Research Initiation Award: Differential Diffusion and Interscale Spectral Transfer of Multiple Scalars in Turbulent Mixing

在一项研究启动奖的资助下，将对热和化学物质的湍流传输进行数值模拟。问题是微分扩散，在微分扩散中，分子的热量、物质和动量的传递速率是不同的。在存在湍流的情况下，这些微分扩散效应是重要的，但人们对其了解甚少，研究也很少。该方法是基于谱法的直接数值模拟。该研究对紊流燃烧和反应器中化学物质的混合具有一定的应用价值。

Funded under a Research Initiation Award, numerical simulations will be carried out of the turbulent transport of both heat and chemical species. The issue is differential diffusion, in which the molecular transport rates of heat, species, and momentum are different. In the presence of turbulence, these differential diffusion effects are important but poorly understood and little investigated. The approach is via Direct Numerical Simulations based on spectral methods. The research has application to turbulent combustion, and mixing of chemical species in reactors.