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基于OpenFOAM的城市街区毒气扩散模拟

陈存杨 朱勇兵 陈崇成 王 巍 巫建伟

陈存杨, 朱勇兵, 陈崇成, 王 巍, 巫建伟. 基于OpenFOAM的城市街区毒气扩散模拟[J]. 环境科学研究, 2015, 28(5): 697-703.
引用本文: 陈存杨, 朱勇兵, 陈崇成, 王 巍, 巫建伟. 基于OpenFOAM的城市街区毒气扩散模拟[J]. 环境科学研究, 2015, 28(5): 697-703.
CHEN Cunyang, ZHU Yongbing, CHEN Chongcheng, WANG Wei, WU Jianwei. Simulation of Toxic Gas Diffusion in Complex Urban Blocks Based on OpenFOAM[J]. Research of Environmental Sciences, 2015, 28(5): 697-703.
Citation: CHEN Cunyang, ZHU Yongbing, CHEN Chongcheng, WANG Wei, WU Jianwei. Simulation of Toxic Gas Diffusion in Complex Urban Blocks Based on OpenFOAM[J]. Research of Environmental Sciences, 2015, 28(5): 697-703.

基于OpenFOAM的城市街区毒气扩散模拟

基金项目: 国家科技支撑计划项目(2013BAH28F00);福建省科技计划项目(2010I0008,0HZ0004-1);装备预演项目(40407020602)

Simulation of Toxic Gas Diffusion in Complex Urban Blocks Based on OpenFOAM

  • 摘要: 为了对毒气扩散过程进行及时、有效的模拟,将开源计算流体动力学软件OpenFOAM与PISO算法(pressure implicit with splitting of operators,压力隐式算子分割算法)相结合,进行城市街区毒气扩散模拟研究. 将SIMPLE(semi-implicit method for pressure linked equations,压力耦合方程组的半隐式算法)与PISO算法进行了对比,指出以PISO算法为基础的数值模拟在城市街区这类大范围毒气扩散模拟中具有容差性强、计算较为稳定等优点. 以福州大学怡山校区为扩散区虚拟地理环境,选用氯气为假定毒气,利用OpenFOAM对氯气的扩散传播过程进行了模拟, 并与商用软件FLUENT在相同条件下的ρ(Cl2)模拟结果进行了对比. 结果表明,结合PISO算法的OpenFOAM能够较好地完成复杂虚拟地理环境下的毒气扩散过程模拟,其ρ(Cl2)模拟结果与FLUENT模拟结果的平均偏差小于5%,但在计算效率上却提高了41.89%.

     

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  • 刊出日期:  2015-05-25

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