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The user finds here the elements in order to understand how to build the wall boundary conditions.
The wall boundary conditions are defined with different types of namelists :
The namelists describing the type of wall boundary conditions applied to different physical quantities (temperature,velocity, species). This group of namelist is here named the “Wall Boundary Condition Type” (WBCT) :
The namelists defining the positions of walls that belong to the immersed bodies. Such a namelist is here named an “Immersed body descriptor” (IBD) :
The following points are really important to understand how to construct the wall boundary conditions.
A full set of wall boundary conditions (“WBCT”) is created when the namelists related to the heat, velocity or species have got the same name, namely when the common variable 'Wall_BC_DataSetName' is set with the same character string (see examples below).
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The walls placed at the ends of the domain are always linked to the WBCT whom Wall_BC_DataSetName= “Set1”.
Differents IBD can be linked to the same WBCT in order to prevent any redundant WBCT in the data file.
The explicit setting of a namelist can be omitted if the physical quantity is not required in the simulation. For example :
If an usual boundary condition are used for all the walls of the geometrical configuration, the associated namelist can be removed. For example :