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-   -   How small should my mesh sizing be? (http://www.cfd-online.com/Forums/fluent/112688-how-small-should-my-mesh-sizing.html)

samiullah February 2, 2013 16:39

How small should my mesh sizing be?
 
Hello everyone, I am working on a final year project at university and it is related to the flow of a slurry mixture in a straight pipe. I was just wondering how small should my mesh sizing be? We have no guidance as to how small or where to start from?

From what I understand I should keep reducing the mesh size until there is less than 2% difference between the head loss after running the solutions....but I just don't know where to start the mesh sizing from and how to justify using that figure.

Any help would be much appreciated.

Regards

Sami

msaeedsadeghi February 3, 2013 05:06

As the simulation result would not change by refining mesh.

Mohd123 February 7, 2013 01:26

It is always reccomended to do a Grid Independance Study for any simulations.

mrenergy February 7, 2013 07:56

Hi Sami,

If you are asking about the starting ...

according to the model that you use:

1- the recommended range of wall Y+ will help you to estimate the first mesh size.
2- play on the range of mesh size incremental ratio keeping the first cell size.

read more about your model.

GOOD LUCK

Mamdouh


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