bubble rising in a column

swamysrikanth · September 22, 2010, 08:03

hello frnds,
can anyone explain the way to mesh for bubble rising in a column. i want to study the dynamics of the bubble and deformation of bubble with time. i am confused with the part of creation of bubble...whether i have to create a bubble geometry or i can initialize the bubble injection through boundary conditions. how to do the meshing at critical path of bubble rising through the column...

thanks in advance
srikanth

nimasam · September 26, 2010, 07:54

hi friend for reducing the computational cost you can use axisymetric mesh , and create a bubble as initial field

valgrinda · September 27, 2010, 08:59

Hei,

which numerical method for the phase interface do you use? I guess VOF or level set. In this case, you do not have to mesh the bubble geometry explicitly. Instead you give the bubble geometry as an initial boundary condition for either the volume fraction function or the level set function.

Cheers

Hans

September 22, 2010, 08:03	bubble rising in a column	#1
swamysrikanth New Member srikanth Join Date: Nov 2009 Posts: 22 Rep Power: 15	hello frnds, can anyone explain the way to mesh for bubble rising in a column. i want to study the dynamics of the bubble and deformation of bubble with time. i am confused with the part of creation of bubble...whether i have to create a bubble geometry or i can initialize the bubble injection through boundary conditions. how to do the meshing at critical path of bubble rising through the column... thanks in advance srikanth

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September 26, 2010, 07:54		#2
nimasam Senior Member Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,265 Blog Entries: 1 Rep Power: 23	hi friend for reducing the computational cost you can use axisymetric mesh , and create a bubble as initial field

September 27, 2010, 08:59		#3
valgrinda Super Moderator Hans Bihs Join Date: Jun 2009 Location: Trondheim, Norway Posts: 244 Rep Power: 16	Hei, which numerical method for the phase interface do you use? I guess VOF or level set. In this case, you do not have to mesh the bubble geometry explicitly. Instead you give the bubble geometry as an initial boundary condition for either the volume fraction function or the level set function. Cheers Hans