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首页> 外文期刊>International Journal of Heat and Mass Transfer >The effects of acoustic streaming on thermal convection in an enclosure with differentially heated horizontal walls
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The effects of acoustic streaming on thermal convection in an enclosure with differentially heated horizontal walls

机译：声流对带有水平加热壁的机壳中热对流的影响

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摘要

The effects of classical and irregular streaming motion on convective heat transfer in air-filled shallow enclosures carrying a standing sound wave are investigated. The fluid motion is driven by the periodic vibration of the enclosure left wall. The vertical walls of the enclosure are adiabatic while the horizontal walls are heated differentially. The fully compressible form of the Navier-Stokes equations are considered to compute the oscillatory and mean flow fields. A control-volume method based, explicit time-marching Flux-Corrected Transport (FCT) Algorithm is used to simulate the transport phenomena in the enclosure. The simulation results of a test case for an unheated enclosure are compared with the existing literature for code validation. Transverse temperature gradient strongly affects the acoustic streaming structures and velocities. The streaming motion significantly enhances overall heat transfer from the bottom wall compared to pure conduction. Enhancement is more pronounced in the presence of irregular streaming.
机译：研究了经典的和不规则的流动运动对带有声波的充气浅室中对流换热的影响。流体运动是由外壳左壁的周期性振动驱动的。外壳的垂直壁是绝热的，而水平壁则被不同程度地加热。 Navier-Stokes方程的完全可压缩形式被认为可以计算振荡流和平均流场。基于控制量方法的显式时间行进磁通校正输运（FCT）算法用于模拟机柜中的输运现象。将未加热外壳的测试用例的仿真结果与现有文献进行比较，以进行代码验证。横向温度梯度强烈影响声流结构和速度。与纯传导相比，流动运动显着增强了从底壁传出的总热量。在存在不规则流的情况下增强更加明显。

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