I am concerned looking for an exact Riemann solver for compressible 1D multi-component Euler equations, supplied with the ideal gases equation of state and under the assumptions:
- Mechanical equilibrium
- Thermal equilibrium
For example for the form used by Gouasmi et al. 2020 [1]. In a question [2] of this forum, it is very well explained. For me, it seems that he/she is using the Riemann solver for single-component model in the multi-component model. If doing this, I do not see how to obtain the partial densities/mass fractions in the intermediate state. Borisov & Rikov [3] provide the exact Riemann solver for a different equation of state, and Declercq et al. [4] provide it for two-phase model. However, despite used in the literature, I don't find an exact Riemann solver for this model.
If anyone has an idea, I would be very grateful,
Have a nice day,
References: [1] https://www.sciencedirect.com/science/article/pii/S0045782520300955 [2] Exact Riemann solver for perfect gas mixture: problem with Newton's method convergence [3] https://www.researchgate.net/publication/325098653_An_exact_Riemann_solver_in_the_algorithms_for_multicomponent_gas_dynamics [4] https://hal.science/hal-01580049/document