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upwind for micronozzle flow

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Old   April 18, 2007, 03:55
Default upwind for micronozzle flow
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Good morning all, I'm running some simulations for micronozzle flow, and I can't understand which numerical method is best fitting: if I use a second order upwind scheme, I can see a weak shock in the divergent part of the nozzle, but if I use a first order upwind this shock becames weaker or disappear. Which solution should I consider correct? Thanks!
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