[ANSYS Meshing] generation mesh for simulation surface roughness in fluent

kamyarmech · February 24, 2016, 11:41

hi.
I want to examine the effect of roughness on the surface of the airfoil But i have several questions on this topic.
1.how much the height of first cell to roughness height ks=0.5mm and ks=1mm and ks=0.3mm and ks=0.1mm and ks=0.03mm?
2.how much the wall yplus for simulation roughness?
3.For high roughness height, constant speed, constant Reynolds, how can we increase dimensionless parameter roughness (ks + = ρ * ks * (u *) / μ)
4.Is there a relationship between the amount yPlus and dimensionless parameters for the simulation of roughness and roughness?
5.How do I know that I've done that simulates the roughness is true?

The results of numerical simulations of the airfoil with smooth surface with results published an article that did have one

Thank you

kamyarmech · February 28, 2016, 10:34

[QUOTE=kamyarmech;586713][QUOTE=kamyarmech;586712]

Quote:

Originally Posted by kamyarmech

hi.
I want to examine the effect of roughness on the surface of the airfoil But i have several questions on this topic.
1.how much the height of first cell to roughness height ks=0.5mm and ks=1mm and ks=0.3mm and ks=0.1mm and ks=0.03mm?
2.how much the wall yplus for simulation roughness?
3.For high roughness height, constant speed, constant Reynolds, how can we increase dimensionless parameter roughness (ks + = ρ * ks * (u *) / μ)
4.Is there a relationship between the amount yPlus and dimensionless parameters for the simulation of roughness and roughness?
5.How do I know that I've done that simulates the roughness is true?

The results of numerical simulations of the airfoil with smooth surface with results published an article that did have one

please help me.
Email: kamyar.jafari1989@gmail.com
Thank you

help me-help me-help me-help me-help me

Far · February 29, 2016, 14:09

there is option in fluent to run on the surface roughness. You cannot mesh the surface roughness !!!

February 24, 2016, 11:41	generation mesh for simulation surface roughness in fluent	#1
kamyarmech New Member kamyar Join Date: Feb 2016 Posts: 4 Rep Power: 10	hi. I want to examine the effect of roughness on the surface of the airfoil But i have several questions on this topic. 1.how much the height of first cell to roughness height ks=0.5mm and ks=1mm and ks=0.3mm and ks=0.1mm and ks=0.03mm? 2.how much the wall yplus for simulation roughness? 3.For high roughness height, constant speed, constant Reynolds, how can we increase dimensionless parameter roughness (ks + = ρ * ks * (u *) / μ) 4.Is there a relationship between the amount yPlus and dimensionless parameters for the simulation of roughness and roughness? 5.How do I know that I've done that simulates the roughness is true? The results of numerical simulations of the airfoil with smooth surface with results published an article that did have one Thank you

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February 29, 2016, 14:09		#3
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	there is option in fluent to run on the surface roughness. You cannot mesh the surface roughness !!!