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Old   January 9, 2003, 15:30
Default variable cross-section
  #1
Zsolt Ulbert
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Hello,

does anybody know a reference for the derivation of the Navier-Stokes eqs in duct with variable cross-section?

Thanks,

Zsolt.

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Old   January 13, 2003, 02:05
Default Re: variable cross-section
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yfyap
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what type of duct, straight circular/ rectangular?
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Old   January 15, 2003, 08:18
Default Re: variable cross-section
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Zsolt Ulbert
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I am interested in Navier-Stokes equation including variable cross section for straight rectangular duct.

Thank you
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Old   January 15, 2003, 08:59
Default Re: variable cross-section
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yfyap
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generally, for ducts of varying cross section in the streamwise direction (eg convergent or divergent ducts), you have to introduce a new boundary-fitted coordinate system (normally non-orthogonal) and then recast the NS eqs (in cartesian , cylindrical coordinate, etc)into this new coordinate.
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