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-   -   why does increasing mesh ruins my simulation ? (https://www.cfd-online.com/Forums/fluent/240064-why-does-increasing-mesh-ruins-my-simulation.html)

shatarah December 9, 2021 07:35

why does increasing mesh ruins my simulation ?
 
1 Attachment(s)
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
Attachment 87494


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