Problem with boundary type

October 10, 2005, 12:13

Hi

I am modelling a mould...in which the fluid is static..Can someone help me with what type of boundary type should be defined for such a fluid?

October 11, 2005, 07:44

Hi

For which equation do you need boundary condition. If it is N-S, then boudnary conditions will simply be no-slip at boundary. You can directly use Dirchilet condition. If it is Temperature boundary condition then you have to use either Neumann, or Robin's; Robin's will be better.

Vinod Dhiman

moun139 · May 27, 2012, 05:19

Hi,

I want to introduce robin's boundary condition ,i wrote a UDF profile wich decrib it .When i interpreta it and hook it at wall boundary condition ,after lunch iteration ,fluent display : Error: Floating point error: invalid number ,and there is note a coenvergence.

Please what is the problem ,can you help me?

thx

October 10, 2005, 12:13	Problem with boundary type	#1
Shanti Guest Posts: n/a	Hi I am modelling a mould...in which the fluid is static..Can someone help me with what type of boundary type should be defined for such a fluid?

October 11, 2005, 07:44	Re: Problem with boundary type	#2
Vinod Dhiman Guest Posts: n/a	Hi For which equation do you need boundary condition. If it is N-S, then boudnary conditions will simply be no-slip at boundary. You can directly use Dirchilet condition. If it is Temperature boundary condition then you have to use either Neumann, or Robin's; Robin's will be better. Vinod Dhiman

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Commercial meshers] Using starToFoam	clo	OpenFOAM Meshing & Mesh Conversion	33	September 26, 2012 05:04
Boundary condition setting for non-premixed combustion using reactingFoam	skyopener	OpenFOAM	0	May 23, 2010 23:55
pipe flow with heat transfer	Fabian	OpenFOAM	2	December 12, 2009 05:53
transient simulation of a rotating rectangle	icesniffer	CFX	1	August 8, 2009 08:25
New topic on same subject - Flow around race car	Tudor Miron	CFX	15	April 2, 2004 07:18

May 27, 2012, 05:19		#3
moun139 New Member moon Join Date: Feb 2012 Posts: 26 Rep Power: 15	Hi, I want to introduce robin's boundary condition ,i wrote a UDF profile wich decrib it .When i interpreta it and hook it at wall boundary condition ,after lunch iteration ,fluent display : Error: Floating point error: invalid number ,and there is note a coenvergence. Please what is the problem ,can you help me? thx