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March 3, 2003, 06:40 |
Fluctuating mass flow
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#1 |
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I am carrying out an analysis involving a compressible flow of air. THis is my first attempt at an internal compressible flow and i do not seem to be able to get the mass flow rate out to converge. the mass flow rate out of my model is fluctuating by up to 4 percent of the mass flow in. In incompressible flows I usually use the mass balance as one of the indicators that my model has converged, the pressure results i have are consistent with empirical and theoretical predictions. My question is: is it usual to have such fluctuations in compressible flow modelling and if not what may i have missed to cause this instability in the solution?
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