[arya123]

I need a 3D case file of wind flow over a tall building in OpenFoam.
I hope somebody can help me.

[elvis]

you should have searched in the wiki http://openfoamwiki.net

http://openfoamwiki.net/index.php/Ma...banAreaNiigata
http://openfoamwiki.net/index.php/Ma...ngInCityBlocks
http://openfoamwiki.net/index.php/Main_ContribExamples

if the examples from our friends in Japan do not help you
you might search at the "wind energie" people or HVAC people stuff

[arya123]

thank you elvis.
I went through the links you have given and tried some cases. But I used to shift from one to another when errors comes, which I was unable to rectify.

Can you help me in one of the case I have downloaded and tried.
The blockMeshDict file for the case is as given below.

convertToMeters 1.0;

vertices
(
( -0.4 0.28 0 )
( -0.02 0.28 0 )
( 0.02 0.28 0 )
( 0.96 0.28 0 )
( -0.4 0.02 0 )
( -0.02 0.02 0 )
( 0.02 0.02 0 )
( 0.96 0.02 0 )
( -0.4 -0.02 0 )
( -0.02 -0.02 0 )
( 0.02 -0.02 0 )
( 0.96 -0.02 0 )
( -0.4 -0.28 0 )
( -0.02 -0.28 0 )
( 0.02 -0.28 0 )
( 0.96 -0.28 0 )
( -0.4 0.28 0.392 )
( -0.02 0.28 0.392 )
( 0.02 0.28 0.392 )
( 0.96 0.28 0.392 )
( -0.4 0.02 0.392 )
( -0.02 0.02 0.392 )
( 0.02 0.02 0.392 )
( 0.96 0.02 0.392 )
( -0.4 -0.02 0.392 )
( -0.02 -0.02 0.392 )
( 0.02 -0.02 0.392 )
( 0.96 -0.02 0.392 )
( -0.4 -0.28 0.392 )
( -0.02 -0.28 0.392 )
( 0.02 -0.28 0.392 )
( 0.96 -0.28 0.392 )
);

blocks
(
hex (4 5 1 0 20 21 17 16) (29 19 59) simpleGrading (0.05 20 1)
hex (5 6 2 1 21 22 18 17) (21 19 59) simpleGrading (1 20 1)
hex (6 7 3 2 22 23 19 18) (73 19 59) simpleGrading (20 20 1)
hex (8 9 5 4 24 25 21 20) (29 21 59) simpleGrading (0.05 1 1)
hex (10 11 7 6 26 27 23 22) (73 21 59) simpleGrading (20 1 1)
hex (12 13 9 8 28 29 25 24) (29 19 59) simpleGrading (0.05 0.05 1)
hex (13 14 10 9 29 30 26 25) (21 19 59) simpleGrading (1 0.05 1)
hex (14 15 11 10 30 31 27 26) (73 19 59) simpleGrading (20 0.05 1)
);

edges
(
/*
arc 5 6 ( 0 0.02 0 )
arc 6 10 ( 0.02 0 0 )
arc 9 10 ( 0 -0.02 0 )
arc 9 5 ( -0.02 0 0 )
arc 21 22 ( 0 0.02 0.392 )
arc 26 22 ( 0.02 0 0.392 )
arc 25 26 ( 0 -0.02 0.392 )
arc 25 21 ( -0.02 0 0.392 )
*/
);

patches
(
wall walls
(
(5 21 22 6)
(6 22 26 10)
(10 26 25 9)
(9 25 21 5)
)

patch inlet
(
(4 20 16 0)
(8 24 20 4)
(12 28 24 8)
)
patch outlet
(
(3 19 23 7)
(7 23 27 11)
(11 27 31 15)
)
wall sides
(
(16 17 1 0)
(17 18 2 1)
(18 19 3 2)
(12 13 29 28)
(13 14 30 29)
(14 15 31 30)
)
wall lowerUpper
(
(0 1 5 4)
(1 2 6 5)
(2 3 7 6)
(4 5 9 8)
(6 7 11 10)
(8 9 13 12)
(9 10 14 13)
(10 11 15 14)
(20 21 17 16)
(21 22 18 17)
(22 23 19 18)
(24 25 21 20)
(26 27 23 22)
(28 29 25 24)
(29 30 26 25)
(30 31 27 26)
)
);

mergPatchPairs
(
);

Here we get a building that extends from bottom to top of the boundary. I need to change this geometry such that the building height must be reduced (top side of the building shouldn't touch the boundary) so that I can simulate a flow over the building.
Can you show me how to change this case file for that ?

thanks in advance.