetic field and cavity inclination angles. It was found that different angles of the magnetic field may suppress the convection flow and that the direction of the magnetic field influences the flow pattern. Computations of the average Nusselt numbers at the left hot wall are made and these compare favorably with previously published results. The change in streamline, isotherm and iso-concentration patterns with time is described here.
机译：研究了浮力比对具有不同磁场角的倾斜盖驱动罩壳内非定常双扩散自然对流的影响。从底面对外壳进行不均匀加热和浓缩，从左侧垂直面对外壳进行均匀加热和浓缩。右垂直壁已绝缘，顶壁已冷却。顶壁以恒定的速度从左向右移动。使用交错网格有限差分法对控制方程进行了数值求解，以针对三种不同的腔体倾角获得各种浮力值和不同磁场角的流线，等温线，等浓度，平均Nusselt和Sherwood数。结果表明，流场，温度和浓度场显着取决于磁场和腔体倾斜角。已经发现，不同角度的磁场可以抑制对流流动，并且磁场的方向会影响流动模式。对左热墙处的平均Nusselt数进行了计算，与以前发表的结果相吻合。此处描述了流线，等温线和等浓度模式随时间的变化。

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