Generalized maxwell velocity slip boundary model
Generalized maxwell velocity slip boundary model
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DOI：
10.1360/132011-827
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Haijun Zhang;Chang-sheng Zhu;Qin Yang;Z. Zhong
中科院分区：
文献类型：
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作者：
Haijun Zhang;Chang-sheng Zhu;Qin Yang;Z. Zhong
针对存在挤压速度的近连续体和滑移流区域的微型气体轴承气体流动，基于努森层动量和能量通量守恒，利用Grad 13矩近似的速度分布函数，详细推导了广义麦克斯韦速度滑移边界模型。研究表明，在忽略沿表面温度梯度和气流挤压速度的情况下，广义麦克斯韦速度滑移边界模型与典型麦克斯韦速度滑移模型是一致的。将模型应用到微型气体轴颈轴承的控制方程中,得到了微型气体轴颈轴承气固表面滑移速度边界的数学模型。
For the gas flow of micro gas bearings in the near continuum and slip flow region where the squeezing velocity exists,a generalized Maxwell velocity slip boundary model is derived in detail using the velocity distribution function from the Grad thirteen moment approximation based on the conservation of momentum and energy fluxes in the Knudsen layer.The research shows that the generalized Maxwell velocity slip boundary model is consistent with the typical Maxwell velocity slip model when the temperature gradient along the surface and the squeezing velocity of gas flow are neglected.By applying the model in the control equation for micro gas journal bearings,the mathematical model for the gas-solid surface slip velocity boundary in the micro gas journal bearings has been obtained.