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problems in high speed external flow

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Old   January 12, 2007, 12:55
Default problems in high speed external flow
jon william
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Hi everyone I met a problems during solving an external high speed air flow over a body of finned missile. I couldn't solve a flow over 1.5 Mach number. An error message " pressure or temprature limited for .... in .. cells " just before the drag coefficient curve has a constant value with iterations. This error is displayed in the fluent help, and a solution is suggested to redeine the limits of the parameters. I changed the limites to range from allowable minimum value to allowable maximum value and the error is still appears. Where is the mistake I done? Can any one help me?

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Old   January 12, 2007, 13:29
Default Re: problems in high speed external flow
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if you're using the segregated solver try using the coupled one. This should solve your problem even if it requires a lot ofmemory and time. Luca
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Old   January 14, 2007, 07:37
Default Re: problems in high speed external flow
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You can plot the pressure and temperature contours and find out the locations where the pressure and tempearture values exeed the limits. Check the aspect ratio & skewness of the grids there ... try to refine the grid at these locations... check the proper boundary conditions also..

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