Learning Forum

[btingthewind]

Recently I am doing a simulation which needs a porous media method, however, after the pressure drop& velocity fitting curve was done from my experimental values, there came out a negative coefficient, as showed in the following pic, so what should I do to have this problem solved?

BEST REGARDS

[DrAmine]

Refer to the manual as it describes you case with that fit.

[btingthewind]

THX, SIR

I have read the manual, but it does not help at all. In the manual it only tells: Although the best fit curve may yield negative coefficients, it should be avoided when using the porous media model in ANSYS fluent. But it does not indicate how to elimiate the negative coefficients. So, what should I do?

[Rob]

Use the polynomial to plot the curve back to x = 0.0001  and see where it goes. 

[btingthewind]

Thx,I am going to have it tried.

[tpurwar]

Were you able to find a solution? I am running into a similar issue, my plot has higher viscous dominance for lower velocities (linear nature) and higher inertial dominance for higher velocities (polynomial nature). I will really appriciate any help. Thank you!nn