Modelling the Support Mat in exhaust DPF

MukeshKarabash · May 16, 2014, 08:15

Hey everyone,
I am trying to analyze the flow distribution over DPF brick but i am not sure about how to model the mat. Should i model it as porous region like the brick or not? I need your help on this.

MukeshKarabash · May 28, 2014, 16:54

Anyone can help? This is really important.

me3840 · May 28, 2014, 17:19

You'll likely have to help us first, I don't know what a DPF brick is.

MukeshKarabash · May 29, 2014, 01:39

A DPF is diesel particulate filter which is a component used in order to lower the exhaust emission levels. In this component there is a brick which filters the particules in exhaust gas and this brick is rolled with a mat to keep it stable in the canning. I want to model the flow through DPF . The brick is modeled as porous region but i am not sure how to model the mat or should i ignore the mat at all.

ping · June 2, 2014, 04:13

i would think it depends how much flow goes through the mat versus just axially down the paths between the mat
if cross flow does happen and you need to model it then you could apply some appropriate porous coeficients in the radial directions

kguntur · June 2, 2014, 05:37

Hi,

As far as I know, the packing material around the DPF brick need not be modelled. Typically there is no flow through that.
However, if you are interested in computing the heat transfer, then the material might become important.

May 16, 2014, 08:15	Modelling the Support Mat in exhaust DPF	#1
MukeshKarabash New Member Join Date: Apr 2014 Posts: 6 Rep Power: 12	Hey everyone, I am trying to analyze the flow distribution over DPF brick but i am not sure about how to model the mat. Should i model it as porous region like the brick or not? I need your help on this.

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May 28, 2014, 16:54		#2
MukeshKarabash New Member Join Date: Apr 2014 Posts: 6 Rep Power: 12	Anyone can help? This is really important.

May 28, 2014, 17:19		#3
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	You'll likely have to help us first, I don't know what a DPF brick is.

May 29, 2014, 01:39		#4
MukeshKarabash New Member Join Date: Apr 2014 Posts: 6 Rep Power: 12	A DPF is diesel particulate filter which is a component used in order to lower the exhaust emission levels. In this component there is a brick which filters the particules in exhaust gas and this brick is rolled with a mat to keep it stable in the canning. I want to model the flow through DPF . The brick is modeled as porous region but i am not sure how to model the mat or should i ignore the mat at all.

June 2, 2014, 04:13		#5
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	i would think it depends how much flow goes through the mat versus just axially down the paths between the mat if cross flow does happen and you need to model it then you could apply some appropriate porous coeficients in the radial directions

June 2, 2014, 05:37		#6
kguntur Member kris Join Date: May 2014 Posts: 73 Rep Power: 11	Hi, As far as I know, the packing material around the DPF brick need not be modelled. Typically there is no flow through that. However, if you are interested in computing the heat transfer, then the material might become important.