Motorbike Simulation with OpenFOAM Hasret Türkeri 9 December 2016

OpenFOAM Computer software Solves equation for flows Momentum Pressure Energy … Developed for Linux No graphic interface Run with commands

The Concepts CFD : Computational Fluid Dynamics Initial and boundary conditions Mesh - Grid Numerical Methods …

Steps in CFD Pre-Processing Processing Post-Processing Preparation of grid Setting initial and boundary conditions Selecting numerical schemes Processing Solving the equation using computer software, OpenFOAM Post-Processing Plotting and analyzing the results

Pre-Processing in OpenFOAM Case directory U, p, rho,… Constant System blockMesh fvSchemes, fvSolutions

Pre-Processing in OpenFOAM blockMesh vertices ( ( -5 -4 0) (15 -4 0) (15 4 0) ( -5 4 0) ( -5 -4 8) (15 -4 8) (15 4 8) ( -5 4 8) ); blocks hex (0 1 2 3 4 5 6 7) (20 8 8) simpleGrading (1 1 1)

Pre-Processing in OpenFOAM Setting the motorbike velocity 0.org/U => fixedValues => initialConditions -> flowVelocity (20 0 0) Setting the grid size In system/blockMesh change the values in green box blocks ( hex (0 1 2 3 4 5 6 7) (20 8 8) simpleGrading (1 1 1) );

Processing with OpenFOAM OpenFOAM runs with commands ln motorbike case directory ./Allrun wait until it finishes, it may take a couple of ten minutes Check log.* files in case of any problem

Post-Processing with OpenFOAM run the command in the motorbike directory paraFoam Using parafoam draw countor plots, and streamlines to analyze your results For tutorial about post-processing you can refer to the post- processing section http://cfd.direct/openfoam/user-guide/tutorials/

How to Start OpenFOAM on Windows I strongly recommend to download and install OpenfOAM from the link below http://www.cfdsupport.com/install-openfoam-for-windows.html Follow the instruction on the webpage

How to Start OpenFOAM on Windows Open OpenFOAMforWindows 16.10 C:/OpenFOAM/16.10/Faruk-3.0.x/run

How to Start OpenFOAM on Windows Copy motorBike case dir From C:\OpenFOAM\16.10\cygwin64\opt\OpenFOAM\OpenFOAM- 3.0.x\tutorials\incompressible\simpleFoam To C:/OpenFOAM/16.10/Faruk-3.0.x/run

How to Start OpenFOAM on Windows Open 0.org/initialConditions and set the flow velocity flowVelocity (20 0 0) Important: The dimension here is m/s Open system/blockMesh change the values in green box blocks ( hex (0 1 2 3 4 5 6 7) (20 8 8) simpleGrading (1 1 1) ); The number of cells in x, y, z, direction respectively

How to Start OpenFOAM on Windows In terminal, change your directory into motorBike cd motorBike In terminal, run the commands ./Allclean ./Allrun Wait until it finishes, it may takes a couple ten minutes Once it completes, in terminal, run paraFoam

How to Start OpenFOAM on Windows In terminal, change your directory into motorBike cd motorBike In terminal, run the commands ./Allclean ./Allrun Wait until it finishes, it may takes a couple ten minutes Once it completes, in terminal, run paraFoam

How to Start OpenFOAM on Windows Follow the tutorial for paraFoam at the link http://cfd.direct/openfoam/user-guide/tutorials/ Plot contour plots Stream lines ….