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Pressure correction-based iterative scheme for navier-stokes equations using nodal integral method

机译:节点积分法的航海方程基于压力修正的迭代方案

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摘要

A novel numerical scheme is developed for steady-state, 2-D incompressible Navier-Stokes equations using the nodal integral method (NIM). The NIM-based schemes have been used to solve partial differential equations in different areas of physics and are known to have very high accuracy compared to conventional numerical schemes. The scheme is implemented using a SIMPLE (Semi-Implicit Method for Pressure-Linked Equations)-like algorithm for pressure and velocity correction instead of solving the exact pressure Poisson equation. To verify the results, two well-known test problems, the lid-driven cavity and natural convection of air in a square cavity, are chosen. For both cases, results are in good agreement with the benchmark solutions even for quite coarse grids.
机译:使用节点积分法(NIM),为稳态二维不可压缩Navier-Stokes方程开发了一种新颖的数值方案。基于NIM的方案已用于解决物理不同领域中的偏微分方程,并且与常规数值方案相比,已知具有很高的精度。该方案是使用类似于SIMPLE(压力链接方程的半隐式方法)的算法来实现压力和速度校正的,而不是求解精确的压力泊松方程。为了验证结果,选择了两个众所周知的测试问题,即盖驱动腔和方腔中空气的自然对流。对于这两种情况,即使对于相当粗糙的网格,结果也与基准解决方案非常吻合。

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