Mesh scheme in unsteady turbulent flow

Sufyan Abushaala · September 5, 2014, 07:39

Dear all

I wonder if someone can help me in defining the best mesh scheme in the unsteady transient modeling. My model is basically a sphere travelling along the center line of a horizontal pipe filled with water.

So, what mesh method and sizing configuration would you recommend me to use?

Regards,

mprinkey · September 5, 2014, 11:12

What turbulence model? DNS, LES, and k-eps models have very different meshing requirements.

Sufyan Abushaala · September 5, 2014, 12:19

It is k-e model

mprinkey · September 6, 2014, 20:57

K-eps is the easiest to mesh because you are not resolving turbulent structures. Just read up on y+ requirements on your grid spacing, etc:

http://www.computationalfluiddynamic...-requirements/

You might review their many other tips and tricks, as it seems you are new to this area.

Sufyan Abushaala · September 8, 2014, 05:18

Thanks a lot for those information

September 5, 2014, 07:39	Mesh scheme in unsteady turbulent flow	#1
Sufyan Abushaala New Member Sufyan Abushaala Join Date: Feb 2014 Location: Huddersfield, UK Posts: 18 Rep Power: 12	Dear all I wonder if someone can help me in defining the best mesh scheme in the unsteady transient modeling. My model is basically a sphere travelling along the center line of a horizontal pipe filled with water. So, what mesh method and sizing configuration would you recommend me to use? Regards,

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September 5, 2014, 11:12		#2
mprinkey Senior Member Michael Prinkey Join Date: Mar 2009 Location: Pittsburgh PA Posts: 363 Rep Power: 25	What turbulence model? DNS, LES, and k-eps models have very different meshing requirements.

September 5, 2014, 12:19		#3
Sufyan Abushaala New Member Sufyan Abushaala Join Date: Feb 2014 Location: Huddersfield, UK Posts: 18 Rep Power: 12	It is k-e model

September 6, 2014, 20:57		#4
mprinkey Senior Member Michael Prinkey Join Date: Mar 2009 Location: Pittsburgh PA Posts: 363 Rep Power: 25	K-eps is the easiest to mesh because you are not resolving turbulent structures. Just read up on y+ requirements on your grid spacing, etc: http://www.computationalfluiddynamic...-requirements/ You might review their many other tips and tricks, as it seems you are new to this area.

September 8, 2014, 05:18		#5
Sufyan Abushaala New Member Sufyan Abushaala Join Date: Feb 2014 Location: Huddersfield, UK Posts: 18 Rep Power: 12	Thanks a lot for those information