Riemann invariants....Any physical interpretation? -- CFD Online Discussion Forums

July 11, 2013, 05:51	Riemann invariants....Any physical interpretation?	#1
Farouk New Member CFDLearner Join Date: Jul 2013 Posts: 16 Rep Power: 12	Hi there, I am really new to the CFD simulation, and started some simple algorithms recently. I then got introduced to the Riemann Invariants. Can any one provide some physical interpretation? Also, why is it the case, that when we have an open tube, and the flow is entering with a subsonic speed, then at this point, only one characteristic exist dx/dt=u+a ? Thank you in advance.

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