Tagged Questions
0
votes
1answer
132 views
Darcy law yields extreme speed for gas flow throgh packed spheres?
The darcy law is as follows:
$u=-\frac{k}{\mu}\nabla p$.
Assume we have a gas, then $\mu$ is about $10^{-5}$.
$k$ for packed spheres a few mm in diameter is of order $10^{-8}$ $m^2$.
Say the ...
2
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0answers
78 views
How do I simulate a constant velocity flow in porous media
I am modelling gas combustion in porous media. Most contemporary models assume that the pressure drop from the porous media is small enough to disregard, but I want to include that in my ...
9
votes
1answer
74 views
How can one build a multi-scale physics model of fluid flow phenomena?
I am working on a problem in Computational Fluid Dynamics, modeling multi-phase fluid flow through porous media. Though there are continuum equations to describe macroscopic flow (darcy's law, ...
3
votes
2answers
280 views
Laws of fluid flow in porous medium
What are the equations that describe the flow of a fluid in a porous medium? Is there a variation of the Navier-Stokes equations?
I would like to model the flow of air through a sponge-like ...
23
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3answers
1k views
When water climbs up a piece of paper, where is the energy coming from?
Take a glass of water and piece of toilet paper. If you keep the paper vertical, and touch the surface of the water with the tip of the paper, you can see the water being absorbed and climbing up the ...
