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Open Source Field Operation and Manipulation. What is OpenFOAM? OpenFOAM is a library of C++ codes that solve partial differential equations Incompressible.

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Presentation on theme: "Open Source Field Operation and Manipulation. What is OpenFOAM? OpenFOAM is a library of C++ codes that solve partial differential equations Incompressible."— Presentation transcript:

1 Open Source Field Operation and Manipulation

2 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)

3 How does OpenFOAM work?

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

5 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

6 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

7 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

8 2D Poisuille Flow Analytical Solution Pressure Gradient Pa/m Maximum velocity m/s Average velocity 0.01 m/s

9 2D Poisuille Flow Numerical Solution – Mesh Cells are clustered at the channel entrance and walls

10 2D Poisuille Flow Numerical Solution – Pressure Gradient

11 2D Poisuille Flow Numerical Solution – Pressure Gradient

12 2D Poisuille Flow Numerical Solution – Velocity Profile (uniform)

13 2D Poisuille Flow Numerical Solution – Velocity Profile (graded)

14 2D Poisuille Flow Numerical Solution – Velocity Profile (comparisson)

15 2D Laminar Flow Over Cylinder Metric Drag coefficient Strouhal Number (vortex shedding) Variable Reynolds number Meshes Boundary conditions

16 2D Laminar Flow Over Cylinder First mesh

17 2D Laminar Flow Over Cylinder First Velocity Field

18 2D Laminar Flow Over Cylinder Second Mesh

19 2D Laminar Flow Over Cylinder Second Velocity Field

20 2D Laminar Flow Over Cylinder Discontinuities

21 2D Laminar Flow Over Cylinder Third Mesh

22 2D Laminar Flow Over Cylinder Third Velocity Field (discontinuities)

23 2D Laminar Flow Over Cylinder Fifth and Sixth meshes Results are invariant to cell density

24 2D Laminar Flow Over Cylinder Velocity Field

25 2D Laminar Flow Over Cylinder Drag Coefficient

26 2D Laminar Flow Over Cylinder Strouhal Number Lift Coefficient

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


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