Numerical Investigation of Rarefied Diatomic Gas Flow and Heat Transfer in a Microchannel Using DSMC with Uniform Heat Flux Boundary Condition—Part II: Applications
Numerical Investigation of Rarefied Diatomic Gas Flow and Heat Transfer in a Microchannel Using DSMC with Uniform Heat Flux Boundary Condition—Part II: Applications
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使用具有均匀热通量边界条件的 DSMC 对微通道中的稀薄双原子气体流动和传热进行数值研究 - 第二部分：应用
DOI：
10.1080/10407790701703401
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Yining Wu
中科院分区：
文献类型：
--
作者：
Qiuwan Wang;Cunlu Zhao;M. Zeng;Yining Wu
在本文的第一部分（Part I）中，我们提出并验证了DSMC-HFS方法，该方法可用于DSMC模拟中热流指定边界条件的处理。在本文中，该方法被应用于演示稀薄双原子气体在均匀热流边界条件下的微通道流动的一般性质。数值模拟了壁面热流密度对气相流动和换热特性的影响，并进行了详细讨论。结果表明，随着壁面热流密度的增加，气体的稀薄度和压缩性增加。高壁面热流密度下气体加速比低壁面热流密度下明显。高的壁面热流密度降低了通道的质量流量，提高了通道的换热能力，但通道入口处的换热能力不高。
In the first part of this work (Part I), we presented and validated the DSMC-HFS method, which can be used to deal with heat flux specified boundary conditions in DSMC simulations. In this article, the method is applied to demonstrate the general properties of rarefied diatomic gaseous flow in a microchannel under uniform heat flux boundary conditions. The effects of wall heat flux on gaseous flow and heat transfer characteristics are investigated numerically and discussed in detail. It can be concluded from the present research that gaseous rarefication and compressibility increase with the increase of the wall heat flux. Gas acceleration at higher wall heat flux is more obvious than that at lower wall heat flux. The high wall heat flux reduces the mass flow rate and elevates the heat transfer ability except at the channel inlet.