[sandy]

Hi, why you not to try to combine compressibleInterFoam solver and some heatTransfer solver? I will try it too.

[bephi]

hi at all!
at the moment i am doing some simulations of a flow through a piston valve. right now i achieved some good results with the simpleFoam solver including k-w-SST model for low velocities or volume rate respectively. but when the effect of cavitation sets in, my results don´t follow the measured ones. therefore I try to set up a simulation with a multi-phase-solver. I decided to use rasCavitatingFoam but I achieved just unphysical results. After I read that some more people have problems with this solver and a friedly guy showed me a comparison of solvers ( http://web.student.chalmers.se/group...PosterOFW5.pdf ) I thought I rather use interPhaseChangeFoam. Would you say this is a good decision? (1)
Unfortunately I wasn´t able to set up a case now because I always get errors.
I downloaded the dambreak case calculated with interPhaseChangeFoam but I am not exactly sure what I need to change besides BCs and values of nu and rho. Is there somethin else? (2)

at the inlet i define my velocity with fixedValue (0 0 -1.04), outlet has fixedValue with 476.2.
I heard that it would be good to use solutions from a converged calculation as starting values for the more complicated. But how can I do that? (3) After simpleFoam my resulting pressures are given in m^2/s^2 because of the density. interPhaseChangeFoam is compressilble and the pressure unit is Pa.


best wishes!

[nimasam]

hi buddies
could you please correct me if im wrong

first in phaseChangeTwoPhaseMixture::vDotAlphal() there is following expression
volScalarField alphalCoeff = 1.0/rho1() - alpha1_*(1.0/rho1() - 1.0/rho2());

but the source term in gamma equation is mdot/rhoLiquid , so how the above code can be right ?

second : why the following expression has been added in pEqn.H :
- (vDotvP - vDotcP)*pSat + fvm::Sp(vDotvP - vDotcP, p)

[vahid.najafi]

Hello OpenFoam users ,

I'mstudying on the Kunz model.we know in this model we have two term for mass dest and prod.(m+ and m-)

What mean mDotAlphal() and mDotP()In interphasechange?
What is the difference between these two??

[abe]

Hi,
I am using InterPhaseChange solver to simulate cavitation in OF2.1x
Although by old versions (i.e. OF1.5) I can get good results, with this new version results are not good at all. Dose anybody else get similar conflicts?

ABE

[abe]

Hi,

I am using InterPhaseChange solver to simulate cavitation in OF2.1x
Although by old versions (i.e. OF1.5) I can get good results, with this new version results are not good at all. Dose anybody else get similar conflicts?

ABE

[abe]

Originally Posted by Jason3beard

If your simulation is incompressible, then, i think, you must try interPhaseChangeFoam

Hi, thx for your reply. I am using interPhaseChange solver. But I can not get results in OF2.1 or 2.2 versions

[yangzhuan]

Originally Posted by haghajani

Dear all,

Why there is no solver in Multi-phase flow solver series, capable of handling phase change due to evaporation?
I want to simulate high pressures release of Liquid Hydrogen, which evaporates shortly (flash evaporation/its boiling Temperature is 22K), after releasing in to atmosphere and am investigating if the multiphase solvers can be helpful;
I am thinking to "interfoam" based solver capable of handling with two phase flow + evaporation.

Would you please let me know, where/How I should modify, if the idea feasible?

Any other suggestion, I will be thankful;
Hamed Aghajani
hamed (dot) aghajani (at) gmail (dot) com

Hi, I want to simulate LNG gasification in water. The temperature of LNG is -169 degrees, and the temperature of water is 25 degrees. Due to temperature difference, the LNG would be gasification. Could the interPhaseChangeFoam simulate this case?

[navidamin]

can someone please answer this question?

I am also wondering about the vDot terms in phasechange solvers of OF. where do they come from? I have found the analytical explanation for gas/liquid interface. but does should it also be considered for melting/solidification?