Converge solution for Wall film Model

Jeeloong · November 12, 2015, 14:13

Hi,

I am running two-phase simulation with Euler-Lagrangian simulation where secondary phase is tracked via lagrangian calculation. As droplet hitting wall, I use Eulerian Wall Film theory.

All simulation is run in transient state. However, I wasn't sure how do I dictates that the solution for wall film is converged and steady (FLUENT).

Thanks

Kind Regards,
Jee Loong

Sarang V · November 13, 2015, 15:20

What kind of a problem are you solving ?
1. Is your Lagrangian particle source periodic (fuel injector) or sequential (one time only)
2. Do you use any kind of film vaporization model ?

Jeeloong · November 18, 2015, 11:13

Dear Sarang V,

Appreciate for your response. I am running continuous injection of particles into a duct domain and upon hitting the wall it forms film.

It is not runs on periodical timing like fuel injector or sequential (one time like spray)

No there is not vaporization model applied to remove the mass as I assumed that the wall temp is well below boiling temp of liquid. And the oil droplet enters from surface injection at normal average temperature probably 30 celcius.

Thanks

Regards,
Jee Loong

Sarang V · November 18, 2015, 11:34

Ok, In that case I would just look at a plot of film mass vs time and overlay the total fuel mass for reference.

November 12, 2015, 14:13	Converge solution for Wall film Model	#1
Jeeloong Member Join Date: Jan 2015 Location: United Kingdom Posts: 53 Rep Power: 11	Hi, I am running two-phase simulation with Euler-Lagrangian simulation where secondary phase is tracked via lagrangian calculation. As droplet hitting wall, I use Eulerian Wall Film theory. All simulation is run in transient state. However, I wasn't sure how do I dictates that the solution for wall film is converged and steady (FLUENT). Thanks Kind Regards, Jee Loong

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November 13, 2015, 15:20		#2
Sarang V New Member Sarang Join Date: Oct 2015 Posts: 22 Rep Power: 10	What kind of a problem are you solving ? 1. Is your Lagrangian particle source periodic (fuel injector) or sequential (one time only) 2. Do you use any kind of film vaporization model ?

November 18, 2015, 11:13		#3
Jeeloong Member Join Date: Jan 2015 Location: United Kingdom Posts: 53 Rep Power: 11	Dear Sarang V, Appreciate for your response. I am running continuous injection of particles into a duct domain and upon hitting the wall it forms film. It is not runs on periodical timing like fuel injector or sequential (one time like spray) No there is not vaporization model applied to remove the mass as I assumed that the wall temp is well below boiling temp of liquid. And the oil droplet enters from surface injection at normal average temperature probably 30 celcius. Thanks Regards, Jee Loong

November 18, 2015, 11:34		#4
Sarang V New Member Sarang Join Date: Oct 2015 Posts: 22 Rep Power: 10	Ok, In that case I would just look at a plot of film mass vs time and overlay the total fuel mass for reference.