Difference between revisions of "OpenFOAM/C2/Creating-simple-geometry-in-OpenFOAM/English"

How to create a simple geometry

How to view geometry in paraview

I am using Linux Operating system Ubuntu 10.04

OpenFOAM version 2.1.0

ParaView version 3.12.0

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

run>> tutorials >> incompressible>> icoFoam >>cavity

Let us take the Lid driven cavity case as an example.

I have already opened the command terminal and entered

the path for lid driven cavity

$of5

To go to the run folder, type:

$cd $FOAM_RUN

To open the cavity case directory, type:

$cd tutorials/incompressible/icoFoam/cavity/cavity

To list the contents of case directory, type:

$ls

constant>>polyMesh

Geometry is inside the polymesh folder of constant

In this there is another folder called as polymesh

$ls 0 constant system

To open the system directory, type:

$cd system

To list the contents of the system directory, type:

$ls blockMeshDict controlDict fvSchemes fvSolution

type gedit blockMeshDict

Open the blockMeshDict file with any editor of your choice

In the terminal type gedit blockMeshDict and press enter

Minimise the blockMeshDict file

you need to give a a unit cell thickness value in the z-axis.

minimise the slide

right click >create document>empty file

right click > create document > Empty file

and name it as blockMeshDict.

(Note that M and D here are capital)

upto convertToMeters

to the new blockMeshDict file form line 0 to convertTometers.

type vertices

(0 0 0) and move to positive x axis

enter (1 0 0)

(0 space 0 space 0) and press enter move towards the point 1 in positive x-axis

and enter (1 space 0 space 0) and press enter

(0 space 1 space 0 ) and press enter

enter (1 0 1)

Lid driven cavity is a single block

Note that Lid driven cavity is taken as a single block

block (0 1 2 3 4 5 6 7 ) total 8 points

in brackets enter ( 0 put space after each point and enter 1 2 3 4 5 6 7 )

For multiple blocks the points will be more.

enter ( 30 30 1)

insert ) and ;

Close the bracket and insert a semicolon and press enter

insert (

insert a open bracket and press enter

Let me switch back to slides

insert ;

insert a semicolon

Enter open and close brackets In brackets enter the points for faces

insert } and ;

Insert a curly brackets and put a semicolon.

for front and back face can be kept empty

The complete blockMeshDict file is as shown here.

The command terminal will not work till blockMeshDict is closed

Note that command terminal will not work until blockMeshDict file is closed

Creating a simple geometry in OpenFOAM

Viewed the geometry in Paraview

This brings us to the end of the tutorial

Change the geometry parameters : Enter the grid points as (40 40 1) and (50 50 1).

View the geometry in paraview

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