how can I declare variables - please help

cfd-noob · January 20, 2012, 04:36

Hello,
I would like to declare a variable in blockMeshDict.

It should look like this:

aa=10;

bb=aa/10;

with "int" it doesn't seem to work.

Thank you very much

colinB · January 20, 2012, 05:21

Hey,

as far as I know creating blockMeshDict files including variables doesn't
work, though the file itself is written in C++ style.

If you want to use variables you better write yourself a small tool
(I'm not aware of one existing)
that creates a blockMeshDict file and with this tool you can create
insert values and variables in a blockMeshDict file, which are dependent
on each other.

For the case that I'm wrong, I would also be interested in how to include
variables in a different manor.

regards
Colin

EDIT: This looks more like a topic for the blockMesh sub Forum than for
the running/solving sub Forum

anon_a · January 20, 2012, 05:40

I think that the "m4" macros are what you are looking for.
Just look for the corresponding tutorials
.../tutorials> find ./ -name *m4
and also in the forum.

I have not used this my self but it looks easy to understand.

cfd-noob · January 20, 2012, 06:39

Danke vielmals,
ich versuche es mal mit einem Matlab-Script.

morard · January 20, 2012, 12:30

You can also write a python script which creates blockMeshDict. It's very easy to write one, and works well.

January 20, 2012, 04:36	how can I declare variables - please help	#1
cfd-noob New Member Join Date: Jan 2012 Location: Germany Posts: 9 Rep Power: 14	Hello, I would like to declare a variable in blockMeshDict. It should look like this: aa=10; bb=aa/10; with "int" it doesn't seem to work. Thank you very much

January 20, 2012, 06:39	Danke	#4
cfd-noob New Member Join Date: Jan 2012 Location: Germany Posts: 9 Rep Power: 14	Danke vielmals, ich versuche es mal mit einem Matlab-Script.

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January 20, 2012, 05:21		#2
colinB Senior Member Join Date: Aug 2010 Location: Groningen, The Netherlands Posts: 216 Rep Power: 18	Hey, as far as I know creating blockMeshDict files including variables doesn't work, though the file itself is written in C++ style. If you want to use variables you better write yourself a small tool (I'm not aware of one existing) that creates a blockMeshDict file and with this tool you can create insert values and variables in a blockMeshDict file, which are dependent on each other. For the case that I'm wrong, I would also be interested in how to include variables in a different manor. regards Colin EDIT: This looks more like a topic for the blockMesh sub Forum than for the running/solving sub Forum

January 20, 2012, 05:40		#3
anon_a Disabled Join Date: Mar 2011 Posts: 174 Rep Power: 15	I think that the "m4" macros are what you are looking for. Just look for the corresponding tutorials .../tutorials> find ./ -name *m4 and also in the forum. I have not used this my self but it looks easy to understand.

January 20, 2012, 12:30		#5
morard Member Dejan Morar Join Date: Nov 2010 Posts: 78 Rep Power: 16	You can also write a python script which creates blockMeshDict. It's very easy to write one, and works well.