atl_initial_condition_module Module

Initial conditions describe all field variables at the beginning of the simulation.

They take the form of a spatial function. See tem_spatial_module for the definition of spatial functions. In their simplest form they can just be a constant value.

Usually, the variables of the field in the equation system need to be defined, but for nonlinear flow equations the primitive variables are required instead. Variables with multiple components need to be provided as individual spatial functions, and the names have an X, Y or Z appended to signify the respective directions.

An example initial condition with only constant values would look for flows as follows:

  initial_condition = {
    density = 1.0,
    velocityX = 0.0,
    velocityY = 0.0,
    velocityZ = 0.0,
    pressure = 1.0
  }

The initial condition will be evaluated pointwise and then transformed to a modal representation in Legendre polynomials.


Uses

Used by

  • module~~atl_initial_condition_module~~UsedByGraph module~atl_initial_condition_module atl_initial_condition_module module~atl_initialize_module atl_initialize_module module~atl_initialize_module->module~atl_initial_condition_module module~atl_program_module atl_program_module module~atl_program_module->module~atl_initialize_module program~atl_harvesting atl_harvesting program~atl_harvesting->module~atl_initialize_module program~atl_harvesting->module~atl_program_module program~ateles ateles program~ateles->module~atl_program_module

Subroutines

public subroutine atl_load_initial_condition(cube_container, equation, prj_pos, poly_proj_list, conf, LuaFile, tree)

subroutine to load the initial conditions from a lua configuration file.

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Arguments

Type IntentOptional Attributes Name
type(atl_cube_container_type), intent(inout) :: cube_container

Container which holds all cubic elements for the mesh.

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type(atl_Equations_type), intent(inout) :: equation

Description of the equations to solve.
integer, intent(in) :: prj_pos(tree%global%minLevel:tree%global%maxLevel)

Levelwise position pointer for the projection method used for IC
type(ply_poly_project_type), intent(inout) :: poly_proj_list(:)

unique list for projection methods
type(flu_State), intent(inout) :: conf

Handle, providing access to the configuration script
character(len=*), intent(in) :: LuaFile

Name of Lua configuration file.
type(treelmesh_type), intent(in) :: tree

Tree representation of your mesh.