Questions tagged [porous-medium]

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Question about tensile test of model from research paper [closed]

In this paper they made a tensile force test on their four different models with four different pore size structure to show that pore size is not affecting on the tensile force. But it seems that they ...
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2answers
33 views

Small building basement foundation moisture: permeable vs impermeable

I understand that moisture is the enemy of interiors. I know that the standard basement foundation for a house-sized building uses moisture barriers on the outside of concrete retaining walls to ...
1
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0answers
21 views

What material can wick up fluids while not allowing micro-organisms to pass?

I'm looking for a material that can wick up a solution containing nutrients and sugars. The dirty side of the wick should touch a medium to draw up the solution, on the clean side of the wick ...
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1answer
94 views

Up flow vs down flow through a porous fixed bed

How do I analyse for, or what do I need to consider, when comparing gravity-opposed vs gravity assisted flow in a tube containing a porous bed that partially shrinks (through partial mass loss) over a ...
2
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1answer
4k views

How to force creating a conformal mesh interface between zones in Fluent?

I am trying to perform simple 2D CFD analysis on Fluent having 3 adjacent zones(inlet, porous and outlet). The problem I have is whenever I select non-equilibrium thermal model in porous zone in Cell ...
7
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1answer
2k views

Is there a relation between porosity and PPI density in porous media?

I've seen two methods to describe porosity of porous media (specifically metal foams): Porosity $\epsilon$ which is a ratio between volume of voids and total volume of the medium. PPI (Pores Per Inch)...
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2answers
617 views

How safe is this assumption for turbulence modelling in porous media?

I am studying the performance of volumetric solar receivers (specifically ceramic foams) versus the change of many parameters: solar flux, surface temperature, porosity, pore diameter, flow pressure ...
7
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3answers
246 views

What is "flow instability" in porous media?

Pressure drop across a porous medium can be described by the Forchheimer extension to Darcy’s law: $$-\frac{dp}{dx} = \frac{\mu}{K_1}\cdot v + \frac{\rho}{K_2}\cdot v^2$$ where $K_1$ and $K_2$ are ...