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Published byGaven Dancey Modified over 2 years ago

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Open Source Field Operation and Manipulation

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What is OpenFOAM? OpenFOAM is a library of C++ codes that solve partial differential equations Incompressible flow (Navier-Stokes) Compressible flow (Navier-Stokes) Solid displacement (Elasticity) Pricing stock options (Black-Scholes)

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How does OpenFOAM work?

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Editing input files in case folder Preprocessing Utilities Fluid properties Turbulence properties Meshing

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How does OpenFOAM work? Editing input files in case folder Solving Discretization schemes Numerical Methods Parallel processing Creates output files for each write step Velocity, pressure, turbulence properties, temperature, displacement

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How does OpenFOAM work? Postprocessing paraFOAM Reads output files created when solving Uses paraView Displays flow properties within the domain Various filters Cut into domain Vector plots Contour plots Plot cell centers Create image and video files

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2D Poisuille Flow Geometry and fluid properties Length L = 0.1 m Width 2h = 0.01 m Origin located at the inlet along the centerline Uniform velocity of 0.01 m/s at the inlet Uniform pressure of 0 Pa at the outlet Density of ρ = kg/m 3 Dynamic viscosity of μ = 1.82 x Pa-s

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2D Poisuille Flow Analytical Solution Pressure Gradient Pa/m Maximum velocity m/s Average velocity 0.01 m/s

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2D Poisuille Flow Numerical Solution – Mesh Cells are clustered at the channel entrance and walls

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2D Poisuille Flow Numerical Solution – Pressure Gradient

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2D Poisuille Flow Numerical Solution – Pressure Gradient

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2D Poisuille Flow Numerical Solution – Velocity Profile (uniform)

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2D Poisuille Flow Numerical Solution – Velocity Profile (graded)

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2D Poisuille Flow Numerical Solution – Velocity Profile (comparisson)

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2D Laminar Flow Over Cylinder Metric Drag coefficient Strouhal Number (vortex shedding) Variable Reynolds number Meshes Boundary conditions

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2D Laminar Flow Over Cylinder First mesh

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2D Laminar Flow Over Cylinder First Velocity Field

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2D Laminar Flow Over Cylinder Second Mesh

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2D Laminar Flow Over Cylinder Second Velocity Field

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2D Laminar Flow Over Cylinder Discontinuities

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2D Laminar Flow Over Cylinder Third Mesh

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2D Laminar Flow Over Cylinder Third Velocity Field (discontinuities)

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2D Laminar Flow Over Cylinder Fifth and Sixth meshes Results are invariant to cell density

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2D Laminar Flow Over Cylinder Velocity Field

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2D Laminar Flow Over Cylinder Drag Coefficient

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2D Laminar Flow Over Cylinder Strouhal Number Lift Coefficient

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Lid-Driven Cavity Flow Start-to-finish walkthrough Linux in general Laminar Turbulent Mesh density Grading Numerical Schemes paraFoam

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