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Boundaries that change their character in time
Posted 10 mag 2012, 07:25 GMT-4 Fluid & Heat, Computational Fluid Dynamics (CFD) Version 4.2 1 Reply
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Hi all
Can I change the property of a boundary between an inlet to become a wall (no slip) depending on time?
I'm trying to model a contracting heart. I managed to move the boundaries and to make the flow move with them as well. The problem is with the inlet and outlet. The thing is that they are both valves, which means that while the heart contracts the inlet is a closed wall (no slip boundary) and the outlet is a (let's say) 0 pressure outlet. When the heart expands the outlet becomes a closed wall (no slip boundary) and the inlet is now an inlet with (let's say) 100 Pa pressure.
Any way around this?
Thanks a lot
Hemi
Can I change the property of a boundary between an inlet to become a wall (no slip) depending on time?
I'm trying to model a contracting heart. I managed to move the boundaries and to make the flow move with them as well. The problem is with the inlet and outlet. The thing is that they are both valves, which means that while the heart contracts the inlet is a closed wall (no slip boundary) and the outlet is a (let's say) 0 pressure outlet. When the heart expands the outlet becomes a closed wall (no slip boundary) and the inlet is now an inlet with (let's say) 100 Pa pressure.
Any way around this?
Thanks a lot
Hemi
1 Reply Last Post 11 mag 2012, 05:40 GMT-4
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Posted:
1 decade ago
Hi
not that easy if you want to change completely the physics.
There is an example in the model library I believe of a liquid switch, that locally modifies the fluid viscosity to mimic a mechanical shutter, but I cannot find it back like that ;)
--
Good luck
Ivar
not that easy if you want to change completely the physics.
There is an example in the model library I believe of a liquid switch, that locally modifies the fluid viscosity to mimic a mechanical shutter, but I cannot find it back like that ;)
--
Good luck
Ivar