# Porous-Jump Problem

 Register Blogs Members List Search Today's Posts Mark Forums Read

March 21, 2018, 12:11
Porous-Jump Problem
#1
New Member

Uğur Demir
Join Date: Jan 2016
Location: Turkey
Posts: 10
Rep Power: 10
Hello,

I am having a problem in making porous-jump boundary condition. I need to use porous-jump for my 3D HVAC analysis.

How do i model my geometry?

Do i need 2 part body? or do i need surface body?

Thank You
Attached Images
 3.JPG (54.8 KB, 10 views) 1.JPG (56.8 KB, 10 views) 2.JPG (27.3 KB, 10 views)

 March 22, 2018, 05:33 #2 Member   ehsan Join Date: Sep 2014 Posts: 38 Rep Power: 11 Hi, You do not need 2 parts. Make one part and change the corresponding geometry (wall or interface) to the porous jump BC. sherlock likes this.

March 22, 2018, 09:48
#3
New Member

Uğur Demir
Join Date: Jan 2016
Location: Turkey
Posts: 10
Rep Power: 10
Quote:
 Originally Posted by e_cfd Hi, You do not need 2 parts. Make one part and change the corresponding geometry (wall or interface) to the porous jump BC.
But i cannot choose the surface for porous jump in one part. I attached a very simple geometry for same case. I guess porous jump would be surface?

Can you share a simple geometry with porous-jump boundary condition?
Attached Images
 mesh 22.jpg (105.5 KB, 12 views)

 March 23, 2018, 03:49 #4 Member   ehsan Join Date: Sep 2014 Posts: 38 Rep Power: 11 Dear Sherlock, For example, in the last image you attached, it seems that you have 2 parts. you need to select these two parts from "the tree outline/parts" in the design modeler (from workbench). Now click right and form a new part. Then you would have two bodies but one part. Now you have just one interface between these two bodies and also your mesh would be conformal. this interface would be the porous-jump boundary (you have to change it in the Fluent/boundary conditions from interior to he porous-jum BC). sherlock likes this.

March 23, 2018, 04:04
#5
New Member

Uğur Demir
Join Date: Jan 2016
Location: Turkey
Posts: 10
Rep Power: 10
Quote:
 Originally Posted by e_cfd Dear Sherlock, For example, in the last image you attached, it seems that you have 2 parts. you need to select these two parts from "the tree outline/parts" in the design modeler (from workbench). Now click right and form a new part. Then you would have two bodies but one part. Now you have just one interface between these two bodies and also your mesh would be conformal. this interface would be the porous-jump boundary (you have to change it in the Fluent/boundary conditions from interior to he porous-jum BC).
Dear Ehsan,

It works. I always tried to use Boolean Operations to make one part. But it deletes the interface.

Thank you very much.

 Tags grille hvac bc, grilles, hvac, porous jump, porous jump bc