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March 2, 2021, 07:19 |
Compressible flow too many iteration
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New Member
ian
Join Date: Feb 2021
Posts: 1
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Hi everyone, my name is ian
I am new in Ansys, it is about my 30 days learning this software I am doing my research for my bachelor degree but I face a problem I want to re-create the simulation that published in a journal as a validation for my research, but I can't get the convergence my case is a steam ejector( high pressure steam goes into e a nozzle with high velocity and low pressure) this pressure will suct the air behind, then the mixture goes into a converging diverging section my set up is density based,steady,axisymetric energy equation on, K omega SST water vapor(density:ideal gas, viscosity:sutherland) Boundary Condition: Pressure inlet1= 800KPa ,Tsaturation Pressure inlet2=15KPa , Tsaturation Pressure outlet = 30KPa ,Tsaturation operating condition 0 wall, axisymetric explicit, second-order, courant number set to 0,5, iteration 25000 I try to use implicit as a method but it is fly high to the floating point when I try default courant number,the graphic doesn't smooth my meshing set up : orthogonal minimum 0,8 average 0,85 skewness max 0,3 does my set up is right? why it doesn't want to convergence? I really confuse thank you so much |
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converging-diverging, diverge, nozzle, steam ejector |
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