High-order spectral volume scheme for multi-component flows using non-oscillatory kinetic flux

摘要

In this paper, an arbitrary high-order compact method is developed for compressible multi-component flows with a stiffened gas equations of state (EOS). The main contribution is combining the high-order, conservative, compact spectral volume scheme (SV) with the non-oscillatory kinetic scheme (NOK) to solve the quasi-conservative extended Euler equations of compressible multi-component flows. The new scheme consists of two parts: the conservative part and the non-conservative part. The original high order compact SV scheme is used to discretize the conservative part directly. In order to treat the equation of state of the stiffened gas, the NOK scheme is utilized to compute the numerical flux. Then, careful analysis is made to satisfy the necessary condition to avoid unphysical oscillation near the material interfaces. After that, a high-order compact scheme for the non-conservative part is obtained. This new scheme has the following advantages for numerical simulations of compressible multi-component stiffened gas: high order accuracy with compact stencil and oscillation-free near the material interfaces. Numerical tests demonstrate the good performance and the efficiency of the new scheme for multi-component flow simulations. (C) 2017 Elsevier Ltd. All rights reserved.