
Quick search LESARD: Boundary conditions¶ The modules related to the boundary conditions are stored in `SourceCode/ProblemDefinition/BoundaryConditions`. Each of the modules define a specific treatment to apply at the given boundary segment. The indexing of the boundary types is done in the `Mappers.py` file, while the application of the boundary treatment themselves is done through the routine `ApplyBCSState` defined in the module `SourceCode/_Solver/Solver_ApplyBCs` (see LESARD: Solving modules). Note The interface is always considered as passive, therefore no condition is applied within the computational domain. The boundary conditions are applied only to tagged boundaries according to the user wishes given in the problem’s definition. The degrees of freedom lying on the boundary that did not get tagged during the mesh generation process will be automatically treated as outflow. A general description of the minimal structure of a boundary condition file is described below, the respective description of each of the implemented routines is given at the bottom of the page. Page navigation Boundary condition framework Pre-defined boundary conditions Boundary condition framework ¶ All the boundary conditions present in the computational domain are applied by a the solver routine `ApplyBCSState` after having been selected by the user through an index mapping to all the used module of the form `ProblemDefinition/BoundaryConditions/$TheConditionName.py`, named accordingly the boundary conditions that are in use on the boundary segments. Any boundary condition is defined as a module itself containing the classes, whose structure should be given as follows. TheConditionName, specifying the nature and the application routine of the associated condition `3_LESARD.Templates.Template_BoundaryConditions.TheConditionName`(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, params)¶ Routine that does nothing, just here for you to modify at wish Parameters Problem* (Problem) – the considered problem Mesh (MeshStructure) – the considered mesh Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme)) Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs) FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers) Bd (integer) – the tag of the boundary the considered points are lying on BdIndex (integer list) – the list of indices of the degrees of freedom to treat Params (parameters) – (optional) as many parameters as one requires Returns the updated residuals in the same format as the given residuals Return type res (2D float numpy array) Pre-defined boundary conditions ¶ Note Templates for creating new boundary condition routines can be found in `Templates` folder. `3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Wall.Wall`(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, args)¶ Routine that does nothing, just lets outflow (there for compatibility) Parameters Problem* (Problem) – the considered problem Mesh (MeshStructure) – the considered mesh Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme)) Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs) FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers) Bd (integer) – the tag of the boundary the considered points are lying on BdIndex (integer list) – the list of indices of the degrees of freedom to treat Returns the updated residuals Return type res (2D float numpy array) Warning Only accepts horizontal and vertical wall, is not computing the curvy location-dependent impact (yet) Note args is here only for compatibility on call `3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Outflow.Outflow`(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, params)¶ Routine that does nothing, just lets outflow (there for compatibility) Parameters Problem (Problem) – the considered problem Mesh (MeshStructure) – the considered mesh Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme)) Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs) FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers) Bd (integer) – the tag of the boundary the considered points are lying on BdIndex (integer list) – the list of indices of the degrees of freedom to treat Returns the updated residuals Return type res (2D float numpy array) Note args is here only for compatibility on call class* `3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Inflow.Inflow`(Id, params)¶ Class furnishing the methods giving the shape of the inflow on a given boundary. Upon creation, stores in the field `Inflow` the routine itself, whose fixed parameters have been shortcut. Constant Parameters Id (integer) – the index corresponding to the equation of fluid the user wants when considering the governing equations given in this module and the associated fluid. Params* (list) – (optinal) the fixed arguments to pass to the function (see each of them for details) Methods `Constant`(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, Constant, args)¶ Inflows a constant at the given points Parameters Problem* (Problem) – the considered problem Mesh (MeshStructure) – the considered mesh Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme)) Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs) FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers) Bd (integer) – the tag of the boundary the considered points are lying on BdIndex (integer list) – the list of indices of the degrees of freedom to treat Constant (floar) – the constant value to add on the degrees of freedom Returns the updated residuals Return type res (2D float numpy array) Note args is here only for compatibility on call `3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Dirichlet.Dirichlet`(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, Value, params)¶ Routine that does nothing, just lets outflow (there for compatibility) Parameters Problem (Problem) – the considered problem Mesh (MeshStructure) – the considered mesh Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme)) Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs) FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers) Bd (integer) – the tag of the boundary the considered points are lying on BdIndex (integer list) – the list of indices of the degrees of freedom to treat Constant (floar) – the constant value to force on the degrees of freedom Returns the updated residuals Return type res (2D float numpy array) Note *args is here only for compatibility on call

LESARD: Boundary conditions¶

The modules related to the boundary conditions are stored in SourceCode/ProblemDefinition/BoundaryConditions. Each of the modules define a specific treatment to apply at the given boundary segment. The indexing of the boundary types is done in the Mappers.py file, while the application of the boundary treatment themselves is done through the routine ApplyBCSState defined in the module SourceCode/_Solver/Solver_ApplyBCs (see LESARD: Solving modules).

