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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Numerical Simulation of Transport of Particles Emitted From Ground-Level Area Source Using Aermod and CFD
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Numerical Simulation of Transport of Particles Emitted From Ground-Level Area Source Using Aermod and CFD

机译：利用Aermod和CFD数值模拟地平面源排放的颗粒

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AbstractFugitive sources, including animal feeding operations, can contribute significantly to particulate pollution and cause environmental and health problems. Transport of particles emitted from these sources can be simulated using atmospheric dispersion models and computational fluid dynamics (CFD). This study evaluated the capability of AERMOD, the U.S. EPA preferred dispersion model, in modeling transport of particles emitted from area sources by comparing it to CFD. The two models responded similarly to effects of atmospheric stability and wind speed. AERMOD calculated lower downwind particle concentrations than CFD. In addition, predicted particle concentrations at locations downwind of the source remained constant with height in AERMOD but varied with height in CFD. Comparison of convection and diffusion rates simulated in CFD indicated that the assumptions on transport processes in AERMOD are suitable for modeling dispersion for area sources. However, estimated values for eddy diffusivity in cro...
机译：摘要包括动物饲养在内的逃逸来源可能对颗粒物污染产生重大影响，并造成环境和健康问题。可以使用大气扩散模型和计算流体动力学（CFD）模拟从这些源发出的粒子的传输。这项研究通过与CFD进行比较，评估了AERMOD（美国EPA首选的分散模型）在模拟从区域源发出的颗粒的传输过程中的能力。两种模型对大气稳定性和风速的响应相似。 AERMOD计算出的顺风颗粒浓度低于CFD。此外，在AERMOD中，源下风处的预测颗粒浓度随高度保持恒定，而在CFD中随高度变化。在CFD中模拟的对流和扩散速率的比较表明，在AERMOD中对传输过程的假设适合于模拟面源的扩散。但是，Cr的涡流扩散率估计值...

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