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Backwater effect after gaining steady state for few seconds

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Old   September 13, 2019, 14:34
Default Backwater effect after gaining steady state for few seconds
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Mohsin Raza
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Hi ,
I am trying to simulate an open channel flow(a rectangular channel with a slope of almost 10^-6 and) using interfoam. The solution reach to steady state at 3 seconds and remains in steady state for almost 6 to 7 seconds. After that a wave propagate backwards towards the inlet??
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Old   September 19, 2019, 02:44
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Kmeti Rao
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Hi Mohsin,

I think this is about re-circulation effect, In external aerodynamic flow this could be overcome by extending the size of the domain. Can this be applied in your case also?

Krao
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Old   September 30, 2019, 08:03
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Mohsin Raza
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Quote:
Originally Posted by Krao View Post
Hi Mohsin,

I think this is about re-circulation effect, In external aerodynamic flow this could be overcome by extending the size of the domain. Can this be applied in your case also?

Krao
I extended the domain but the behaviour of water somehow, remained the same. I think this might be due to the boundary conditions at the outlet.
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