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Forum: OpenFOAM Running, Solving & CFD April 22, 2009, 11:50
Replies: 20
Views: 3,697
Posted By elisabet
pressure decomposition

Hi Kyian,

As always, you should go to the sources. In this case:
OpenFOAM-1.5.x/applications/solvers/heatTransfer/buoyantSimpleFoam/UEqn.H

there, you would see that both the pressure...
Forum: OpenFOAM Running, Solving & CFD March 18, 2009, 13:17
Replies: 20
Views: 3,697
Posted By elisabet
density fluctuations

Hi Niels,

The 'original' buoyancy term is just (\rho\ \vec{g}), where the density \rho is a function of any other scalar, usually temperature, but it could also be pressure or concentration.
From...
Forum: OpenFOAM Running, Solving & CFD March 11, 2009, 12:03
Replies: 20
Views: 3,697
Posted By elisabet
Hi Niels, Sorry for the del

Hi Niels,

Sorry for the delay, I was quite busy with other things.

First of all, there are some nowadays public experimental results with density currents. Take a look at:



By the...
Forum: OpenFOAM Running, Solving & CFD February 25, 2009, 06:02
Replies: 20
Views: 3,697
Posted By elisabet
Hi Niels, As you've said de

Hi Niels,

As you've said density currents is not my field, but I know some people working on it in Barcelona and Rome and I'm trying to collaborate with them, at least in a long term. They are...
Forum: OpenFOAM Running, Solving & CFD February 17, 2009, 04:55
Replies: 20
Views: 3,697
Posted By elisabet
Hi Niels, I did a similar r

Hi Niels,

I did a similar run some weeks ago and I got also nice results. However, we are planning to compare them with experimental data and see exactly how accurate it is. Moreover, I would...
Forum: OpenFOAM Running, Solving & CFD January 28, 2009, 11:22
Replies: 20
Views: 3,697
Posted By elisabet
Hi Niels, Check in src/fini

Hi Niels,

Check in src/finiteVolume/finiteVolume/laplacianSchemes/gaussLaplacianScheme/gaussLaplaci anScheme.C

About the particle Sc number, it is defined as: Sc=nu_t/D_t, where subscript t...
Forum: OpenFOAM Running, Solving & CFD January 28, 2009, 08:04
Replies: 20
Views: 3,697
Posted By elisabet
Hi Niels, I guess I'm wrong

Hi Niels,

I guess I'm wrong.
Ok, in momentum equation and for incompressible fluids you have:
div(tau) = div(nu_eff grad(u)) + grad(nu_eff):grad(u)

hence, I just implemented the same...
Forum: OpenFOAM Running, Solving & CFD January 27, 2009, 18:01
Replies: 20
Views: 3,697
Posted By elisabet
Hi Niels, Thanks for your a

Hi Niels,

Thanks for your answer.
I cannot omit this term as, when you develop the equations taking into account that Deff is not constant, this new term (or other similar expressions)...
Forum: OpenFOAM Running, Solving & CFD January 27, 2009, 08:53
Replies: 20
Views: 3,697
Posted By elisabet
Hi all OpenFOAMers, I want

Hi all OpenFOAMers,

I want to deal with density currents (water/water with salt) simulations and, to do so, I depart from the twoLiquidMixingFoam and, as a first step, include the RANS libraries...
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