Direct Numerical Simulations of Chemically Reacting Turbulent Mixing Layers Using Higher-Order Method of Lines

Abstract

The results of direct numerical simulations are presented for turbulent mixing layers with chemical reactions using the higher-order method of lines. The reaction considered is a binary, single-step, irreversible reaction without heat release, so that the chemical reaction only depends on the flow field. We consider two cases, i. e., roll-up and pairing. In the roll-up case, the product field is similar to the flow field. In the pairing case, the product and the flow fields show similar behavior as in the roll-up case before the roll-up process. After that, the braid region is shown clearly in the product field, in comparison with the flow field. The chemical product is produced in the braid region and around the core region, and is concentrated in the core region.