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A finite volume method to solve the Navier-Stokes equations for incompressible flows on unstructured meshes

机译:求解非结构网格上不可压缩流的Navier-Stokes方程的有限体积方法

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A method to solve the Navier-Stokes equations for incompressible viscous flows and the convection and diffusion of a scalar is proposed in the present paper. This method is based upon a fractional time step scheme and the finite volume method on unstructured meshes. A recently proposed diffusion scheme with interesting theoretical and numerical properties is tested and integrated into the Navier-Stokes solver. Predictions of Poiseuille flows, backward-facing step flows and lid-driven cavity flows are then performed to validate the method. We finally demonstrate the versatility of the method by predicting buoyancy force driven flows of a Boussinesq fluid (natural convection of air in a square cavity with Rayleigh numbers of 10{sup}3 and 10{sup}6).
机译:提出了求解不可压缩粘性流的Navier-Stokes方程以及标量的对流和扩散的方法。该方法基于分数时间步长方案和非结构化网格上的有限体积方法。测试了最近提出的具有有趣的理论和数值特性的扩散方案,并将其集成到Navier-Stokes求解器中。然后执行Poiseuille流量,后向步进流量和盖驱动腔流动的预测,以验证该方法。最后,我们通过预测浮力驱动的Boussinesq流体的流动(方形腔中空气的自然对流,瑞利数为10 {sup} 3和10 {sup} 6)证明了该方法的多功能性。

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