Symmetry Boundary Condition
Dear all,
I'm sorry I didn't find an explanation to my question in the ANSYS Help, so I have to ask here: When I'm using a symmetry boundary condition in my simulation, which divides my geometry in two equal parts, will I have to impose half of the mass flow or anyway the full mass flow as my boundary condition? Thank you in advance for your reply. Best regards, Stefan |
specify half
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Yes, Far is right.
The mass flow must be proportional to the partion, meaning that if you divide the domain in two parts, the mass flow must be 1/2 of what it would be on the whole domain. If you divide it in 6 parts, it should be 1/6 of the total mass flow, etc... |
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Thank you for your help!
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boundary condition (symmetry vs periodic doubt)
Dear friends,
i am doing 3D wing analysis, i have doubt on boundary conditions in fluent ie both symmetry and periodic, anybody have the answer please let me know briefly,for what kind of purpose to use symmetry & periodic boundary conditions, please tell any example with problem. |
Hi
Quote:
if your 3D-wing isn't symetric at all, then ... ;) |
Mathematically a symmetry boundary is zero normal velocity and zero normal gradient on all other terms, and periodic boundaries have all values equal on the equivalent locations on both boundaries.
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Hi, is this the same for velocity? if I model half the model, should I half the inlet velocity? I am guessing pressures remain the same because they're defined per unit area?
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Nope.
You may have to half the system mass flow, but the velocity remains the same. You only halved the cross-section, not the flow conditions |
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