CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   REEF3D (https://www.cfd-online.com/Forums/reef3d/)
-   -   'Narrow contraction' mesh (https://www.cfd-online.com/Forums/reef3d/238880-narrow-contraction-mesh.html)

RMV October 8, 2021 07:57

'Narrow contraction' mesh
 
1 Attachment(s)
Hi REEF3D team,

First of all, thanks for creating REEF3D. It looks really promising for a wide range of (hydrodynamic) applications.

I'm trying to carry out the 'narrow contraction' tutorial, but the default mesh does not seem to be properly generated (see image).

Default control settings:

C 11 1
C 12 21
C 13 21
C 14 2
C 15 21
C 16 3

B 1 0.05
B 130 1

F 3 0.0 0.5
F 11 0.0 0.8 0.6 0.6
F 11 0.8 1.1 0.6 0.4
F 11 1.1 1.4 0.4 0.4
F 11 1.4 1.7 0.4 0.6
F 11 1.7 2.5 0.6 0.6

F 21 0.0 0.8 0.0 0.0
F 21 0.8 1.1 0.0 0.2
F 21 1.1 1.4 0.2 0.2
F 21 1.4 1.7 0.2 0.0
F 21 1.7 2.5 0.0 0.0

M 10 4

Any feedback would be greatly appreciated.

https://ibb.co/phx0J70

Felix_Sp October 8, 2021 12:05

I had the same problem in version 21.04. I think the freecoor part of DiveMesh is not continued anymore in the current and last version (take a look at the release-notes in GitHub). That is why I think this tutorial is not working anymore.

valgrinda October 8, 2021 13:27

Hi Rick and Felix,

sorry for the oversight regarding the tutorial case, we will update it. Yes, the freecoor option has been removed. Please use the solid options instead.

RMV October 12, 2021 09:37

Hi Hans,

Thanks for the reply! How would we then generate a non-rectangular mesh (such as a contraction or sloping bottom) without importing an STL file?

valgrinda October 18, 2021 05:18

Hi Rick,

REEF3D is built around the immersed boundary method, so a rectilinear (optionally non-uniform) mesh is used. Complex structures are simply immersed into the mesh. This make the grid generation process relatively straightforward and enables us to employ high-order methods when solving the governing equations.

RMV October 19, 2021 04:53

Hi Hans,

Thanks a lot, I get it now!


All times are GMT -4. The time now is 20:48.