Boundary conditions mechanisms for cell scalars. More...

Namespaces
module	mod_explicit_add_cell_bc_nh
	Fill ghost nodes with homogeneous Neumann boundary conditions for cell scalars.

Functions
subroutine	mod_apply_bc_on_ghost_b_cells::apply_bc_on_ghost_b_cells_rec (array, boundary_condition)
	Apply boundary conditions on extra ghost cells on an array defined on cells.

double precision function	mod_compute_uncentered_boundary_cell_gradient::compute_uncentered_boundary_cell_gradient (t0, t1, t2, boundary)
	Compute field gradient at a global physical boundary.

subroutine	mod_copy_data_on_ghost_boundary_cells::copy_data_on_ghost_boundary_cells (array)
	Copy cell array values on ghost nodes behind physical boundaries.

pure subroutine	mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank3_integer (array)
	Copy the values in the ghost cells in the periodic directions when the number of processes in the same direction is equal to one.

pure subroutine	mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank3_double (array)
	Copy the values in the ghost cells in the periodic directions when the number of processes in the same direction is equal to one.

pure subroutine	mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank3_logical (array)
	Copy the values in the ghost cells in the periodic directions when the number of processes in the same direction is equal to one.

pure subroutine	mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank4_integer (array)
	Copy the values in the ghost cells in the periodic directions when the number of processes in the same direction is equal to one.

pure subroutine	mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank4_double (array)
	Copy the values in the ghost cells in the periodic directions when the number of processes in the same direction is equal to one.

pure subroutine	mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank4_logical (array)
	Copy the values in the ghost cells in the periodic directions when the number of processes in the same direction is equal to one.

Detailed Description

Boundary conditions mechanisms for cell scalars.

This directory contains several types of routines:

routines to apply explicitly boundary conditions and fill boundary ghost cells (see: apply_bc_on_ghost_b_cells);
routines to compute explicitly quantities on physical boundaries.

Function Documentation

◆ apply_bc_on_ghost_b_cells_rec()

subroutine mod_apply_bc_on_ghost_b_cells::apply_bc_on_ghost_b_cells_rec	(	double precision, dimension(:,:,:), intent(inout)	array,
		type(t_boundary_condition), intent(in)	boundary_condition )

private

Apply boundary conditions on extra ghost cells on an array defined on cells.

Parameters

[in,out]	array	an array defined on cells
[in]	boundary_condition	boundary_condition

Following implicit discretization's Implicit boundary condition treatment, this routine follows the same logic as mod_add_cell_bc_noghost::add_cell_bc_noghost to compute the weights in order to apply boundary conditions on ghost cells. Then, it simply evaluates the polynomial at ghost cell locations to set their values.

Given the weights table \( \omega_{g_i} \), the value is computed as:

\[ \overline{S}_{g_i} = \sum_{k=0}^{p-1} \omega_k^{(i)} \,\overline{S}_{i_k} + \omega_g^{(i)} \, g. \]

◆ compute_uncentered_boundary_cell_gradient()

double precision function mod_compute_uncentered_boundary_cell_gradient::compute_uncentered_boundary_cell_gradient	(	double precision, intent(in)	t0,
		double precision, intent(in)	t1,
		double precision, intent(in)	t2,
		integer, intent(in)	boundary )

Compute field gradient at a global physical boundary.

The field gradient at a global physical boundary is computed using second-order accurate Lagrange polynomials. For instance, the following sampling is used at the left boundary:

 values:   t0  t1      t2
           ├───×───┼───×───┼──
 indices:      is    is+1

or at the right boundary:

 values:                       t2      t1  t0
                         ──┼───×───┼───×───┤
 indices:                    ie-1      ie

Compute uncentered second order cell gradient on a boundary

◆ copy_data_on_ghost_boundary_cells()

subroutine mod_copy_data_on_ghost_boundary_cells::copy_data_on_ghost_boundary_cells ( double precision, dimension(nx,ny,nz), intent(inout) array )

Copy cell array values on ghost nodes behind physical boundaries.

◆ exchange_periodic_ghost_cells_rank3_double()

pure subroutine mod_exchange_periodic_ghost_cells::exchange_periodic_ghost_cells_rank3_double ( double precision, dimension(:,:,:), intent(inout) array )