Note

The interface is always considered as passive, therefore no condition is applied within the computational domain.
The boundary conditions are applied only to tagged boundaries according to the user wishes given in the problem’s definition. The degrees of freedom lying on the boundary that did not get tagged during the mesh generation process will be automatically treated as outflow.

A general description of the minimal structure of a boundary condition file is described below, the respective description of each of the implemented routines is given at the bottom of the page.

Page navigation

Boundary condition framework
Pre-defined boundary conditions

Boundary condition framework ¶

All the boundary conditions present in the computational domain are applied by a the solver routine ApplyBCSState after having been selected by the user through an index mapping to all the used module of the form ProblemDefinition/BoundaryConditions/$TheConditionName.py, named accordingly the boundary conditions that are in use on the boundary segments.

Any boundary condition is defined as a module itself containing the classes, whose structure should be given as follows.

TheConditionName, specifying the nature and the application routine of the associated condition

3_LESARD.Templates.Template_BoundaryConditions.TheConditionName(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, *params)¶

Routine that does nothing, just here for you to modify at wish

Parameters

Problem (Problem) – the considered problem
Mesh (MeshStructure) – the considered mesh
Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme))
Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs)
FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers)
Bd (integer) – the tag of the boundary the considered points are lying on
BdIndex (integer list) – the list of indices of the degrees of freedom to treat
Params (parameters) – (optional) as many parameters as one requires

Returns

the updated residuals in the same format as the given residuals

Return type

res (2D float numpy array)

Pre-defined boundary conditions ¶

Note

Templates for creating new boundary condition routines can be found in Templates folder.

3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Wall.Wall(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, *args)¶

Routine that does nothing, just lets outflow (there for compatibility)

Parameters

Problem (Problem) – the considered problem
Mesh (MeshStructure) – the considered mesh
Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme))
Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs)
FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers)
Bd (integer) – the tag of the boundary the considered points are lying on
BdIndex (integer list) – the list of indices of the degrees of freedom to treat

Returns

the updated residuals

Return type

res (2D float numpy array)

Warning

Only accepts horizontal and vertical wall, is not computing the curvy location-dependent impact (yet)

Note

*args is here only for compatibility on call

3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Outflow.Outflow(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, *params)¶

Routine that does nothing, just lets outflow (there for compatibility)

Parameters

Problem (Problem) – the considered problem
Mesh (MeshStructure) – the considered mesh
Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme))
Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs)
FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers)
Bd (integer) – the tag of the boundary the considered points are lying on
BdIndex (integer list) – the list of indices of the degrees of freedom to treat

Returns

the updated residuals

Return type

res (2D float numpy array)

Note

*args is here only for compatibility on call

class 3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Inflow.Inflow(Id, *params)¶

Class furnishing the methods giving the shape of the inflow on a given boundary. Upon creation, stores in the field Inflow the routine itself, whose fixed parameters have been shortcut.

Constant

Parameters

Id (integer) – the index corresponding to the equation of fluid the user wants when considering the governing equations given in this module and the associated fluid.
Params (list) – (optinal) the fixed arguments to pass to the function (see each of them for details)

Methods

Constant(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, Constant, *args)¶

Inflows a constant at the given points

Parameters

Problem (Problem) – the considered problem
Mesh (MeshStructure) – the considered mesh
Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme))
Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs)
FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers)
Bd (integer) – the tag of the boundary the considered points are lying on
BdIndex (integer list) – the list of indices of the degrees of freedom to treat
Constant (floar) – the constant value to add on the degrees of freedom

Returns

the updated residuals

Return type

res (2D float numpy array)

Note

*args is here only for compatibility on call

3_LESARD.SourceCode.ProblemDefinition.BoundaryConditions.Dirichlet.Dirichlet(Problem, Mesh, Solution, Residuals, FluidId, Bd, BdIndex, Value, *params)¶

Routine that does nothing, just lets outflow (there for compatibility)

Parameters

Problem (Problem) – the considered problem
Mesh (MeshStructure) – the considered mesh
Solution (Solution) – the considered solution (as of the previous subtimestep (as used in the temporal scheme))
Residuals (2D numpy array) – the value of the currently computed residuals(NbVars x NbDofs)
FluidId (integer) – the index of the considered fluid (warning: NOT its value in mappers)
Bd (integer) – the tag of the boundary the considered points are lying on
BdIndex (integer list) – the list of indices of the degrees of freedom to treat
Constant (floar) – the constant value to force on the degrees of freedom

Returns

the updated residuals

Return type

res (2D float numpy array)

Note

*args is here only for compatibility on call

LESARD: Boundary conditions¶

Boundary condition framework¶

Pre-defined boundary conditions¶

Boundary condition framework ¶

Pre-defined boundary conditions ¶