| DOI: | 10.2172/1040022
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| 报告号: | LA-UR-12-21165
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| 报告题名: | Code Verification of the HIGRAD Computational Fluid Dynamics Solver |
| 作者: | Van Buren, Kendra L. [Los Alamos National Laboratory]; Canfield, Jesse M. [Los Alamos National Laboratory]; Hemez, Francois M. [Los Alamos National Laboratory]; Sauer, Jeremy A. [Los Alamos National Laboratory]
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| 出版年: | 2012
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| 发表日期: | 2012-05-04
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| 国家: | 美国
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| 语种: | 英语
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| 中文主题词: | 山火
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| 主题词: | WILDFIRES
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| 英文摘要: | The purpose of this report is to outline code and solution verification activities applied to HIGRAD, a Computational Fluid Dynamics (CFD) solver of the compressible Navier-Stokes equations developed at the Los Alamos National Laboratory, and used to simulate various phenomena such as the propagation of wildfires and atmospheric hydrodynamics. Code verification efforts, as described in this report, are an important first step to establish the credibility of numerical simulations. They provide evidence that the mathematical formulation is properly implemented without significant mistakes that would adversely impact the application of interest. Highly accurate analytical solutions are derived for four code verification test problems that exercise different aspects of the code. These test problems are referred to as: (i) the quiet start, (ii) the passive advection, (iii) the passive diffusion, and (iv) the piston-like problem. These problems are simulated using HIGRAD with different levels of mesh discretization and the numerical solutions are compared to their analytical counterparts. In addition, the rates of convergence are estimated to verify the numerical performance of the solver. The first three test problems produce numerical approximations as expected. The fourth test problem (piston-like) indicates the extent to which the code is able to simulate a 'mild' discontinuity, which is a condition that would typically be better handled by a Lagrangian formulation. The current investigation concludes that the numerical implementation of the solver performs as expected. The quality of solutions is sufficient to provide credible simulations of fluid flows around wind turbines. The main caveat associated to these findings is the low coverage provided by these four problems, and somewhat limited verification activities. A more comprehensive evaluation of HIGRAD may be beneficial for future studies. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1040022
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/40663
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1040022.pdf（2340KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Van Buren, Kendra L. [Los Alamos National Laboratory],Canfield, Jesse M. [Los Alamos National Laboratory],Hemez, Francois M. [Los Alamos National Laboratory],et al. Code Verification of the HIGRAD Computational Fluid Dynamics Solver. 2012-01-01.
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