一种用于自由表面流与结构物相互作用的新型流体体积法虚拟单元浸入边界方法
A novel volume of fluid ghost-cell immersed boundary method for free surface flow interacting with structures
AI总结：
本研究针对自由表面流与结构物相互作用问题，提出新型流体体积法虚拟单元浸入边界方法，通过正交边界处理、非正交效应修正及运动边界适配，基于OpenFOAM开发求解器，验证显示其能有效抑制扰动、准确捕捉流固耦合过程。
摘要：
本文提出了一种用于两相自由表面流与结构物相互作用的新型流体体积法虚拟单元浸入边界（IB）方法。为解决采用插值法进行变量重构时，浸入边界与自由表面相交区域周围出现的扰动问题，研究首先通过模拟贴体网格法中的边界条件施加方式，结合正交浸入边界考虑流固耦合作用。随后开展处理以考量精确模拟流固耦合（FSI）中的非正交效应，包括新提出的通量缩放法和浸入边界速度重估方法。此外，还采用了变量平滑过程和通量修正方法来处理运动边界情形。基于OpenFOAM开发了一款两相流求解器，分别采用静止和运动浸入边界算例进行验证。数值结果与相应的实验室数据及其他数值模拟结果吻合良好，表明该方法有效抑制了扰动，且求解器在捕捉含自由表面流的流固耦合作用方面具有准确性。
英文摘要：
This paper presents a novel volume of fluid ghost-cell immersed boundary (IB) method for two-phase free surface flow interacting with structures. To circumvent the disturbance occurring around the intersection area of the IB and free surface when using the interpolation method for variable reconstruction, the fluid-structure interaction is firstly considered with the orthogonal IB by mimicking the imposition of boundary conditions in the body-conformal grid method. Treatments are subsequently performed to account for the non-orthogonal effect in accurately simulating the FSI, including the newly proposed flux-scaling and IB velocity re-evaluation methods. Further, a variable smoothing process and a flux correction method are adapted to handle moving boundary cases. Based on OpenFOAM, a two-phase flow solver has been developed. Both stationary and moving immersed boundary cases are used for validations. The numerical results reasonably agree with the corresponding laboratory data and other numerical simulation results, demonstrating the disturbance being effectively depressed and the solver's accuracy in capturing fluid-structure interactions involving free surface flow.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
