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-   -   Rearward Step (Base Flow) (http://www.cfd-online.com/Forums/main/15869-rearward-step-base-flow.html)

cfdxue October 12, 2008 01:31

Rearward Step (Base Flow)
 
Recently I have solved rearward step (backward step, base flow) problem. I compare results of TVD, ACM, and Experimental. Just after step, TVD (Yee-Davis) is predicting low pressure ratio (P/Pinf) while ACM44 is predicting very accurate results . But in downstream region both schemes (TVD and ACM44) over predicting pressure ratio.

May you please explain me that:

1. After step, why TVD is predicting low pressure ratio (P/Pinf) while ACM44 is predicting very accurate results???

2. At downstream region, both schemes (TVD and ACM44) over predicting pressure ratio???

Thanks and Regards


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