droplet model using surface tension

boesendorfer · May 22, 2014, 05:50

After defining the velocity of a droplet in the void, it should fly along the certain direction and remain a sphere.

But when I use surface tension model simutaneously, it just flies for a short time and then breaks up.

During the flying period, the velocity changed both in direction and magnitude, and the volume of droplet decreased gradually.

Why did it happen? Is it resulted from the surface tension fluctuation solved by pressure iteration because of the droplet mesh movement?

Thanks!
(I have set all the other physic model off.)

boesendorfer · May 22, 2014, 07:21

It seems that the flying process can get steady if the speed is relatively large compared to the droplet size(mesh size).

If the speed is low, I can't get it stable even if giving a step-size small enough.

Can anyone help me?

May 22, 2014, 05:50	droplet model using surface tension	#1
boesendorfer New Member Join Date: Apr 2014 Posts: 17 Rep Power: 12	After defining the velocity of a droplet in the void, it should fly along the certain direction and remain a sphere. But when I use surface tension model simutaneously, it just flies for a short time and then breaks up. During the flying period, the velocity changed both in direction and magnitude, and the volume of droplet decreased gradually. Why did it happen? Is it resulted from the surface tension fluctuation solved by pressure iteration because of the droplet mesh movement? Thanks! (I have set all the other physic model off.) Last edited by boesendorfer; May 22, 2014 at 22:51.

May 22, 2014, 07:21		#2
boesendorfer New Member Join Date: Apr 2014 Posts: 17 Rep Power: 12	It seems that the flying process can get steady if the speed is relatively large compared to the droplet size(mesh size). If the speed is low, I can't get it stable even if giving a step-size small enough. Can anyone help me? Last edited by boesendorfer; May 22, 2014 at 22:44.

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