AWENO with Adaptive Diffusion Numerical Flux (7.20)
The new numerical flux adaptively adjusts the numerical diffusion coefficient presented in the LLF flux. The coefficient is estimated by a suitable Rankine-Hugoniot condition, which gives a more accurate estimation of the local speed of propagation. To ensure robustness, lower and upper bounds of the coefficient are obtained with the help of the convection-pressure splitting of the Jacobian.