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May 27, 2009, 23:46 |
pressure boundary
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#1 |
New Member
linfangcai
Join Date: May 2009
Posts: 9
Rep Power: 16 |
Does pessure boundary mean new fluid flows into the computional domain under the influence of pressure?
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June 1, 2009, 11:01 |
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#2 |
Member
MC
Join Date: Mar 2009
Posts: 56
Rep Power: 17 |
Hi~
The fluid fraction determines what fluid is entering. If you have a tank with fluid and void and you set the top boundary to pressure and leave the fluid fraction to 1 then fluid 1 will enter the tank. If you set the fluid fraction to zero and a pressure boundary then the void will use that pressure and no fluid will enter the domain. However if you are using two-fluid then then having fluid fraction as 0 will allow fluid 2 to enter the domain. So fluid fraction of 1 for fluid 1 and fluid fraction 0 for void/fluid2. MC |
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June 3, 2009, 21:03 |
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#3 |
New Member
linfangcai
Join Date: May 2009
Posts: 9
Rep Power: 16 |
Thank you,melissa!
I understand. |
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October 20, 2009, 01:38 |
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#4 |
New Member
Sean
Join Date: Oct 2009
Posts: 3
Rep Power: 16 |
Hi Melissa,
Would this mean that for a casting simulation you would want to include some void region (considering that the shot sleeve is not completely full of material)? |
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October 21, 2009, 00:15 |
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#5 |
Senior Member
michael barkhudarov
Join Date: Mar 2009
Location: Sante Fe, New Mexico, USA
Posts: 336
Rep Power: 18 |
Nikesandman,
referring to your original post, you can include the shot sleeve in your simulation to replace the inlet boundary. The plunger can have a time-dependent velocity just like in the real machine. |
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