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

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Old   February 24, 2016, 10:41
Default generation mesh for simulation surface roughness in fluent
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kamyar
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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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Old   February 28, 2016, 09:34
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[QUOTE=kamyarmech;586713][QUOTE=kamyarmech;586712]
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Originally Posted by kamyarmech View Post
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
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Old   February 29, 2016, 13:09
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there is option in fluent to run on the surface roughness. You cannot mesh the surface roughness !!!
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