# Non reflecting boundary condition

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 February 27, 2009, 02:52 Non reflecting boundary condition #1 Saeid Guest   Posts: n/a I wanna define nonreflecting boundary condition for numerical simulation on wall. I know we can absorb wave with porous wall but i wanna define a boundary condition which absorb shock wave without mass diffusion. Do you have any experience about it? could you please help me about it. I try some numerical method such as characteristic method, .. but when i defined it,it reflect shock waves. I've studied the articles by K.W. Thompson: Time dependent boundary conditions for hyperbolic systems I & II but this kind of boundry condtion define just for outlet or inlet i wanna to denfine it (( on wall )). I Know about sponge layer but this kind of boundary condition need some space to decrease amplitude of wave but i wanna define a wall which doesnt have any diffusion of mass. thanks

 February 27, 2009, 15:07 Re: Non reflecting boundary condition #2 Harish Guest   Posts: n/a You can use the ghost points boundary condition of Dong and Tam for cartesian coordinates or the ghost point BC of Hixon ( AIAA) for curvilinear coordinates. Both the BC has been defined to implement high order wall boundary conditions required to prevent the contamination of the solution in Computational Aeroacoustics when high-order finite difference schemes are employed. Also you can look for the papers by Kim et. al from UK for implementation of characteristic boundary conditions with inclusion of non linear terms and the paper by Poinsot and Lele (1992, JCP) for the same but including only linear terms. Harish PS: I do not have the papers. Search wall boundary condition or boundary conditions for compressible flows in google scholar to find the exact paper names.

 January 15, 2010, 13:18 non reflecting boundary condition in a wave tank #3 New Member   Elahe Join Date: Oct 2009 Posts: 21 Rep Power: 8 Hi saeid i wanna define nonreflecting boundary condition for numerical simulation a wave tank but i do not know how i can do it, could you please help me about this, all the best elahe

 January 15, 2010, 13:21 #4 New Member   Elahe Join Date: Oct 2009 Posts: 21 Rep Power: 8 Hi saeid i forgot that say about the software i work by it. it is fluent. did you work with it until now? thank you in advance elahe

 March 19, 2011, 18:08 #5 Senior Member   Henry Arrigo Join Date: Jun 2010 Location: Italy Posts: 100 Rep Power: 7 Hello all, Has any one come up with a resolution for non-reflecting boundary condition? Preferably I need to know how to impose a numerical beach in the domain. Regards. Henry.

 March 19, 2011, 21:15 #6 Senior Member   Ahmed Join Date: Mar 2009 Location: NY Posts: 250 Rep Power: 9

April 13, 2014, 06:55
#7
Member

CFDUser
Join Date: Mar 2014
Posts: 55
Rep Power: 4
Quote:
 Originally Posted by Ahmed http://my.fit.edu/itresources/manual...ug/node289.htm

April 13, 2014, 07:12
#8
Super Moderator

Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 9,219
Blog Entries: 35
Rep Power: 94
Quote:
 Originally Posted by CFDUser_ Link not working
Quick answer - Use Google to search for:
Code:
`fluent non-reflecting boundary condition`

April 13, 2014, 07:19
#9
Member

CFDUser
Join Date: Mar 2014
Posts: 55
Rep Power: 4
Quote:
 Originally Posted by wyldckat Quick answer - Use Google to search for: Code: `fluent non-reflecting boundary condition`
Sorry, but im looking for OpenFOAM non-reflecting boundary conditions.

April 13, 2014, 13:29
#10
Super Moderator

Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 9,219
Blog Entries: 35
Rep Power: 94
Quote:
 Originally Posted by CFDUser_ Sorry, but im looking for OpenFOAM non-reflecting boundary conditions.
Well, the answer I gave was regarding the missing link, which is pointing to a broken link of an online manual of Fluent 6.3.
Sorry that it's not what you're looking for (nor did you originally state what you were looking for), but it's what the link would have given you if it was working.

 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 Saturn CFX 45 February 8, 2016 05:42 Thomas P. Abraham Main CFD Forum 20 July 7, 2013 05:05 murali CFX 5 August 3, 2012 08:56 gameoverli OpenFOAM Pre-Processing 1 May 21, 2009 08:28 adarsh Main CFD Forum 1 May 30, 2002 10:27

All times are GMT -4. The time now is 18:46.

 Contact Us - CFD Online - Top