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首页> 外文期刊>International Journal for Numerical Methods in Engineering >A numerical method for the analysis of flexible bodies in unsteady viscous flows
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A numerical method for the analysis of flexible bodies in unsteady viscous flows

机译:非定常粘性流中弹性体分析的数值方法

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摘要

A two-dimensional numerical model for unsteady viscous flow around flexible bodies is developed. Bodies are represented by distributed body forces. The body force density is found at every time-step so as to adjust the velocity within the computational cells occupied by the body to a prescribed value. The method combines certain ideas from the immersed boundary method and the volume of fluid method. The main advantage of this method is that the computations can be effected on a Cartesian grid, without having to fit the grid to the body surface. This is particularly useful in the case of flexible bodies, in which case the surface of the object changes dynamically, and in the case of multiple bodies moving relatively to each other.
机译:建立了绕粘性体非定常粘性流动的二维数值模型。身体以分散的身体力量为代表。可以在每个时间步长上找到体力密度,以便将身体所占据的计算单元内的速度调整到指定值。该方法结合了沉浸边界方法和流体体积方法的某些思想。这种方法的主要优点是可以在笛卡尔网格上进行计算,而不必将网格拟合到身体表面。这在挠性物体的情况下特别有用,在这种情况下,物体的表面会动态变化,而在多个物体彼此相对运动的情况下。

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