Periodicity and symmetry boundary condition

Luis Delgado · June 19, 2014, 12:13

Hi,
I have a simple question: What is the difference between periodicity boundary condition and symmetry boundary condition. Thanks.
Luis

RodriguezFatz · June 20, 2014, 04:17

Hi,

For a periodic boundary condition you need two faces. Everything that leaves the domain through face A will directly enter the domain through face B.
Symmetry boundary condition means, that everything is symmetric at that face, which means a zero gradient for some values (Temperature, density, pressure, ...). All fluxes are zero here.

June 19, 2014, 12:13	Periodicity and symmetry boundary condition	#1
Luis Delgado New Member Luis Delgado Join Date: Oct 2013 Posts: 19 Rep Power: 13	Hi, I have a simple question: What is the difference between *periodicity boundary condition* and symmetry boundary condition. Thanks. Luis

June 20, 2014, 04:17		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 27	Hi, For a periodic boundary condition you need two faces. Everything that leaves the domain through face A will directly enter the domain through face B. Symmetry boundary condition means, that everything is symmetric at that face, which means a zero gradient for some values (Temperature, density, pressure, ...). All fluxes are zero here. __________________ The skeleton ran out of shampoo in the shower.

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