Mesh Alignment issues

[brian vaz]

Dear All

I am currently trying to work on this FDS file to improve my knowledge of FDS as a part of my MSc. project. This file was originally done in FDS 4 , therefore i am trying to adapt it to FDS6 and study the results.. I have managed to convert most of the file except for the mesh alignment error. Every time i try running it it gives me an error saying mesh 1 not aligned with mesh 4 etc .. can i get some advice on how to resolve this ?? please find attached file

[Randy McDermott]

Sorry, but what is your question?  I think it is clear in the FDS User Guide (Sec. 6.3.4) how the meshes must be aligned.

On Wed, Jul 9, 2014 at 1:36 PM, brian vaz <brian...@gmail.com> wrote:

Dear All

I am currently trying to work on this FDS file to improve my knowledge of FDS as a part of my MSc. project. This file was originally done in FDS 4 , therefore i am trying to adapt it to FDS6 and study the results.. I have managed to convert most of the file except for the mesh alignment error. Every time i try running it it gives me an error saying mesh 1 not aligned with mesh 4 etc .. can i get some advice on how to resolve this ?? please find attached file

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[brian vaz]

I am using a mesh description for a previous file created in fds 4.. what I want to know is were the alignment rules different in fds4.?

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[Randy McDermott]

Yes, they were different.  The fourth example in the current guide was permissible in v4.

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[Dave McGill]

Hi Brian,

The most obvious problem is that the cells in the different meshes are all of a different size, so they can't align. Your easiest route would be to make a mesh with 0.125 m cells in the region of the fire. Then surround it with meshes that have cells 0.25 m.

Dave 

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[brian vaz]

Ok.. Thanks. . Ill have to probably modify the mesh line in that case..

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[brian vaz]

Hi Dave
Thanks a lot.. ill try to do that

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[Dave McGill]

You'll have to change to dimensions of the existing meshes, so they are divisible by 0.125 m. Start with the central one, and work outward from it.

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[brian vaz]

Ya I am changing the number of divisions in the outer meshes to make them all 0.25

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