[KeiJun]

Dear Sir,

I am using porousSimpleFoam solver in OpenFOAM.

Are there criteria that d can be set to 0 or that f can be set to 0?
And are there criteria that d (viscous) is dominant or that f (inertia) is dominant?

I calculated Re number by the equation:
Re=u*dp/ν=u/ν*K^0.5　(u：flow velocity, dp：diameter of the packed particles, ν：kinetic viscosity, K：permeability=dp^2*ε^3/(180*(1-ε)^2), ε：porosity),
and the result Re was less than 100 (about 55),
so I judged that d is dominant and set f to 0.

However, when I calculated tentatively not setting f to non-zero value, I obtained the different result (differenct pressure distribution).

Is the above judgement correct?
Which may I trust the result, f=0 or f≠0?


Here, I calculated d and f by the following equation, respectively:
　　d=150/dp^2*(1-ε)^2/ε^3
　　f=3.5*(1-ε)/dp/ε^3.

I am lookking forward to your comment.


KeiJun

[Antimony]

Hi,

Have you taken a look at the link below? It should help address some of your questions.

http://www.tfd.chalmers.se/~hani/kur...ukurReport.pdf

Hope this helps.

Best Regards,

Antimony

[KeiJun]

Dear Antimony,

Thank you for your reply.

I have already taken a look at the link, but I think this material isn't written about my questions in.

I would appriciate it you would answer my questions in plain language.


KeiJun