论文标题
与单相运输方案的不可压缩多相电流动流的直接数值模拟
Direct numerical simulations of incompressible multiphase electrohydrodynamic flow with single-phase transportation schemes
论文作者
论文摘要
在本研究中，提出了两种名为“面部识别”和通量校正的方案，以实现多相电水动力学（EHD）问题中的自由电荷的单相运输。由于空气不良导致的欧姆传导和对流，空气和另一种液体之间发生了许多EHD现象，而自由电荷只能在液相运输。但是，由于界面和自由电荷之间的异步运输，该电荷在模拟过程中可能会泄漏到介电空气中。为了避免这种非物理误差，通过在界面上提供出色的物理特性分布来产生面部识别方法，以产生自由电荷的准确传导。随后开发了通量校正方法，以校正电荷密度的对流通量，以防止离子越过界面。这两个方案基于流体（VOF）模型的体积，并独立于特定的接口更新方法。通过几个测试用例仔细验证了所提出的方法的性能。该算法作为OpenFOAM扩展实现，并作为开源发表。
In the present study, two schemes named face discernment and flux correction are proposed to achieve single-phase transportation of free charge in multiphase electrohydrodynamic(EHD) problems. Many EHD phenomena occur between air and another liquid while the free charge can only be transported in the liquid phase through ohmic conduction and convection due to the poor conductivity of air. However, the charge may be leaked into the dielectric air during the simulation due to the asynchronous transportation between interface and free charge. To avoid this unphysical error, a face discernment method is designed to produce an accurate ohmic conduction of free charge by providing a superior physical properties distribution at the interface. Subsequently the flux correction method is developed to correct the advection flux of charge density to prevent ions crossing the interface. These two schemes are based on the Volume of Fluid (VOF) model and independent with the specific interface updating method. The performance of the proposed methods are carefully validated with several test cases. The algorithms are implemented as an OpenFOAM extension and are published as open source.
