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- - **Defining Viscous and Inertial Resistance Coeff.s
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Defining Viscous and Inertial Resistance Coeff.s
My model involes a porous media fluid. The Fluent manual shows how to deduce the inertial resistance coefficient. However, no information is given about the former.
Somebody help me. sean |

Re: Defining Viscous and Inertial Resistance Coeff
Can't you calculate it from Darcy's law (the permeability) ?
Christian |

Re: Defining Viscous and Inertial Resistance Coeff
If you know the pressure drop of the fluid in the porous media at several given flowrates, you can find the 2 coeff. dP/dx = A*Vē + BV
V can be easily deduced from the flowrate. dP is the pressure drop. dx is the thickness of the porous media. With Excel you can then easily plot dP/dx = f(V). Then you can find A and B. Afterwards you can compute the viscous and inertial coeff. to put into Fluent : C2 = 2*A/rho 1/alpha = B/nu (nu=dynamic viscosity) |

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