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

 October 28, 2006, 00:33 wall shadow problem #1 paul Guest   Posts: n/a i have split rectangle with submerged cylindre where comes the flow , then i have got two cylindres,i haven't any problem with the top cylindre , my probleme is situated in the wall of the submerged cylindre , fluent create wall shadow and wall in the submerged cylindre, how to eliminate wall shadow. and if wall shadow affect the results? best regards

 October 30, 2006, 03:17 Re: wall shadow problem #2 Satish Guest   Posts: n/a wall shadow will be created by fluent, when a wall surface faces two different fluid volumes on both the sides of the surface. Fluent creates shadow when ever a surface faces two different fluid volumes on both the sides of the surface, because the fluid properties wont be the same in the case of different fluids and the wall shear stress on both the sides of the surface wont be the same because of two different fluids. This wall shadow disappears, when we make the wall surface to interior boundary condition. hamednoordoost@yahoo.com likes this.

 October 30, 2006, 08:39 Re: wall shadow problem #3 paul Guest   Posts: n/a you told me to put wall surface to interior but sir when i do this operation the wall surface disappears. this surface exists in my geometry i haven' a different fluid, the problem is created (wall shadow) because the surface separates the fluid . best regards

 October 30, 2006, 09:01 Re: wall shadow problem #4 Jason Guest   Posts: n/a If there's supposed to be a wall there, then the wall-shadow is not a problem. The wall shadow represents one side of the wall and the original wall BC represents the other side of the wall... Most of the BCs in Fluent are single sided, meaning they can only handle a fluid volume on one side. The wall BC is like this, so to deal with it, if Fluent finds a volume on both sides of a wall, it will create a wall-shadow BC. This will be no different than if you had a double-sided wall. There's more information on wall-shadows on the forum. If you need more info, try searching the forum. Best of luck, Jason

 November 2, 2006, 03:14 Re: wall shadow problem #5 satish Guest   Posts: n/a Hi Paul! If physically a wall exists in your fluid domain, then it wont be a problem, even the wall-shadow has been created. Give the surface wall boundary condition to the wall and to the wall-shadow..it wont create any issue in the analysis.

 November 16, 2013, 14:46 shadow generation problem in fluent #6 New Member   satish Join Date: Nov 2013 Posts: 2 Rep Power: 0 While generating a wall (which is in the shape of 8, my intention is to rotate this shape inside the duct having air as a fluid) there automatically a wall shadow is generated in the fluent, which is not desired. Sir! if you have any idea to resolve this problem please share it i will be very thankful.

 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 Yr0gErG FLUENT 3 June 12, 2013 02:12 Attesz CFX 7 January 5, 2013 04:32 aliemadi CFX 0 January 17, 2011 05:29 hills1 CFX 2 October 12, 2009 05:36 Sourabh Main CFD Forum 1 August 8, 2006 07:47

All times are GMT -4. The time now is 13:26.