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2D vs 3D in relation to pressure gradient

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Old   May 18, 2006, 03:38
Default 2D vs 3D in relation to pressure gradient
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Hello everybody,

I would like to know, more or less, an explanation of the way a simulation of a 3D rectangular channel affects the pressure gradient (a bigger one or a smaller one) in relation to a simulation of a 2D rectangular channel. Because I know that when I simulate 3D channel I take into consideration 2 walls more that restrain the velocity, but what is the effect on the variation (roughly) of pressure's gradient.

Thanks for any advice and best regards

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