Open channel flow request

##### Title

##### Question

Could you describe how to do an open channel flow analysis, this can be done with multi phase method and interFoam solver but I have no experience with that. I would like to obtain turbulent velocity profile in a 10x10x400 m channel with velocity inlet speed od 1 m/s.

Is it possible to get a velocity profile like in this article?

https://www.brainkart.com/article/Velocity-distribution-in-open-channels_3491/

I tried a lot of variations using simpleFoam and k-epsilon and k-omega method but my velocity profile stays uniform like in the picture.

Thank you for the tutorials, you're doing great work, keep it up!

Is it possible to get a velocity profile like in this article?

https://www.brainkart.com/article/Velocity-distribution-in-open-channels_3491/

I tried a lot of variations using simpleFoam and k-epsilon and k-omega method but my velocity profile stays uniform like in the picture.

https://we.tl/t-7G28jTgIJn

OpenFOAM-version-7 Turbulence-Modelling-in-OpenFOAM 13-14 min 0-10 sec

__Answers:__

Hi,

1. You can find a basic tutorial on interFoam solver here: https://youtu.be/JYHhF25OTm0

2. The profile you are trying looks random, but if you can form it in an equation it is possible. For example, you can add a parabolic equation and develop a fully developed flow condition at the inlet. Here is an example of it: https://youtu.be/_jjYmW8sBNA

1. You can find a basic tutorial on interFoam solver here: https://youtu.be/JYHhF25OTm0

2. The profile you are trying looks random, but if you can form it in an equation it is possible. For example, you can add a parabolic equation and develop a fully developed flow condition at the inlet. Here is an example of it: https://youtu.be/_jjYmW8sBNA

Thank you for the quick response, but I'm actually interested in symmetrical profiles with rectangular and trapezoidal crossection.

Hi,

Would this symmetrical profile be the output from your simulation or would you want to have that specified before your simulation starts. If it's the latter, you can check symmetry boundary conditions in OpenFOAM.

https://www.openfoam.com/documentation/guides/latest/doc/guide-bcs-constraint-symmetryPlane.html

Would this symmetrical profile be the output from your simulation or would you want to have that specified before your simulation starts. If it's the latter, you can check symmetry boundary conditions in OpenFOAM.

https://www.openfoam.com/documentation/guides/latest/doc/guide-bcs-constraint-symmetryPlane.html

Regards,

Ashley

Ashley

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