field_following.F90 File Reference

#include "adios_macro.h"

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Functions/Subroutines
subroutine	write_ff (grid, psn)
	Initialize the field-aligned mapping between adjacent planes. The routine traces magnetic field lines from each vertex of a plane in both toroidal directions to the adjacent mid-planes and full-step planes, records the triangle in which the field line intersects these planes and the corresponding interpolation weights. More...
subroutine	check_ff_property (grid, psn)
	check field-following property using psnff_hdp_p and psnff_1dp_p print out statistical information from p distribution More...
subroutine	cnvt_grid_ff2real (grid, tr, p, var_ff, var_real)
	Coordinate conversion from field following representation (two points on adjacent planes connected by a magnetic field line have the same radial-poloidal array index) to real space representation (points with the same R-Z coordinates have the same radial poloidal array index). More...
subroutine	cnvt_grid_real2ff (grid, tr, p, var_real, var_ff)
	Coordinate conversion from real space representation (points with the same R-Z coordinates have the same radial poloidal array index) to field following representation (two points on adjacent planes connected by a magnetic field line have the same radial-poloidal array index). More...
subroutine	bfollow_test (xp, xm, grid)
	Test of the quality of the field-alignment of the mesh (?]. More...
subroutine	field_following_pos (x_org, phi, dir, w, delta_phi, x_dest)
	Project the input (R,phi,Z) coordinates along the magnetic field to a different toroidal angle. High-level routine. More...
subroutine	field_following_pos2 (x_org, phi_org, phi_dest, x_dest)
	Project the input (R,phi,Z) coordinates along the magnetic field to a different toroidal angle. High-level routine. More...
subroutine	derivs (x, phi, dx)

Function/Subroutine Documentation

subroutine bfollow_test	(	real (kind=8), dimension(2,grid%nnode)	xp,
		real (kind=8), dimension(2,grid%nnode)	xm,
		type(grid_type)	grid
	)

Test of the quality of the field-alignment of the mesh (?].

Parameters

[in]	grid	XGC grid data object, type(grid_type)
[in]	xp	(R,Z) coordinates on right plane (?], real(8)
[in]	xm	(R,Z) coordinates on left plane (?], real(8)

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subroutine check_ff_property	(	type(grid_type)	grid,
		type(psn_type)	psn
	)

check field-following property using psnff_hdp_p and psnff_1dp_p print out statistical information from p distribution

Parameters

[in]	grid	XGC grid object, type(grid_type)
[out]	psn	XGC field data object, type(psn_type)

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subroutine cnvt_grid_ff2real	(	type(grid_type), intent(in)	grid,
		integer, dimension(grid%nnode,0:1), intent(in)	tr,
		real (8), dimension(3,grid%nnode,0:1), intent(in)	p,
		real (8), dimension(grid%nnode,0:1), intent(in)	var_ff,
		real (8), dimension(grid%nnode,0:1), intent(out)	var_real
	)

Coordinate conversion from field following representation (two points on adjacent planes connected by a magnetic field line have the same radial-poloidal array index) to real space representation (points with the same R-Z coordinates have the same radial poloidal array index).

Parameters

[in]	grid	XGC grid data object, type(grid_type)
[in]	tr	Triangle indices for transformation, integer
[in]	p	Interpolation weights corresponding to the triangle indices, real(8)
[in]	var_ff	Input data in field-aligned representation, real(8)
[out]	var_real	Output data in real-space representation

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subroutine cnvt_grid_real2ff	(	type(grid_type), intent(in)	grid,
		integer, dimension(grid%nnode,0:1), intent(in)	tr,
		real (8), dimension(3,grid%nnode,0:1), intent(in)	p,
		real (8), dimension(grid%nnode,0:1), intent(in)	var_real,
		real (8), dimension(grid%nnode,0:1), intent(out)	var_ff
	)

Coordinate conversion from real space representation (points with the same R-Z coordinates have the same radial poloidal array index) to field following representation (two points on adjacent planes connected by a magnetic field line have the same radial-poloidal array index).

Parameters

[in]	grid	XGC grid data object, type(grid_type)
[in]	tr	Triangle indices for transformation, integer
[in]	p	Interpolation weights corresponding to the triangle indices, real(8)
[out]	var_ff	Output data in field-aligned representation, real(8)
[in]	var_real	Input data in real-space representation

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subroutine field_following_pos2::derivs	(	real (8), dimension(2), intent(in)	x,
		real (8), intent(in)	phi,
		real (8), dimension(2), intent(out)	dx
	)

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subroutine field_following_pos	(	real (kind=8), dimension(2), intent(in)	x_org,
		real (kind=8), intent(in)	phi,
		integer, intent(in)	dir,
		real (kind=8), intent(in)	w,
		real (kind=8), intent(in)	delta_phi,
		real (kind=8), dimension(2), intent(out)	x_dest
	)

Project the input (R,phi,Z) coordinates along the magnetic field to a different toroidal angle. High-level routine.

Parameters

[in]	x_org	Input (R,Z) coordinates, real(8)
[in]	phi	Input toroidal angle phi, real(8)
[in]	dir	Direction of the projection, (1) clockwise looking from above, (2) counter-clockwise, integer
[in]	w	???
[in]	delta_phi	Toroidal shift, final angle is phi+dir*delta_phi, real(8)
[out]	x_dest	Projected (R,Z) coordinates, real(8)

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subroutine field_following_pos2	(	real (kind=8), dimension(2), intent(in)	x_org,
		real (kind=8), intent(in)	phi_org,
		real (kind=8), intent(in)	phi_dest,
		real (kind=8), dimension(2), intent(out)	x_dest
	)

Project the input (R,phi,Z) coordinates along the magnetic field to a different toroidal angle. High-level routine.

Parameters

[in]	x_org	Input (R,Z) coordinates, real(8)
[in]	phi_org	Input toroidal angle phi, real(8)
[in]	phi_dest	Output toroidal angle phi, real(8)
[out]	x_dest	Projected (R,Z) coordinates, real(8)

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subroutine write_ff	(	type(grid_type)	grid,
		type(psn_type)	psn
	)

Initialize the field-aligned mapping between adjacent planes. The routine traces magnetic field lines from each vertex of a plane in both toroidal directions to the adjacent mid-planes and full-step planes, records the triangle in which the field line intersects these planes and the corresponding interpolation weights.

Parameters

[in]	grid	XGC grid object, type(grid_type)
[out]	psn	XGC field data object, type(psn_type)

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