problem with specifying material properties

cavani · March 7, 2011, 12:27

I am trying to simulate the flow of cement through a pipe.

I need to specify the material properties for cement as having an average particle size of 25 microns and a particle density of 2500 kg/m^3.

I have created a material named "cement" but I am unable to find the appropriate entry boxes for 'particle size' and 'particle density', and these are the only properties I have been given for my assignment. Is there anyway I can do this? Is there any part of the ANSYS Help menus you could direct me to that might help with this?

Any help would be greatly appreciated.

P.S If you read this and are unable to provide an answer or you think my problem is impossible can you please explain in some way. Thanks.

ghorrocks · March 7, 2011, 19:40

There are many different ways of specifying multiphase materials like cement. What type of model do you intend to run? What are you trying get out of the simulation? This determines what physical models you need to use, and that determines the way to specify the material properties.

cavani · March 8, 2011, 08:37

I am measuring 'line pressure drop' and 'solids mass flow rate' of cement through a 2m pipe of diameter 53mm.

The specifications of my assignment are taken from a report based on the use of Fluent which models an identical simulation i.e 2m pipe, cement etc...

The Fluent based report used the "Eulerian model" which is 1 of 3 Euler-Euler multiphase models in Fluent.

I have no other specs. for the cement material other than what I originally stated above.

If this is not enough information to solve my problem can you please advise me on what I need to find out?

ghorrocks · March 8, 2011, 18:03

In that case wouldn't it be easiest to use the same approach in CFX as was done in Fluent?

cavani · March 8, 2011, 18:50

I'm not sure how to achieve what was done in the Fluent approach, in CFX.

I'm unable to find the settings. I can't find the entry fields to enter the cement properties (particle size and particle density).

ghorrocks · March 9, 2011, 19:36

Have you done the CFX tutorials? There are several examples of multiphase flow modelling and that should give you a starting point.

March 7, 2011, 12:27	problem with specifying material properties	#1
cavani New Member Chris Cavani Join Date: Jan 2011 Posts: 20 Rep Power: 15	I am trying to simulate the flow of cement through a pipe. I need to specify the material properties for cement as having an average particle size of 25 microns and a particle density of 2500 kg/m^3. I have created a material named "cement" but I am unable to find the appropriate entry boxes for 'particle size' and 'particle density', and these are the only properties I have been given for my assignment. Is there anyway I can do this? Is there any part of the ANSYS Help menus you could direct me to that might help with this? Any help would be greatly appreciated. P.S If you read this and are unable to provide an answer or you think my problem is impossible can you please explain in some way. Thanks. Last edited by cavani; March 7, 2011 at 14:06. Reason: added "P.S"

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March 7, 2011, 19:40		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	There are many different ways of specifying multiphase materials like cement. What type of model do you intend to run? What are you trying get out of the simulation? This determines what physical models you need to use, and that determines the way to specify the material properties.

March 8, 2011, 08:37		#3
cavani New Member Chris Cavani Join Date: Jan 2011 Posts: 20 Rep Power: 15	I am measuring 'line pressure drop' and 'solids mass flow rate' of cement through a 2m pipe of diameter 53mm. The specifications of my assignment are taken from a report based on the use of Fluent which models an identical simulation i.e 2m pipe, cement etc... The Fluent based report used the "Eulerian model" which is 1 of 3 Euler-Euler multiphase models in Fluent. I have no other specs. for the cement material other than what I originally stated above. If this is not enough information to solve my problem can you please advise me on what I need to find out?

March 8, 2011, 18:03		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	In that case wouldn't it be easiest to use the same approach in CFX as was done in Fluent?

March 8, 2011, 18:50		#5
cavani New Member Chris Cavani Join Date: Jan 2011 Posts: 20 Rep Power: 15	I'm not sure how to achieve what was done in the Fluent approach, in CFX. I'm unable to find the settings. I can't find the entry fields to enter the cement properties (particle size and particle density).

March 9, 2011, 19:36		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	Have you done the CFX tutorials? There are several examples of multiphase flow modelling and that should give you a starting point.