Gas bubbles in water tank

CFD_Aspirator · January 19, 2016, 04:21

Hai all,

I am modelling air bubbles in a water tank. The air is injected from a small orifice at the base of the tank. An unsteady simulation is done in Fluent using VOF method. The orifice size is 10 mm and the water head is 0.25 m. When simulation is being done, the air phase is getting attached to the base and growing to a size of about 30 mm before it detaches and starts rising in the liquid. That a big bubble for such a small hole is not possible. Can any one suggest me how to tackle this issue.

hwet · January 20, 2016, 21:35

check your settings for the surface tension maybe?

January 19, 2016, 04:21	Gas bubbles in water tank	#1
CFD_Aspirator New Member Vishnu Join Date: Aug 2015 Posts: 9 Rep Power: 10	Hai all, I am modelling air bubbles in a water tank. The air is injected from a small orifice at the base of the tank. An unsteady simulation is done in Fluent using VOF method. The orifice size is 10 mm and the water head is 0.25 m. When simulation is being done, the air phase is getting attached to the base and growing to a size of about 30 mm before it detaches and starts rising in the liquid. That a big bubble for such a small hole is not possible. Can any one suggest me how to tackle this issue.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
No liquid water exist in my Fuel Cell simulation	fatchang	FLUENT	19	October 15, 2018 14:27
mass flow in is not equal to mass flow out	saii	CFX	12	March 19, 2018 05:21
Simulating a tank filled with water and injecting vapor into it	belkadi	OpenFOAM	3	May 24, 2013 04:43
Gas flow profiles in mixing tank	srinivas	FLUENT	0	November 8, 2006 04:52
modeling spilling of water from a tank	jemteo	CFX	6	June 25, 2006 19:33

January 20, 2016, 21:35		#2
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	check your settings for the surface tension maybe?