[Engineers]

Hello,

First let me state that I'm new to OpenFOAM world, and I'm training myself with small cases. The following question arose from a case of double wall channel flow using foam-extend-3.2. I have been trying to use the Multigrade capabilities of blockMesh with the following blockMeshDict:
"
convertToMeters 1;

vertices
(
(0 0 0)
(2 0 0)
(2 1 0)
(0 1 0)
(0 0 0.01)
(2 0 0.01)
(2 1 0.01)
(0 1 0.01)
);

blocks
(
hex (0 1 2 3 4 5 6 7) (100 50 1)
simpleGrading
(
1
((0.25 0.4 4) (0.5 0.2 1) (0.25 0.4 0.25))
1
)
);
);

edges
(
);

boundary
(
fixedWall
{
type wall;
faces
(
(0 1 5 4)
(3 2 6 7)
);
}
inlet
{
type patch;
faces
(
(0 3 7 4)
);
}
outlet
{
type patch;
faces
(
(1 5 6 2)
);
}
frontAndBack
{
type empty;
faces
(
(0 3 2 1)
(4 5 6 7)
);
}
);

mergePatchPairs
(
);
"

However, this does not work with the typical "blockMesh" command, which has an issue with the extra brackets in "block" section of the code"
"
wrong token type - expected Scalar found on line 37 the punctuation token '('
"

After some search online, I noticed that users of OF 2.1-2.2 had to install a new app "blockMeshDG" to be able to use the Multi-grading of a block. I tried installing blockMeshDG using the following commands that I found online:
"
wget https://bitbucket.org/akidess/blockmeshdg/get/tip.zip -O latest-blockmeshDG.zip
unzip latest-blockmeshDG.zip
cd akidess-blockmeshdg-*
chmod +x Allwmake
find . -exec touch '{}' \;
./Allwmake
"
However, I ended up with the following error while installing it:
"
blockMesh/blockMeshTopology.C:27:18: error: Time.H: No such file or directory
make: *** [Make/linux64GccDPOpt/blockMeshTopology.o] Error 1
Making dependency list for source file blockMeshApp.C
could not open file Time.H for source file blockMeshApp.C
could not open file attachPolyTopoChanger.H for source file blockMeshApp.C
could not open file slidingInterface.H for source file blockMeshApp.C
"

This is followed by over 30 lines of other errors.

Sorry for the long story... Would you happen to know what I'm doing wrong here?

Thanks

[Rolanzo]

Hi, I am running the same issue, so I wonder if you managed to solve this problem?

[Engineers]

Sorry, I did not get a solution for this problem.

[Flowkersma]

Hi,

As far as I know foam-extend's blockMesh does not support multi-grading. OpenFOAM 3 and 4 support multi-grading out of the box so for them there is no need to install any external applications. Obviously, you can create the multi-grading mesh with OpenFOAM and then use the resulting mesh with foam-extend.

Regards,
Mikko

[akidess]

http://www.cfd-online.com/Forums/ope...tml#post561324

This post explains the problem. Another hint, compare the blockMeshTopology.C of blockMeshDG (see compiler error message) with the blockMeshTopology.C of your foam-extend installation. Probably at that point the fix will be easy for you.