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June 22, 2003, 06:06
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Velocity overprediction
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#1 |
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Guest
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Hi!
What may cause the flow velocity overprediction of 30% in its maximum point? Problems begin already at the secondary inlet boundary : the U-velocity value after computation is 55% higher than the initial one defined in the BC. The flow swich for BC is 'Fixed Mass'. Thanks, Julie |
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June 22, 2003, 23:57
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Re: Velocity overprediction
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#2 |
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Guest
Posts: n/a
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You should use the 'Fixed Velocity' switch for your second inlet as opposed to 'Fixed Mass'. STAR-CD adjusts the inlet velocity to match the mass flow that you want fixed by (roe)*A*|U|.
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June 24, 2003, 04:54
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Re: Velocity overprediction
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#3 |
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Guest
Posts: n/a
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Hi,
The problem is that I need mass flow to be fixed... There was no overprediction with more coarse grid even with 'Fixed Mass' option. Regards, Julie |
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