Adaptive Interface Capturing Approach for Multicomponent Flows

Compressible flows may exhibit two different types of discontinuities: shocks and contact discontinuities (material interfaces). These discontinuities are often treated together in numerical simulations by methods such as weighted essentially non-oscillatory (WENO) or Monotonicity preserving (MP) schemes. Capturing these various discontinuities in the context of numerical simulations is challenging since the properties of these discontinuities differ, and their numerical treatment is key to their accurate representation. In this presentation, we propose a novel approach whereby the material interfaces (contact discontinuities) are reconstructed by using the THINC scheme via a novel contact discontinuity detector. The acoustic waves are captured by the WENO or MP schemes. The proposed approach significantly reduces the numerical diffusion across the material interfaces. Several benchmark test cases for the compressible multicomponent flows are presented, indicating the advantages of the proposed approach.