Abstract Radiometric plates have potential applications in aerospace science and technology. The radiometric force acting on a circular thin plate with surface temperatures much higher than the environment was studied with the aid of direct simulation Monte Carlo (DSMC). Dimensional analysis showed that the scaled radiometric force depended on the scaled temperatures of both sides of the plate and the Knudsen number. Statistical analysis of the gas–plate interactions demonstrated that the gas around the plate was in a thermal non-equilibrium state. The radiometric force acting on the plate could change its direction along the radius for small Knudsen numbers, which was thought to be a combined effect of rarefied and continuum flow. Furthermore, a dimensionless expression was proposed for the radiometric force for a wide a range of surface temperatures and for radius-based Knudsen numbers equal to or larger than 0.05. The radiometric force varied non-linearly with the temperature difference, and dependence of the radiometric force on the perimeter and the mean free path for small Knudsen numbers was between those predicted by the theories of Einstein and Sexl. This work improves the understanding of radiometric flow at small Knudsen numbers and can be applied to aerospace technology.

中文翻译：

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DSMC 研究作用在表面温度远高于环境温度的薄板上的辐射力

摘要 辐射板在航空航天科学技术中具有潜在的应用价值。借助直接模拟蒙特卡罗 (DSMC) 研究了作用在表面温度远高于环境温度的圆形薄板上的辐射力。尺寸分析表明，缩放辐射力取决于板两侧的缩放温度和克努森数。气体-板相互作用的统计分析表明，板周围的气体处于热非平衡状态。对于小克努森数，作用在板上的辐射力可以沿半径改变方向，这被认为是稀薄和连续流的综合效应。此外，对于广泛的表面温度范围和基于半径的 Knudsen 数等于或大于 0.05 的辐射力，提出了一个无量纲表达式。辐射力随温差呈非线性变化，辐射力对周长和小克努森数平均自由程的依赖性介于爱因斯坦和塞克尔理论预测的之间。这项工作提高了对小克努森数辐射流的理解，并可应用于航空航天技术。辐射力对周长和小克努森数的平均自由程的依赖性介于爱因斯坦和塞克尔理论预测的那些之间。这项工作提高了对小克努森数辐射流的理解，并可应用于航空航天技术。辐射力对周长和小克努森数的平均自由程的依赖性介于爱因斯坦和塞克尔理论预测的那些之间。这项工作提高了对小克努森数辐射流的理解，并可应用于航空航天技术。