Robin Boundary Condition

lindsayad · July 21, 2015, 18:42

Can someone suggest the most straightforward way to specify a Robin BC in OpenFOAM? It's not clear to me whether the mixed BC is equivalent to a Robin BC. In general I think of a mixed BC as being Dirichlet on one part of the boundary and Neumann on the other (this is also Wikipedia's definition). I've looked at a lot of old threads, and I've seen groovyBC mentioned a lot. However, it would surprise me if a somewhat external package is required in order to specify one of the three basic mathematical boundary conditions.

chriss85 · July 22, 2015, 03:55

Read here about mixed BC: http://www.cfd-online.com/Forums/ope...-mixed-bc.html

ahmmedshakil · July 22, 2015, 06:08

Quote:

Originally Posted by lindsayad

Can someone suggest the most straightforward way to specify a Robin BC in OpenFOAM? It's not clear to me whether the mixed BC is equivalent to a Robin BC. In general I think of a mixed BC as being Dirichlet on one part of the boundary and Neumann on the other (this is also Wikipedia's definition). I've looked at a lot of old threads, and I've seen groovyBC mentioned a lot. However, it would surprise me if a somewhat external package is required in order to specify one of the three basic mathematical boundary conditions.

Hi Alex,
You can easily plug-in the Robin BC using groovyBC.

Cheers
shakil

bingchuan · April 3, 2018, 09:22

Quote:

Originally Posted by lindsayad

Can someone suggest the most straightforward way to specify a Robin BC in OpenFOAM? It's not clear to me whether the mixed BC is equivalent to a Robin BC. In general I think of a mixed BC as being Dirichlet on one part of the boundary and Neumann on the other (this is also Wikipedia's definition). I've looked at a lot of old threads, and I've seen groovyBC mentioned a lot. However, it would surprise me if a somewhat external package is required in order to specify one of the three basic mathematical boundary conditions.

Dear Alex,

have you find a straightforward way to specify the Robin BC? Thanks.

bests
Bingchuan

keitaro7_14 · March 13, 2020, 06:22

The best explanation I found was this: https://foamingtime2.wordpress.com/s...oam/downloads/

The first pdf is brilliant. You can understand perfectly how to implement a robin condition in OF, using the mixed BC. You don't need any else.

July 21, 2015, 18:42	Robin Boundary Condition	#1
lindsayad New Member Alex Lindsay Join Date: May 2015 Posts: 1 Rep Power: 0	Can someone suggest the most straightforward way to specify a Robin BC in OpenFOAM? It's not clear to me whether the mixed BC is equivalent to a Robin BC. In general I think of a mixed BC as being Dirichlet on one part of the boundary and Neumann on the other (this is also Wikipedia's definition). I've looked at a lot of old threads, and I've seen groovyBC mentioned a lot. However, it would surprise me if a somewhat external package is required in order to specify one of the three basic mathematical boundary conditions.

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July 22, 2015, 03:55		#2
chriss85 Senior Member Join Date: Oct 2013 Posts: 397 Rep Power: 19	Read here about mixed BC: http://www.cfd-online.com/Forums/ope...-mixed-bc.html

March 13, 2020, 06:22		#5
keitaro7_14 Member JuanMi Join Date: Nov 2017 Posts: 41 Rep Power: 9	The best explanation I found was this: https://foamingtime2.wordpress.com/s...oam/downloads/ The first pdf is brilliant. You can understand perfectly how to implement a robin condition in OF, using the mixed BC. You don't need any else.