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how to correct backflow in modelling cylinder? |
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March 22, 2013, 14:29 |
how to correct backflow in modelling cylinder?
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#1 |
New Member
amin masumi
Join Date: Jul 2012
Posts: 17
Rep Power: 13 |
hi dear,
I have a cylinder that have backflow after modelling, I extended my inlet and outlet but there is backflow yet. please help me how can I correct this backflow? thanks a lot |
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March 22, 2013, 16:40 |
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#2 |
New Member
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Hi,
It can be a model problem, a numerical problem or a mesh problem. Please could you describe better your simulation, like reynolds number, fluid proprieties, and geometry? |
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March 23, 2013, 12:13 |
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#3 |
New Member
amin masumi
Join Date: Jul 2012
Posts: 17
Rep Power: 13 |
thank you for your attention,
that's a simple grid model, a simple cylinder with an inlet and outlet, but I want to model two fluids at once, one at the right hand of the piston and the other at the left hand of piston, oil as the first fluid at the right and air at the right hand as the second fluid. I have some experiences in modeling cylinders and a piston pump, but I want to ask about any information or ebook ... to help me know further about backflow, what would cause backflow and how to correct backflow. this cylinder modelling that I described at first is so important for me, please try to help me, thanks a lot. |
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March 23, 2013, 13:01 |
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#4 | |
New Member
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Quote:
I think there is a recirculation zone near to your outflow. |
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March 23, 2013, 13:32 |
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#5 |
New Member
amin masumi
Join Date: Jul 2012
Posts: 17
Rep Power: 13 |
my dear,
but when I display velocity vector results, although there are perfect results that are expected but all the vectors are reversed, and no vector is displayed so that passing out of the boundary. what would cause the problem? |
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