MULTIPHASE - SINGLE DROPLET

November 18, 2003, 12:24

Hi!

I try to simulate a water drop (d=1mm, always spherical!!) falling in air, and obtain the velocity fields in the drop and in the surrounding the air. So far, I have tried the VOF, Mixture and the Eulerian Models, but not able to maintain the sperical shape of the interphase (drop spreads over the domain), and the expected inner and outer velocity fields (seems that there is no coupling between the two phases). I am not sure that Fluent includes necessary boundary conditions at the interphase, so that I will not need to define them of my own by UDF.

Does any one know how can I work this out?

Thanks in advance

Jacee · June 8, 2018, 12:33

Hello Did you make any progress with your simulation?

CeesH · June 8, 2018, 17:04

In 15 years, I do he made progress.

Maybe you can find what you are looking for here: https://www.sciencedirect.com/scienc...42727X17307786 (although you did not ask a FLUENT related question really, so I am not sure what you are looking for)

Jacee · June 12, 2018, 14:22

Hello thank you so much for responding, I am new to fluent and have been trying to make this exact simulation for our a month but have had no luck.

Fluent does not even recognize the inner water droplet I made. I made the model in CREO and transported it into design modeler.

I did something a bit different. Instead of Water droplets moving through air and maintaining the spherical shape to see the velocity fields inside, I tried making a stationary fixed sphere water droplet in a cylinder that had air flow going through it. I just do not know how to make the software recognize the droplet.

I used VOF model cause that seems to be the best way to go about it. Please if you can help me, that would be great. The simulation seems like such a easy thing but I just don't know how to do it.

November 18, 2003, 12:24	MULTIPHASE - SINGLE DROPLET	#1
ozgur Guest Posts: n/a	Hi! I try to simulate a water drop (d=1mm, always spherical!!) falling in air, and obtain the velocity fields in the drop and in the surrounding the air. So far, I have tried the VOF, Mixture and the Eulerian Models, but not able to maintain the sperical shape of the interphase (drop spreads over the domain), and the expected inner and outer velocity fields (seems that there is no coupling between the two phases). I am not sure that Fluent includes necessary boundary conditions at the interphase, so that I will not need to define them of my own by UDF. Does any one know how can I work this out? Thanks in advance

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June 8, 2018, 12:33		#2
Jacee New Member J Philip Join Date: May 2018 Location: A place where no one uses fluent Posts: 4 Rep Power: 8	Hello Did you make any progress with your simulation?

June 8, 2018, 17:04		#3
CeesH Senior Member Cees Haringa Join Date: May 2013 Location: Delft Posts: 607 Rep Power: 0	In 15 years, I do he made progress. Maybe you can find what you are looking for here: https://www.sciencedirect.com/scienc...42727X17307786 (although you did not ask a FLUENT related question really, so I am not sure what you are looking for)

June 12, 2018, 14:22		#4
Jacee New Member J Philip Join Date: May 2018 Location: A place where no one uses fluent Posts: 4 Rep Power: 8	Hello thank you so much for responding, I am new to fluent and have been trying to make this exact simulation for our a month but have had no luck. Fluent does not even recognize the inner water droplet I made. I made the model in CREO and transported it into design modeler. I did something a bit different. Instead of Water droplets moving through air and maintaining the spherical shape to see the velocity fields inside, I tried making a stationary fixed sphere water droplet in a cylinder that had air flow going through it. I just do not know how to make the software recognize the droplet. I used VOF model cause that seems to be the best way to go about it. Please if you can help me, that would be great. The simulation seems like such a easy thing but I just don't know how to do it.