modelling a packed bed in 2D

rajasekar.nitw@gmail.com · May 30, 2016, 07:48

Hi... I am having trouble creating a packed bed in fluent. I am working on chemical reactions occurring in different reactor beds.

I created a rectangular geometry and assigned default cell zone condition as fluid. In fluent under cell zone conditions, i gave different values for viscous resistance and inertial resistance for different void fraction. However my result is not changing with change in these parameters. Why is it so???

Is it the right way to design packed/fixed bed???

How can we assign solid species properties to the packing material???

Hope someones listening to me

jc2006 · May 30, 2016, 08:56

Hi Rajasekhar
I think you have adopt the "superficial velocity". you can try the "physical velocity"

rajasekar.nitw@gmail.com · May 30, 2016, 09:23

thnak you for your reply

What about assigning a solid properties for my packed material???

What should i give as inputs in cell zone conditions for material name and solid material name????

changing default solid material from aluminum to user defined platinum has any effect on final species reaction composition???

rajasekar.nitw@gmail.com · May 30, 2016, 10:34

Hi...

How do i assign solid properties which is platinum in my case in packed bed cell zone conditions.

solids materials name option at the end solves only for heat transfer problems whereas material name at the start is the fluid flowing through the medium.. correct me if i am wrong
porous.jpg

May 30, 2016, 07:48	modelling a packed bed in 2D	#1
rajasekar.nitw@gmail.com New Member Rajasekhar Join Date: May 2016 Posts: 3 Rep Power: 9	Hi... I am having trouble creating a packed bed in fluent. I am working on chemical reactions occurring in different reactor beds. I created a rectangular geometry and assigned default cell zone condition as fluid. In fluent under cell zone conditions, i gave different values for viscous resistance and inertial resistance for different void fraction. However my result is not changing with change in these parameters. Why is it so??? Is it the right way to design packed/fixed bed??? How can we assign solid species properties to the packing material??? Hope someones listening to me

May 30, 2016, 08:56		#2
jc2006 New Member J. David Join Date: May 2013 Posts: 10 Rep Power: 12	Hi Rajasekhar I think you have adopt the "superficial velocity". you can try the "physical velocity" rajasekar.nitw@gmail.com likes this.

May 30, 2016, 10:34	assigning solid properties	#4
rajasekar.nitw@gmail.com New Member Rajasekhar Join Date: May 2016 Posts: 3 Rep Power: 9	Hi... How do i assign solid properties which is platinum in my case in packed bed cell zone conditions. solids materials name option at the end solves only for heat transfer problems whereas material name at the start is the fluid flowing through the medium.. correct me if i am wrong porous.jpg

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Max.allowable flow rate in a packed bed	Mamata	FLUENT	3	May 29, 2017 12:33
porosity in packed bed with eulerian multiphase	Sree	FLUENT	1	April 15, 2015 06:17
urgent... multiphase cfd model of packed bed reactor.( VOF MODEL using)	balu@gold6	FLUENT	4	July 26, 2012 10:37
Packed bed using euler-euler	akm	FLUENT	0	May 28, 2010 05:40
powder accumulation of gassolid flow in packed bed	ben	CFX	0	July 3, 2006 21:37

May 30, 2016, 09:23		#3
rajasekar.nitw@gmail.com New Member Rajasekhar Join Date: May 2016 Posts: 3 Rep Power: 9	thnak you for your reply What about assigning a solid properties for my packed material??? What should i give as inputs in cell zone conditions for material name and solid material name???? changing default solid material from aluminum to user defined platinum has any effect on final species reaction composition???