Assessment of ForeFire/Meso-NH for wildland fire/atmosphere coupled simulation of the FireFlux experiment
Assessment of ForeFire/Meso-NH for wildland fire/atmosphere coupled simulation of the FireFlux experiment
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DOI：
10.1016/j.proci.2012.07.022
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发表时间：
2013-01-01
影响因子：
3.4
通讯作者：
Clements, Craig B.
中科院分区：
文献类型：
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作者：
Filippi, Jean-Baptiste;Pialat, Xavier;Clements, Craig B.
将非静力大涡模拟(MESO-NH)中尺度大气模式与ForeFire野火火区模拟器耦合的数值模拟结果与实验数据进行了比较，以评估该耦合方法在预测森林火灾动力学精细尺度特征方面的性能。MESO-NH是一种非静力、大涡模拟的大气研究模式。根据物理扩散速度模型，ForeFire通过在地球表面进化的拉格朗日标记确保了对火锋的前沿跟踪。大气模式通过地面风场强迫火灾行为，而火灾通过地面热通量和水汽通量边界条件强迫大气模拟。火流实验是一项32Ha的高草燃烧实验，使用风廓线和热电偶仪器，专门为估计野火引起的大气扰动而设计。将不同分辨率下的模拟结果与大尺度试验进行了比较，验证了所选择的耦合方法以及所选择的与中尺度大气模式相耦合的方法来预测野地火灾的传播。在耦合模拟和非耦合模拟之间模拟了不同的火灾传播行为。虽然模拟没有再现高频扰动，但结果表明，大气模式在行为和幅度方面很好地捕捉到了地面燃烧引起的大气扰动。(C)2012年，燃烧研究所。爱思唯尔公司出版，版权所有。
Numerical simulations using a coupled approach between Meso-NH (Non-Hydrostatic) LES (Large Eddy Simulation) mesoscale atmospheric model and ForeFire wildland fire area simulator are compared to experimental data to assess the performance of the proposed coupled approach in predicting fine-scale properties of the dynamics of wildland fires. Meso-NH is a non-hydrostatic, large eddy simulation capable, atmospheric research model. ForeFire insures a front tracking of the fire front by means of Lagrangian markers evolving on the earth's surface according to a physical rate-of-spread model. The atmospheric model forces the fire behavior through the surface wind field, whereas the fire forces the atmosphere simulation through surface boundary conditions of heat and vapor fluxes. The FireFlux experiment, an experimental 32 Ha burn of tall grass instrumented with wind profilers and thermocouples, was designed specifically to estimate the atmospheric perturbation introduced by wildland fire. Comparisons of the simulations at different resolutions with the large-scale experiment validate the chosen coupling methodology and the choice of a coupled approach with a meso-scale atmospheric model for the prediction of wildland fire propagation. Distinct fire propagation behavior is simulated between coupled and non-coupled simulation. While the simulations did not reproduce high frequency perturbations, it is shown that the atmospheric model captures well atmospheric perturbations induced by combustion at the ground level in terms of behavior and amplitude. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.