The FOSS CFD-SPH code SPHERA v.9.0.0 (RSE SpA) is improved to deal with “fluid–solid body” interactions under no-slip conditions and laminar regimes for the simulation of hydrodynamic lubrication. The code is herein validated in relation to a uniform slider bearing (i.e. for a constant lubricant film depth) and a linear slider bearing (i.e. for a film depth with a linear profile variation along the main flow direction). Validations refer to comparisons with analytical solutions, herein generalized to consider any Dirichlet boundary condition. Further, this study allows a first code validation of the “fluid–fixed frontier” interactions under no-slip conditions. With respect to the most state-of-the-art models (2D codes based on Reynolds’ equation for fluid films), the following distinctive features are highlighted: (1) 3D formulation on all the terms of the Navier–Stokes equations for incompressible fluids with uniform viscosity; (2) validations on both local and global quantities (pressure and velocity profiles; load-bearing capacity); (3) possibility to simulate any 3D topology. This study also shows the advantages of using a CFD-SPH code in simulating the inertia and 3D effects close to the slider edges, and it opens new research directions overcoming the limitations of the codes for hydrodynamic lubrication based on the Reynolds’ equation for fluid films. This study finally allows SPHERA to deal with hydrodynamic lubrication and improves the code for other relevant application fields involving fluid–structure interactions (e.g. transport of solid bodies by floods and earth landslides; rock landslides). SPHERA is developed and distributed on a GitHub public repository.

FOSS CFD-SPH代码SPHERA v.9.0.0（RSE SpA）进行了改进，以处理在无滑移条件和层流状态下的“流体-固体”相互作用，以模拟流体动力润滑。本文中的代码针对均匀的滑动轴承（即，用于恒定的润滑膜深度）和线性滑动轴承（即，用于沿主流方向具有线性轮廓变化的膜深度）进行验证。验证是指与分析解决方案的比较，在此可以概括为考虑任何Dirichlet边界条件。此外，这项研究允许在无滑移条件下对“流体固定边界”相互作用进行第一个代码验证。关于最先进的模型（基于雷诺兹流体薄膜方程的2D代码），突出了以下鲜明特征：（1）在Navier–Stokes方程的所有项上对粘度均匀的不可压缩流体进行3D表示；（2）验证本地和全局数量（压力和速度曲线；承载能力）；（3）可以模拟任何3D拓扑。这项研究还显示了使用CFD-SPH代码来模拟靠近滑块边缘的惯性和3D效果的优势，并且它为克服基于流体膜的雷诺方程的流体动力润滑法的局限性开辟了新的研究方向。 。这项研究最终使SPHERA能够处理流体动力润滑，并改进了涉及流体-结构相互作用（例如，洪水和土质滑坡运输固体，岩石滑坡）的其他相关应用领域的规范。