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Big difference between 2D and 3D Computational Domain

Question asked by Filippo Francini on Aug 5, 2013
Latest reply on Sep 27, 2013 by Jared Conway

hello thank you in advance anyone who can help me in this problem that is going bugging me.

 

I am studying a particular type of valve (Tesla's Valve) has conducted a very simple I want to know the pressure difference between inlet and outlet, before sliding the fluid in one direction and then in the other (I use 2 configurations), the fluid is water and there are no particular boundary conditions.

 

The problem is that when I study in 2D Computational Domain, the values are similar to those of a scientific comparison but when I use 3D computational domain (that of my greatest interest), the values of pressure decrease dramatically.

 

I don't understand why this difference of values should be similar, I do not know what to do to find the cause.

 

If someone would be so kind as to help me I would be very grateful, I could provide more specific details.

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