Day 5

Welcome to Day 5. After some dry topics, today we have some fun simulations for you. You will also get a links to materials, which can help improve the quality of your simulation. If you have some problems in the future with your simulations, you can come back to them. Most probably you will find a solution.

Go back to "3 weeks" series.

Running your first case on your own

Try your gained knowledge about OpenFOAM and set up a case on your own. For this you will need everything you have learned so far. The pdf version can be found here. You will cover

• creating your mesh
• setting up initial and boundary conditions
• setting up physical properties
• setting correct numerical settings
• running your simulation
• postprocessing your simulation

Hagen Poiseuille flow

Another fun simulation is the laminar Hagen Poiseuille flow. Follow the set-by-step introductions to utilize and further extend your gained knowledge about

• a simple case setup
• function objects
• laminar flow
• numerics
• sampling during postprocessing

Session B: Using OpenFOAM

In this tutorial you can find a set of videos that help you revising the major topics covered before and explore some additional solvers:

• the primer: you will get familiar with the main strategy to develop a case.
• the case overview: you will get familiar with the structure of a case.
• basics of blockMesh: you will get build a simple mesh.
• inspection of controlDict: you will be guided through the main file that controls your case.
• hints related to Dictionaries: making life easier by displaying options in dictionaries.
• fvSchemes and fvSolution: informs you about key settings of the numerics.
• Sampling and Probing: you will learn essential post-processing steps.
• visualization 0.1: basics of how to look at your data.
• DPMFoam Part 1, and DPMFoam Part 2: quick look at an Euler-Lagrange solver.
• MPPICFoam: an interesting solver for all that like particles!

Course of Håkan Nilsson

Here you will the link to the course page by Håkan Nilsson from Chalmers University of Technology with ~125! tutorial cases.

Tips and Tricks for OpenFOAM simulations

Below you will find additional material, where you can find tips and tricks for the improvement of your simulation. Feel free to go though them and fall back to them in the future, once you encounter some problems in your simulation.

Tips 1

In this handy summary of OpenFOAM functionalities you can read about e.g.

• geometry and mesh creation
• case setup
• case control
• field initialization
• boundary conditions
• turbulence modeling
• multiphase modeling (Eulerian and Lagrangian)
• solvers
• postprocessing
• programming in OpenFOAM

Tips 2

In this material you can find information on the small details, which do make the difference between a good simulation and crashing.

• shell environment
• looking for information in the source code
• running cases on a cluster
• mesh quality check
• boundary and initial conditions
• numerics
• convergence
• function objects

End of Day 5

We are happy, that you finished Day 5. We hope, that you enjoyed your journey with OpenFOAM so far. By now you should have a good understanding about the basics and the theory. On Day 6 we will continue with a more advanced topic:

• meshing.

See you on Day 6.