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July 25, 2019, 05:15 |
Unexpected direction of fluid flow
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#1 |
Member
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Dear all
I am simulating the water flow through a screen (the screen which is a metal sheet with holes in it for the passage of fluid and/or particles). Another similar post can be found at Flow being directed to one direction Please refer to animation at https://www.dropbox.com/s/n2sc9nbgh9...ation.ogv?dl=0 or the attached snapshots. The fluid flow has inlet velocity boundary condition from the top feeding area. The left side is defined as a wall. The right and bottom opening are defined as the atmospheric boundary. It is a turbulent case with KOmegaSST model running with solver interFoam. The second phase in the system is ambient air. The front and back are the cyclic boundaries. The velocity and pressure boundary conditions are as follows: Velcoity Code:
dimensions [0 1 -1 0 0 0 0]; internalField uniform (0.0 0.0 0.0); boundaryField { outlet { type pressureInletOutletVelocity; inletValue uniform (0.0 0.0 0.0); value uniform (0.0 0.0 0.0); //type inletOutlet; //inletValue uniform (0 0 0); //value uniform (0 0 0); } inlet { type flowRateInletVelocity; value uniform (0.0 0.0 0.0); volumetricFlowRate constant 0.00207;//as per calculation in diary;//9.26E-6; //type fixedValue; //value uniform (0 0 -0.04655); } /*empty_walls { type empty; }*/ front { type cyclic; } back { type cyclic; } Screen_topBlockage { type fixedValue; value uniform (0.0 0.0 0.0); } Screen_VFinal { type fixedValue; value uniform (0.0 0.0 0.0); } left_wall { type fixedValue; value uniform (0.0 0.0 0.0); } } Code:
dimensions [1 -1 -2 0 0 0 0]; internalField uniform 101325; boundaryField { outlet { type totalPressure; p0 uniform 101325; rho rho; phi rhoPhi; gamma 0; } inlet { type fixedFluxPressure; //type zeroGradient; } /*empty_walls { type empty; }*/ front { type cyclic; } back { type cyclic; } Screen_topBlockage { type fixedFluxPressure; //type zeroGradient; } Screen_VFinal { type fixedFluxPressure; //type zeroGradient; } left_wall { type fixedFluxPressure; //type zeroGradient; } } Code:
dimensions [0 0 0 0 0 0 0]; internalField uniform 0.0; boundaryField { outlet { type zeroGradient; //type inletOutlet; //inletValue uniform 0; //value uniform 0; } inlet { type fixedValue; value uniform 1.0; } /*empty_walls { type empty; }*/ front { type cyclic; } back { type cyclic; } Screen_topBlockage { type zeroGradient; } Screen_VFinal { type zeroGradient; } left_wall { type zeroGradient; } } k.txt omega.txt nut.txt Can anyone tell me why the fluid has the typical tendency to flow leftward where left plane is defined as a wall. Last edited by rahulksoni; July 26, 2019 at 03:06. |
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