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Forum: CFX March 26, 2013, 11:26
Replies: 12
Views: 7,006
Posted By oj.bulmer
That's how I typically model the 3D porous loss...

That's how I typically model the 3D porous loss cone, and specify the transverse loss multiploer as 1e8 times. But this mandates a 3D geometry. It is slow and time-consuming. Moreover, since the flow...
Forum: CFX March 26, 2013, 05:53
Replies: 12
Views: 7,006
Posted By oj.bulmer
Any comments?

Any comments?
Forum: CFX March 21, 2013, 05:48
Replies: 12
Views: 7,006
Posted By oj.bulmer
Darcy's equation for pressure loss for resistance...

Darcy's equation for pressure loss for resistance screen is:

\Delta P = 1/\alpha * \mu v L + 1/2 \zeta \rho v^2

\alpha and \zeta being permeability and inertial loss coefficient...
Forum: CFX March 18, 2013, 07:16
Replies: 12
Views: 7,006
Posted By oj.bulmer
I am having trouble exactly here. I don't want to...

I am having trouble exactly here. I don't want to use porous region, but porous interface, though it would be more physical if I go with former. Making it a porous region is really expensive. There...
Forum: CFX March 17, 2013, 08:52
Replies: 12
Views: 7,006
Posted By oj.bulmer
This is what I want to do, especially for the...

This is what I want to do, especially for the angled flow. When it comes to curved (cylindrical and conical) perforated strainers, the flow is not always perpendicular (refer to attached snap). I was...
Forum: CFX March 16, 2013, 07:50
Replies: 12
Views: 7,006
Posted By oj.bulmer
Well, that is true. But what I wanted to say is...

Well, that is true. But what I wanted to say is that as per his own words, his results are based on compilation of theoretical and laboratory studies (including crude experimentation at times) of...
Forum: CFX March 15, 2013, 05:29
Replies: 12
Views: 7,006
Posted By oj.bulmer
Perforated sheet, wiremesh - resistance coefficient

We have been using Idelchik's "Hydraulic Resistance Handbook" for ages to find the resistance coefficients of perforated sheet, wiremesh and other porous regions. But irony is it is 2013 yet we are...
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