How small should my mesh sizing be?

samiullah · February 2, 2013, 16:39

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

February 2, 2013, 16:39	How small should my mesh sizing be?	#1
samiullah New Member Samiullah Mahmood Join Date: Dec 2012 Posts: 8 Rep Power: 14	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

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February 3, 2013, 05:06		#2
msaeedsadeghi Senior Member SSL Join Date: Oct 2012 Posts: 226 Rep Power: 16	As the simulation result would not change by refining mesh.

February 7, 2013, 01:26		#3
Mohd123 New Member Mohammed Join Date: Feb 2013 Posts: 12 Rep Power: 14	It is always reccomended to do a Grid Independance Study for any simulations.

February 7, 2013, 07:56		#4
mrenergy Member Mamdouh Join Date: Dec 2012 Location: Calgary, Alberta, Canada Posts: 39 Rep Power: 14	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