MIXED CONVECTION IN PERIODIC OPEN CAVITIES WITH OSCILLATORY THROUGHFLOW
MIXED CONVECTION IN PERIODIC OPEN CAVITIES WITH OSCILLATORY THROUGHFLOW
复制标题
具有振荡通流的周期性开腔中的混合对流
DOI：
10.1080/10407789608913777
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发表时间：
1996
影响因子：
2
通讯作者：
T. Fusegi
中科院分区：
文献类型：
--
作者：
T. Fusegi
本文对脉动压力梯度作用下通道内空气（Pr = 0.7）充分发展流动的混合对流进行了数值研究。通道的下壁被周期性地开槽以形成方形空腔，从底部均匀地加热。以下三个相关参数是控制方程适当无量纲化的结果：Re，振荡流雷诺数（基于振荡速度尺度）; Wo，沃默斯利数;和Grq，修改后的格拉肖夫数。在低Re范围（10 < Re < 100），流动特性对Wo和/或Grq的微小变化敏感，这是本研究的主要兴趣。当浮力效应被忽略时，循环滚动单元出现在空腔内，它几乎在整个循环中保持不变。然而，这种涡流的形成不会发生在混合对流模式下;这种差异源于通流对空腔的更深渗透。H...
Abstract Mixed convection in fully developed flows of air (Pr = 0.7) inside a channel subjected to oscillatory pressure gradients is studied numerically. The lower wall of the channel is periodically grooved to form square cavities, which are heated uniformly from the bottom. The following three pertinent parameters evolve as a result of the proper nondimensionalization of the governing equations: Re, the oscillatory flow Reynolds number (based on an oscillation velocity scale); Wo, the Womersley number; and Grq, a modified Grashof number. A low-Re range (10 < Re < 100), in which the flow properties are sensitive to small changes in Wo and / or Grq, is of primary interest in the present investigation. When the buoyancy effect is neglected, a circulatory roll cell appears inside the cavity, which remains over almost the entire cycle. However, the formation of such a vortex does not take place with the mixed convection mode; this difference stems from a deeper penetration of the throughflow to the cavity. H...