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Vacuum simulation set up

Question asked by Patrick Hands on Dec 10, 2014
Latest reply on Dec 18, 2014 by Jared Conway

Hi,

 

I asked this questions a few backs and got good feedback on how to set the problem up. I believe I did what I was informed to do but I am unsure.

 

I have a manifold design for my thesis and I am trying to simulate a vacuum drawing up through up from 16 nozzles to pick up small objects.

 

I was told to place the design is a small box and apply a 1atm pressure to the walls and leave the base pressure free.

 

I then applied a outlet volume flow rate to the outlet which will be attached to the vacuum pump.

 

as you can see in the images I don't think the results are right and I am wondering have I done something wrong in the set up??1..PNG2..PNG

There is no movement in the flow trajectories and the velocity is zero?

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