Droplet simulation inside the channel

a.hajisharifi · June 6, 2018, 11:20

Hi every one

I am going to do a DNS simulation of a fixed droplet inside the channel with Phase Field method
but i don't know how to keep the droplet fixed?

does anyone have an idea or know a paper which is worked on the the droplet kept fixed?

I appreciate your suggestions.
Thanks

309558927 · June 7, 2018, 05:48

Quote:

Originally Posted by a.hajisharifi

Hi every one

I am going to do a DNS simulation of a fixed droplet inside the channel with Phase Field method
but i don't know how to keep the droplet fixed?

does anyone have an idea or know a paper which is worked on the the droplet kept fixed?

I appreciate your suggestions.
Thanks

It's a two-phase flow problem,not very difficulty.The droplet is fixed,but the shape of the droplet is changing with the time,due to the contract angle with wall and the drag force are aslo changed.you can use the VOF model and try the caculation.

BlnPhoenix · June 7, 2018, 07:22

Is it a horizontal or a vertical chanel?

For vertical i would know a possible solution..

But horizontal .. hmm

a.hajisharifi · June 7, 2018, 07:28

Quote:

Originally Posted by 309558927

It's a two-phase flow problem,not very difficulty.The droplet is fixed,but the shape of the droplet is changing with the time,due to the contract angle with wall and the drag force are aslo changed.you can use the VOF model and try the caculation.

thanks for your reply but i should use Phase field model to capture interface (actually i have a diffuse interface not sharp)

a.hajisharifi · June 7, 2018, 07:29

Quote:

Originally Posted by BlnPhoenix

Is it a horizontal or a vertical chanel?

For vertical i would know a possible solution..

But horizontal .. hmm

thanks for your reply,no it is a horizontal channel
but what is your solution ?

BlnPhoenix · June 7, 2018, 07:37

I dont understand your problem very well...

You have a diffusive droplet inside a horizontal chanel that needs to be fixed in position. Can you provide more information, is the interface tracked? Maybe a sketch can help

For a VOF type simulation in a vertical pipe it would be essentially a controlling problem to keep the position at a fixed heigth..

Regards

309558927 · June 8, 2018, 00:01

[QUOTE=a.hajisharifi;695046]thanks for your reply but i should use Phase field model to capture interface (actually i have a diffuse interface not sharp)[/QUO

I don't understand you said the interfaces.

June 6, 2018, 11:20	Droplet simulation inside the channel	#1
a.hajisharifi New Member Arash Join Date: Dec 2015 Location: vienna Posts: 15 Rep Power: 11	Hi every one I am going to do a DNS simulation of a fixed droplet inside the channel with Phase Field method but i don't know how to keep the droplet fixed? does anyone have an idea or know a paper which is worked on the the droplet kept fixed? I appreciate your suggestions. Thanks

June 7, 2018, 07:22		#3
BlnPhoenix Senior Member Join Date: Aug 2014 Location: Germany Posts: 292 Rep Power: 14	Is it a horizontal or a vertical chanel? For vertical i would know a possible solution.. But horizontal .. hmm a.hajisharifi likes this.

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June 7, 2018, 07:37		#6
BlnPhoenix Senior Member Join Date: Aug 2014 Location: Germany Posts: 292 Rep Power: 14	I dont understand your problem very well... You have a diffusive droplet inside a horizontal chanel that needs to be fixed in position. Can you provide more information, is the interface tracked? Maybe a sketch can help For a VOF type simulation in a vertical pipe it would be essentially a controlling problem to keep the position at a fixed heigth.. Regards

June 8, 2018, 00:01		#7
309558927 New Member wujun Join Date: Apr 2012 Posts: 13 Rep Power: 14	[QUOTE=a.hajisharifi;695046]thanks for your reply but i should use Phase field model to capture interface (actually i have a diffuse interface not sharp)[/QUO I don't understand you said the interfaces.