Riemann problem

prapanj

hi friends could some one please explain to me what is the Riemann problem? what is so big about it? and how is it solved? or atleast provide me a link that answers me. I am new to cfd and am willing to learn a lot. I understand that it is about discontinuities. also tell me how it is used in FVM where there are discontinuities at cell interfaces? I come across problems which are named Riemann-xxx problems.. xxx is some other name. so please tell me if the classic riemann problem is called by some other names too. Also tel me is this the same riemann problem used to solve shock problems at ramps. thank u