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Gravity in Flow Simulation not performing?

Question asked by 1-SCA0VU on Jul 14, 2010
Latest reply on Aug 25, 2013 by Jared Conway

Hi,

 

This is my first post, so please forgive any forum  gaffs I make.

 

Gravity doesn't seam to have any effect on my flow  simulations. I have run a simple test in exactly the same way, having  gravity on first and and off second, but the results are identical. And  yes, gravity is acting in the right direction.

 

As I am  working on a gravity powered device, it's crucial that this force be  included.

 

I have been using this for only 4 months, but I have  managed to use it successfully to design a carburetor which, when  prototyped in  reality was very close to the flow simulation results. However, I had to  fake gravity by working out the additional pressure myself, and adding  it to the atmospheric pressure cap on top. I did this on advice from  another flow simulation user, but I still don't understand it and I  can't fake it this time.

 

I've attached a screen shot of the set up. I hope someone can help.

 

reservoir test cross section.jpg

If i've not explained something or its a bit unclear, please do ask.

 

Thanks

James

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