Advanced modelling of lubricated interfaces in general curvilinear grids
Advanced modelling of lubricated interfaces in general curvilinear grids
复制标题
一般曲线网格中润滑界面的高级建模
DOI：
10.1016/j.triboint.2023.108727
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发表时间：
2023
影响因子：
6.2
通讯作者：
Ardah S
中科院分区：
文献类型：
--
作者：
Ardah S
解决涉及复杂表面几何形状的流体流动问题已经成为大量旨在适应弯曲复杂边界的数值研究的催化剂。一个例子是贴体曲线坐标变换的应用，其中实现了从物理域中的非正交曲线网格到计算域中的正交网格的网格点的一一对应。在润滑界面中，由于映射网格中控制方程的复杂性、非线性所表现出的数值不稳定性以及操作条件的严重性，这种转换具有挑战性。本贡献提出了一个基于Solders的，有限体积的流体-结构相互作用（FSI）的框架，用于解决热弹性流体动力润滑（TEHL）问题映射到正交网格在计算域中。我们演示了如何强守恒形式的相关控制方程可以表示在三维曲线网格和离散使用有限体积法，以确保流体流量守恒和执行质量守恒空化条件。数值和实验基准展示了所提出的框架的鲁棒性和多功能性，以模拟各种各样的润滑问题，从而实现预测计算工具，使转向摩擦学感知设计。
Tackling fluid-flow problems involving intricate surface geometries has been the catalyst for a plethora of numerical investigations aimed at accommodating curved complex boundaries. An example is the application of body-fitted curvilinear coordinate transformation, where the one-to-one correspondence of grid points from a non-orthogonal curvilinear grid in the physical domain to an orthogonal grid in the computational domain is achieved. In lubricated interfaces, such conversion is challenging due to the complexity of the governing equations in the mapped-grid, the numerical instabilities exhibited by their non-linearities and the severity of the operating conditions. The present contribution proposes a Reynolds-based, finite volume fluid–structure interaction (FSI) framework for solving thermal elastohydrodynamic lubrication (TEHL) problems mapped onto orthogonal grids in the computational domain. We demonstrate how the strong conservation form of the pertinent governing equations can be expressed in three-dimensional curvilinear grids and discretised using the finite volume method to ensure fluid-flow conservation and enforce mass-conserving cavitation conditions. Numerical and experimental benchmarks showcase the robustness and versatility of the proposed framework to simulate a diverse range of lubrication problems, hence achieving a predictive computational tool that would enable a shift towards tribology-aware design.