# Direction vectors in Porous Medium

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

January 7, 2015, 09:59
Direction vectors in Porous Medium
#1
New Member

Raj
Join Date: Jul 2014
Posts: 9
Rep Power: 5
hello everyone,
I am doing cfd analysis of simple rectangular duct with oil as fluid.Wavy type turbulators are inside the duct.I am using Porous model for pressure drop analysis(in Fluent 14.5) due to complex geometry of turbulator.

I am confusing about Direction -1 vector/Direction -2 vector/Direction 1,Direction 2 ,Direction 3.

I dont know how to enter resistance in direction Z considering flow direction for my geometry.I am attaching image file with this.

Thank you so so much in advance.
Attached Images
 Direction Vector.jpg (47.9 KB, 28 views)

 January 8, 2015, 03:44 #2 Senior Member   François Grégoire Join Date: Jan 2010 Location: Laval University, Canada Posts: 389 Rep Power: 10 Hi, Since the duct seems to be aligned with the coordinate axes (x, y, z), leave the default values Direction-1 Vector => X=1, Y=0, Z=0 Direction-2 Vector => X=0, Y=1, Z=0 Regarding the resistance, it depends on the properties of the porous material. If the material is isotropic, enter the same values for all directions.

 February 22, 2016, 14:10 #3 Member   Joe Join Date: Feb 2012 Location: Canada Posts: 93 Rep Power: 7 Hello! I have a question regards to the Direction-1 vector in a 2D axi-symmetric model in Fluent for a porous zone. I want to have viscous and inertial resistance in both x and y (basically axial and radial direction)...Do I need to set x=1 ,y=0 or x=1, y=1 in Direction-1 vector section? I think it should be x=1, y=0 for Direction-1 vector and fluent automatically consider x=0,y=1 for Direction-2 vector which is not shown explicitly. Thank you, Hooman

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Chander CFX 3 July 23, 2014 06:32 hitchenxue FLUENT 2 April 30, 2014 00:10 Toplaa FLUENT 0 August 16, 2013 14:22 Chander CFX 3 March 11, 2012 22:18 Valeria FLUENT 1 July 10, 2009 03:58

All times are GMT -4. The time now is 19:10.