"first glimpse" series
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Contents
Installing OpenFOAM
In order to be able to complete the tutorials, you will have to install OpenFOAM. There are multiple ways to do this. First, follow the official guideline [http:// www.openfoam.com/download/installation.php here].
Alternatively, you can follow the video tutorial of Jozsef Nagy or the written tutorial of Joel Guerrero.
First simulation - Flow in an elbow
In this tutorial you will get a first hands-on glimpse into the workflow of CFD simulations with OpenFOAM. The following topics will be covered:
- basic case setup
- initial values
- boundary conditions
- mesh
- simulation (2D elbow case with three meshes)
- postprocessing
[http:// openfoam.com/documentation/tutorial-guide/tutorialse7.php#x12-650003.1 Second simulation - Liquid-gas interaction]
In this second tutorial you will learn about the liquid-gas interaction in a multiphase flow. Here you will simulation a transient flow of two fluids separated by a sharp interface, or free surface. The focus here is on:
- mesh generation
- boundary conditions
- initial fields
- fluid properties
- time step control
- discretisation schemes
- solver control
- running the simulation
- postprocessing
Third simulation - Vortex shedding
This is a more advanced simulation, where you can get a first idea, how to model the complex fluid dynamic phenomenon of vertex shedding behind a square cylinder. Find the pdf and the case files here.
- Click on the link to the pdf
- On slides 54-65 you will find a short description of the problem
- Download the case from the link provided
- Extract the file
- Open a terminal by pressung ctrl+alt+t
- If you extracted the file e.g. in Downloads change your working directory to the simulation case by entering into the terminal
cd Downloads/30x/advanced_physics/turbulence/squarecil/les
- Follow the commands on slide 76 of the pdf
This simulation will run for a couple of hours depending on your hardware. We advice you to run it over night and check the results in the morning.