cfd solver
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hi
my domain is a quarter of the original geometry of supersonic wind tunnel.wind tunnel mach number is 1.8 . in my domain Using tow symmetry boundary conditions and tow wall boundary condition and a boundary condition input and an output boundary condition my simulation cfx Boundary conditions is: ANALYSIS TYPE: Option = Steady State TURBULENCE MODEL: Option = k epsilon BOUNDARY: inlet FLOW REGIME: Option = Subsonic END HEAT TRANSFER: Option = Static Temperature Static Temperature = 300 [K] END MASS AND MOMENTUM: Option = Total Pressure Relative Pressure = 1.8 [bar] TURBULENCE: Option = Medium Intensity and Eddy Viscosity Ratio END BOUNDARY: outlet Boundary Type = OPENING Location = outlet FLOW REGIME: Option = Subsonic END HEAT TRANSFER: Opening Temperature = 300 [K] Option = Opening Temperature END MASS AND MOMENTUM: Option = Opening Pressure and Direction Relative Pressure = 84000 [Pa] END TURBULENCE: Option = Medium Intensity and Eddy Viscosity Ratio END wall HEAT TRANSFER: Option = Adiabatic END MASS AND MOMENTUM: Option = No Slip Wall END WALL ROUGHNESS: Option = Smooth Wall END After 1600 itration cfx solver stop solution . The error is in the attached image: Please Help me, please Thanks for all |
Try to define inner type of outlet
you can make mass flow on inlet and outlet (if you know values of these BC). The next step is to increase memory allocation in solver (default 1). You can increase to 3. |
Or so You can change to static pressure on outlet
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hi
Martin Thanks for the answer I do not know the mass flow inlet and outlet. But by placing the static pressure at the outlet boundary conditions arise during Solve backflow Why is this form of residuals? And why the solution is stopped? |
I am using the quick processing center. Many computing cores is 28 digit
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Try to define inner type of outlet |
Inner like mass flow, static pressure etc.
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your solution is stopped because You have high velocity on inlet - and that makes high pressure on domain. So on the outlet you have overflow.
You can also change solver model (turbulence) to SST. |
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