# Flow Over a Spillway

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 October 19, 2009, 11:36 Flow Over a Spillway #1 New Member   PEPIN Nicolas Join Date: Sep 2009 Posts: 5 Rep Power: 16 Hi everybody! I'm a new user of OpenFOAM and I need some explanations... I want to model the flow over a spillway. I have the geometry of the spillway in .stl format. I managed to make a good refined mesh with blockMesh and then snappyHexMesh. Now I have to enter all the boundaries and it's quite difficult for me... I want to use interFoam (it seems that this solver is good for free surface flows, isn't it?). I explain to you what are the boundary conditions I know: * at the upstream of the spillway, the fluid depth is constant equal to 15m. * at the downstream of the spillway, the boundary is open (no condition) (fluid can pass through the boundary) * at the bottom, I want a viscous condition (velocity equal to 0) * the surface of the spillway has a Strickler coefficient of 70 (or roughness equal to 3 mm) How can I model all this? There are such a lot of derived types that I can't understand which one is the good one... Do you have an idea? Do you know if it exists a dictionary that explains all the types available? because the user guide is not very detailed about that... To finish has anyone simulated yet something like a flow over a spillway, or a dam? Thanks for your help! Best regards.

 October 21, 2009, 04:48 #2 Senior Member   Håkan Nilsson Join Date: Mar 2009 Location: Gothenburg, Sweden Posts: 204 Rep Power: 18 Hi Nicolas, Here you have a master thesis describing such a project done in Fluent: http://www.tfd.chalmers.se/~hani/pdf_files/Computational_Modeling_of_Flow_over_a_Spillway_fin al_version.pdf I am very interested in having the same simulation done in OpenFOAM, so you can contact me directly on hani(at)chalmers(dot)se, and I can give you the files. Then I can try to give you a hand on how to set up everything in OpenFOAM. When we are done, you should write a small tutorial on how to do such simulations in OpenFOAM, and post it in the OpenFOAM Wiki. What do you say? Best regards, Håkan.

 Tags boundary conditions, constant depth, free surface flow, interfoam, spillway