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Problem with Nozzle in CFD study

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Old   January 4, 2021, 06:28
Unhappy Problem with Nozzle in CFD study
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Jorge Ortiz
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Hello everyone, I have a question with the CFD study of my nozzle. It is a DF-49 industrial nozzle from Koolair. Currently I have a very small mesh that is viable, but it requires too much calculation time, which makes operations difficult.

Regarding the mesh, I have used a structured polyhedral mesh, with meshing of the boundary layer in the form of prisms. Regarding the treatment of the wall area, I want to do it with a Wall Law, from a y + = 300 to a y + = 50.

The flow regime I have used is (Incompressible / Subsonic). The main study is done on the inlet pressure to the nozzle. The range of pressure values ​​that we are going to study goes from X Mp to Y Mp.

As for the turbulence of my study fluid, I am going to choose a Standard K-Epsilon turbulence model.

My doubt is that I can't figure out how to mesh correctly and check the convergence, exactly, in a quali-quantitative way, to be able to affirm that the convergence is real.

I would appreciate help, I'm stuck.
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Old   January 4, 2021, 10:05
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Matt
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Your question is not clear. Are you asking how to verify your results are independent of your mesh?
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Old   January 7, 2021, 04:46
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Jorge Ortiz
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Both, Independence and convergence
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convergance, converge case setup, mesh, nozzle, starsim ccm+

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