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why does increasing mesh ruins my simulation ?

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Old   December 9, 2021, 07:35
Smile why does increasing mesh ruins my simulation ?
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mody
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Hello, can you tell me why when I increase mesh my steady fluent simulation diverges ( continuity 1e10) and gives very weird results?

I noticed that only when the mesh has a very low number of elements the simulation converges ( continuity 1e-7)and it gives a rational result.

it is a 2d convergent-divergent nozzle with ideal airflow (inviscid model)
inlet gauge total pressure is 101325 p
initial gauge pressure is 90000 p
outlet absolute pressure is 80000 p
262436767_330566055172100_4774556658446665420_n.png

Last edited by shatarah; December 9, 2021 at 08:53.
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