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Velocity dependent Maxwell boundary conditions in DSMC

机译:DSMC中取决于速度的麦克斯韦边界条件

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Recently Struchtrup (2013) proposed an extension to the original Maxwell boundary conditions for the Boltzmann equation which introduces velocity dependent accommodation coefficients. These boundary conditions are implemented into the direct simulation Monte Carlo (DSMC) method. The effect of the velocity dependent Maxwell (VDM) boundary conditions on thermal transpiration phenomena is studied for two-dimensional micro-cavities. Variation of the three microscopic parameters provided by the VDM boundary condition yields changes in slip velocity, temperature jump and the thermal transpiration effect. The results indicate that the strength of thermal transpiration can change and, depending on the values of the coefficients, the rarefied flow can be driven from warmer toward colder regions.
机译:最近,Struchtrup(2013)为玻尔兹曼方程提出了原始麦克斯韦边界条件的扩展,引入了速度相关的适应系数。这些边界条件被实现为直接模拟蒙特卡洛(DSMC)方法。针对二维微腔研究了速度依赖性麦克斯韦(VDM)边界条件对热蒸腾现象的影响。 VDM边界条件提供的三个微观参数的变化会导致滑移速度,温度跃变和热蒸腾效应的变化。结果表明,热蒸腾的强度可以改变,并且取决于系数的值,稀薄流可以从较暖的区域流向较冷的区域。

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