网格精度对山区地形气体泄漏CFD模拟影响的研究
首发时间:2011-08-31
摘要:主要探讨实际山区地形三维模型所划分网格的精度对气体泄漏模拟结果的影响。以普光某气田为例建立三维模型,运用数值模拟和流体力学的理论,根据山区地形风场模拟和气体泄漏模拟的要求,划分出疏密程度不相同的网格。运用fluent软件,模拟精密网格和粗糙网格对山区地形风场试算和气体泄漏结果的影响,得到山区地形气体泄漏的模拟对网格具有很大依赖性的结论。以上研究对今后山区地形气体泄漏的模拟具有参考价值,也为实际管道输送中的天然气泄漏提供了理论依据。
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The study of grid precision affecting on CFD simulation in mountain terrain
Abstract:The three-dimensional model of the grid meshing methods in the actual surface of the mountain terrain were discussed in this paper. Establish the three-dimensional model based on some gas field of Puguang. Using numerical simulation and fluid mechanics theory, according to the request of the wind field simulation and mountain terrain LNG leakage trial at the mountain terrain special surface, get the grids of different density. Using fluent , simulate a refined gird and a coarse gird to the mountain terrain wind field trial and mountain terrain gas leakage trial, gained the result that it is highly depending on the grid. The research has reference value to the simulation at the gas leakage in mountain terrain special surface in the future, it also provide evidence to the actual leakge of gas in the pipe.
Keywords: CFD Grid Grid precision Complex terrain turbulence boundary condition
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