bubbleFoam

Yas · August 15, 2010, 17:32

Hello Everyone. I am using bubbleFoam solver to simulate a 2-D bubble collumn, I have modified the mesh so it is a rectangular domain and the air is coming from a fraction of the bottom of the domain. I was wonderinf if anyone can explain what is the difference between 0 and 0.org directories in bubbleColumn example? Thank you.

nimasam · August 15, 2010, 22:32

hi friend
0.org is the original folder which contains the initial condition for each variable but for better convergence they let the solver run and use other time directory as directory 0 and change directory 0 to 0.org!!!!!!!
look in dictionary 0 you can see variables are non-uniform but in 0.org variables are uniform !!!!!!!!!
so as conclusion

in ur SITUATION 0.org doesn't play any role!!!!!

Yas · August 15, 2010, 22:44

Thank you for your reply. So I have got to get rid of all the values and just stick to the general initial conditions, am I right? My problem is that I have changed the mesh into a 2-D mesh which is basically three rectangulars attached to each other and the bubbles are rising from the mid rectangular. It works fine but I have lost the top air layer and I don't know why and how I can fix it.

nimasam · August 15, 2010, 22:57

just delete 0 directory and rename 0.org to 0 then run ur solver it should be work

Yas · August 16, 2010, 20:09

I did but I am still missing the air layer on the top! Also have you got any idea on how to change the simulation from laminar to turbulent? I have turned on the turbulent option and selected k-epsilon method but am a bit lost on how to change the initial condition of k and epsilon. Thank you in advance for your help.

August 15, 2010, 17:32	bubbleFoam	#1
Yas New Member Join Date: Aug 2010 Posts: 4 Rep Power: 16	Hello Everyone. I am using bubbleFoam solver to simulate a 2-D bubble collumn, I have modified the mesh so it is a rectangular domain and the air is coming from a fraction of the bottom of the domain. I was wonderinf if anyone can explain what is the difference between 0 and 0.org directories in bubbleColumn example? Thank you.

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August 15, 2010, 22:32		#2
nimasam Senior Member Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,267 Blog Entries: 1 Rep Power: 25	hi friend 0.org is the original folder which contains the initial condition for each variable but for better convergence they let the solver run and use other time directory as directory 0 and change directory 0 to 0.org!!!!!!! look in dictionary 0 you can see variables are non-uniform but in 0.org variables are uniform !!!!!!!!! so as conclusion in ur SITUATION 0.org doesn't play any role!!!!!

August 15, 2010, 22:44		#3
Yas New Member Join Date: Aug 2010 Posts: 4 Rep Power: 16	Thank you for your reply. So I have got to get rid of all the values and just stick to the general initial conditions, am I right? My problem is that I have changed the mesh into a 2-D mesh which is basically three rectangulars attached to each other and the bubbles are rising from the mid rectangular. It works fine but I have lost the top air layer and I don't know why and how I can fix it.

August 15, 2010, 22:57		#4
nimasam Senior Member Nima Samkhaniani Join Date: Sep 2009 Location: Tehran, Iran Posts: 1,267 Blog Entries: 1 Rep Power: 25	just delete 0 directory and rename 0.org to 0 then run ur solver it should be work

August 16, 2010, 20:09		#5
Yas New Member Join Date: Aug 2010 Posts: 4 Rep Power: 16	I did but I am still missing the air layer on the top! Also have you got any idea on how to change the simulation from laminar to turbulent? I have turned on the turbulent option and selected k-epsilon method but am a bit lost on how to change the initial condition of k and epsilon. Thank you in advance for your help.