"3" phase flow, modeling a toilet

sandeseb · September 11, 2012, 10:10

Hello users,

I´m relative new in the CFD topic, nevertheless I got the job to investigate the flushing of toilets.
My questions are:

Is it generally possible to simulate the flushing of toilets including solid parts (feces)? This would be a "3 phase" problem (water, solid and air at the surface), in my opinion.

Which program would you suggest for solving this problem?
I have solutions from CD Adapco, Ansys, CF Design and Mentor Graphics in my eyes.

Also the program should have an interface or the possibility to use CATIA V5 models.

I think, this is a tough job, isn´t it?

Thank you in advance for your help.

Best regards
Sebastian

sandeseb · September 13, 2012, 02:57

Hi again,

has no one an idea? Or just some hints for me on which points I have to look by choosing the software.

Thanks
Sebastian

JBeilke · September 13, 2012, 04:00

I would try it with a particle based solver. You might check xflow.

http://www.youtube.com/watch?v=Se4v-QRWtYA
http://www.youtube.com/watch?v=aCz8zt-V-TM

sandeseb · September 17, 2012, 03:17

Hey there,

thank you for this hind.
I will contact them.

Best regards
Sebastian

wangguobin14 · October 30, 2012, 03:37

flow3d may give you answer

thiagopl · October 30, 2012, 14:50

You could adopt the diarrhea hypothesis, then you would eliminate the solid issue.

Sorry, just kidding.

evcelica · October 31, 2012, 16:56

Wouldn't you rather conduct real world experiments instead of simulations?

Ahmed · October 31, 2012, 22:08

Previous investigations suggest that it is a 2 phase flow,
Google using the following search criteria "slug flow Toilet flushing cfd"
good luck

September 11, 2012, 10:10	"3" phase flow, modeling a toilet	#1
sandeseb New Member SandeSeb Join Date: Sep 2012 Posts: 3 Rep Power: 14	Hello users, I´m relative new in the CFD topic, nevertheless I got the job to investigate the flushing of toilets. My questions are: Is it generally possible to simulate the flushing of toilets including solid parts (feces)? This would be a "3 phase" problem (water, solid and air at the surface), in my opinion. Which program would you suggest for solving this problem? I have solutions from CD Adapco, Ansys, CF Design and Mentor Graphics in my eyes. Also the program should have an interface or the possibility to use CATIA V5 models. I think, this is a tough job, isn´t it? Thank you in advance for your help. Best regards Sebastian

October 30, 2012, 14:50		#6
thiagopl Member Thiago Parente Lima Join Date: Sep 2011 Location: Diamantina, Brazil. Posts: 65 Rep Power: 15	You could adopt the diarrhea hypothesis, then you would eliminate the solid issue. Sorry, just kidding. atmcfd likes this.

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September 13, 2012, 02:57		#2
sandeseb New Member SandeSeb Join Date: Sep 2012 Posts: 3 Rep Power: 14	Hi again, has no one an idea? Or just some hints for me on which points I have to look by choosing the software. Thanks Sebastian

September 13, 2012, 04:00		#3
JBeilke Senior Member Joern Beilke Join Date: Mar 2009 Location: Dresden Posts: 528 Rep Power: 20	I would try it with a particle based solver. You might check xflow. http://www.youtube.com/watch?v=Se4v-QRWtYA http://www.youtube.com/watch?v=aCz8zt-V-TM

September 17, 2012, 03:17		#4
sandeseb New Member SandeSeb Join Date: Sep 2012 Posts: 3 Rep Power: 14	Hey there, thank you for this hind. I will contact them. Best regards Sebastian

October 30, 2012, 03:37		#5
wangguobin14 New Member 王国斌 Join Date: Jun 2010 Location: beij,chongqing,Chengdu Posts: 22 Rep Power: 16	flow3d may give you answer

October 31, 2012, 16:56		#7
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,186 Rep Power: 23	Wouldn't you rather conduct real world experiments instead of simulations?

October 31, 2012, 22:08		#8
Ahmed Senior Member Ahmed Join Date: Mar 2009 Location: NY Posts: 251 Rep Power: 18	Previous investigations suggest that it is a 2 phase flow, Google using the following search criteria "slug flow Toilet flushing cfd" good luck