Abstract This work presents a simple model of the flow generated in microchannels when the upper lid has a vertical deformation that depends on time and space. This model is able to capture the dynamics of the flow generated for two fundamental cases: full displacement of the upper lid and the flow generated by an impactor. The results for these cases have been compared with full 3D simulations with a moving mesh and experiments providing very accurate results. Once the model is validated, it is used for the analysis of the effect of the different parameters that control the flow, and for providing general laws for the non-dimensional energy consumed up to a time t 0 in which the microchannel reaches half of its initial height. Finally, it is demonstrated that the general laws obtained for the non-dimensional energy are fully independent of the closing laws used.

中文翻译：

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模拟冲击载荷下微通道内的流体流动

摘要 这项工作提出了当上盖具有取决于时间和空间的垂直变形时在微通道中产生的流动的简单模型。该模型能够捕捉在两种基本情况下产生的流动动力学：上盖的完全位移和撞击器产生的流动。这些案例的结果与使用移动网格的全 3D 模拟进行了比较，实验提供了非常准确的结果。一旦模型得到验证，它就被用于分析控制流动的不同参数的影响，并为微通道达到其一半的时间 t 0 消耗的无量纲能量提供一般规律。初始高度。最后，