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Ahmed Body Velocity Calculation

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Old   November 18, 2019, 11:09
Post Ahmed Body Velocity Calculation
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Prashant
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Hi,
I've created Ahmed body and plotted the velocity profile.
I've tried to compare it with experimental data, all the way values are almost the same but
My problem is that at the beginning position it shows negative value in experimental data but I'm not getting the negative value.
As at -163mm, as in the given image below with blue tick mark, there are some negative values at the beginning near-wall but mine are not.
I think I'm getting absolute value, does anyone know how to correct them.

Ex perimental data is from.http://cfd.mace.manchester.ac.uk/cgi...as82_rsol.html
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Old   November 18, 2019, 11:55
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Lucky Tran
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You're plotting and tabulating velocity magnitude.... which is a positive semi-definite quantity.... Yes, it's like an absolute value. Maybe plot something else...
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Old   November 18, 2019, 19:46
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Prashant
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But my aim is to create velocity profile of Ahmed body as shown in experimental data,
Can you please tell me what is the best way to create velocity profile to get negative value with it also?
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ahmed body, post procesing, star ccm, star ccm+, star ccm+ help

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