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Old   January 17, 2007, 13:35
Default 2-D flow analysis.
chandra mohan
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i am planning to project title "Comparative Study of dragcoefficient for 2-D Bluff bodies" for a Bus body design.

prob: i am going for a 2-D analysis as it will save my computaion time and due to system availability/capabalitiy.

also, a Bus body design can be analysed in 2-D considering front,top and side they represent regular rectangular shape.

can you justify?

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Old   January 17, 2007, 16:57
Default Re: 2-D flow analysis.
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For a range of Reynolds numbers, the body will shed vortices alternatively - definitely 3D.

For other values, there will be an attached vortex attached to the back of the bus. Still 3D.

I don't know if there is any range of Re in which the flow is 2D.

Sorry to be discouraging.
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Old   January 18, 2007, 05:54
Default Re: 2-D flow analysis.
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The size of the re-circulation zone will be different between 2D and 3D. Face it, this is a 3D problem ....

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