Hi Dears Friends.

In the context of CFD, what is the Riemann Problem?

Thanks.

Riemann problem simply defined as;

Conservation laws together with particular initial data of two constant states separated by a single discontinuity.

Riemann problem can in be single phase and two-phase as well.

this is the best to read in Riemann problem

E F Toro

Riemann Solvers and Numerical Methods for Fluid Dynamics.

A Practical Introduction.

Springer--Verlag. Berlin, 1999.