Inertial and Viscous Resistance

oky · November 23, 2010, 00:14

Hi all,

I have problem, haw to caculate the viscous and inertial resistance ?

Condition :
Laminar, 3D flow, incompresible, fluid pass porous media is air, material of porous media is Limestone [dolomite], and porous media as cell zone.

Thank you for your help.

JBurnham · November 23, 2010, 12:37

Flow in porous media uses three parameters that describe the permeability and drag in the porous media: porosity, adrg, and bdrg (OPOR, OADRG, and OBDRG for individual components). Depending on the porous drag model you select, the ADRG and BDRG coefficients have different units and meanings. For instance, if using the Reynolds-number dependent drag model, then ADRG is a coefficient related to the viscous drag term, and BDRG is related to the quadratic drag term. The User Manual includes explanations of the equations: try searching for 'porous media'. You'll probably need to curve-fit experimental data to the equations, and watch out for the difference between macroscopic and microscopic (pore) velocity: it's not all that clear in the manual.

oky · November 24, 2010, 02:46

Hi,

Would you give some example ?

Regrads,
Oky Andytya

November 23, 2010, 00:14	Inertial and Viscous Resistance	#1
oky New Member Oky Andytya Join Date: Nov 2010 Posts: 26 Rep Power: 16	Hi all, I have problem, haw to caculate the viscous and inertial resistance ? Condition : Laminar, 3D flow, incompresible, fluid pass porous media is air, material of porous media is Limestone [dolomite], and porous media as cell zone. Thank you for your help.

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November 23, 2010, 12:37		#2
JBurnham Senior Member Jeff Burnham Join Date: Apr 2010 Posts: 204 Rep Power: 17	Flow in porous media uses three parameters that describe the permeability and drag in the porous media: porosity, adrg, and bdrg (OPOR, OADRG, and OBDRG for individual components). Depending on the porous drag model you select, the ADRG and BDRG coefficients have different units and meanings. For instance, if using the Reynolds-number dependent drag model, then ADRG is a coefficient related to the viscous drag term, and BDRG is related to the quadratic drag term. The User Manual includes explanations of the equations: try searching for 'porous media'. You'll probably need to curve-fit experimental data to the equations, and watch out for the difference between macroscopic and microscopic (pore) velocity: it's not all that clear in the manual.

November 24, 2010, 02:46		#3
oky New Member Oky Andytya Join Date: Nov 2010 Posts: 26 Rep Power: 16	Hi, Would you give some example ? Regrads, Oky Andytya