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. How does OpenFOAM work? 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/m3
Dynamic viscosity of μ = 1.82 x 10-5 Pa-s

8. 2D Poisuille Flow Analytical Solution Pressure Gradient
Pa/m
Maximum velocity
0.015 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