What is the difference between pore diameter and particle diameter in porous media?

Emara · January 9, 2016, 07:49

I am modelling metal foam in fluent (Porous model) and I need to know the difference between pore diameter and particle diameter in porous media? And the difference between porosity and particle per inch designation and how to find the other when I have only one?

Thanks in advance

Rayman · January 10, 2016, 06:30

Hi Emara

Sorry, I am like you new here and in Fluent. But, as you are working with CFD in porous media, I just thought maybe I can ask you a question: how and where did u put porosity in fluent? How about cylindrical flow direction (do you know how we can consider that)? Thanks.

Emara · January 10, 2016, 10:42

Hello Rayman,

Once you defined your porous zone in "Cell Zone Conditions", you can click "Edit" and then a window will appear, you shall check "Porous Zone" and under the "Porous Zone" tab you shall find "porosity" at the bottom of the window.

Rayman · January 10, 2016, 10:45

Thanks Emara, yes I know but i think that is fluid porosity and should be 1 always. Am i wrong?

Emara · January 10, 2016, 10:51

No, it shouldn't. That's the value of your region's porosity (epsilon in the averaged governing equations). The "1.0" value means all fluid and 0 means all solid.

Rayman · January 10, 2016, 10:55

Dear Emara! Thanks. Do u know how to make a profile? Maybe we can be connected for easier discussion on cfd by email if u dont mind: rahman.ashena.313@gmail.com. I really appreciate it.

Emara · January 10, 2016, 11:01

Sure, check your private messages inbox.

January 9, 2016, 07:49	What is the difference between pore diameter and particle diameter in porous media?	#1
Emara New Member Join Date: Aug 2011 Posts: 13 Rep Power: 14	I am modelling metal foam in fluent (Porous model) and I need to know the difference between pore diameter and particle diameter in porous media? And the difference between porosity and particle per inch designation and how to find the other when I have only one? Thanks in advance

January 10, 2016, 06:30	Fluent for Porous Media	#2
Rayman New Member Ray Join Date: Nov 2015 Posts: 17 Rep Power: 10	Hi Emara Sorry, I am like you new here and in Fluent. But, as you are working with CFD in porous media, I just thought maybe I can ask you a question: how and where did u put porosity in fluent? How about cylindrical flow direction (do you know how we can consider that)? Thanks.

January 10, 2016, 10:45	fluent porous	#4
Rayman New Member Ray Join Date: Nov 2015 Posts: 17 Rep Power: 10	Thanks Emara, yes I know but i think that is fluid porosity and should be 1 always. Am i wrong?

January 10, 2016, 10:55	fluent	#6
Rayman New Member Ray Join Date: Nov 2015 Posts: 17 Rep Power: 10	Dear Emara! Thanks. Do u know how to make a profile? Maybe we can be connected for easier discussion on cfd by email if u dont mind: rahman.ashena.313@gmail.com. I really appreciate it.

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January 10, 2016, 10:42		#3
Emara New Member Join Date: Aug 2011 Posts: 13 Rep Power: 14	Hello Rayman, Once you defined your porous zone in "Cell Zone Conditions", you can click "Edit" and then a window will appear, you shall check "Porous Zone" and under the "Porous Zone" tab you shall find "porosity" at the bottom of the window.

January 10, 2016, 10:51		#5
Emara New Member Join Date: Aug 2011 Posts: 13 Rep Power: 14	No, it shouldn't. That's the value of your region's porosity (epsilon in the averaged governing equations). The "1.0" value means all fluid and 0 means all solid.

January 10, 2016, 11:01		#7
Emara New Member Join Date: Aug 2011 Posts: 13 Rep Power: 14	Sure, check your private messages inbox.

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