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首页> 外文期刊>Mathematical Problems in Engineering >A Simple Immersed Boundary Method for Compressible Flow Simulation around a Stationary and Moving Sphere
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A Simple Immersed Boundary Method for Compressible Flow Simulation around a Stationary and Moving Sphere

机译：固定和运动球体附近可压缩流模拟的简单浸入边界方法

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摘要

This study is devoted to investigating a flow around a stationary or moving sphere by using direct numerical simulation with immersed boundary method (IBM) for the three-dimensional compressible Navier-Stokes equations. A hybrid scheme developed to solve both shocks and turbulent flows is employed to solve the flow around a sphere in the equally spaced Cartesian mesh. Drag coefficients of the spheres are compared with reliable values obtained from highly accurate boundary-fitted coordinate (BFC) flow solver to clarify the applicability of the present method. As a result, good agreement was obtained between the present results and those from the BFC flow solver. Moreover, the effectiveness of the hybrid scheme was demonstrated to capture the wake structure of a sphere. Both advantages and disadvantages of the simple IBM were investigated in detail.
机译：这项研究致力于通过对三维可压缩Navier-Stokes方程使用浸入边界方法（IBM）进行直接数值模拟来研究围绕固定或运动球体的流动。为解决激波和湍流问题，开发了一种混合方案来解决等距笛卡尔网格中球体周围的流动问题。将球的阻力系数与从高精度边界拟合坐标（BFC）流量求解器获得的可靠值进行比较，以阐明本方法的适用性。结果，在当前结果和来自BFC流量求解器的结果之间获得了良好的一致性。此外，混合方案的有效性被证明可以捕获球体的尾迹结构。简单地研究了简单IBM的优缺点。

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