pw_poisson_methods Module Reference

Data Types
interface	pw_poisson_rebuild
interface	pw_poisson_solve

Functions/Subroutines
subroutine, public	pw_poisson_set (poisson_env, cell_hmat, parameters, pw_pools, use_level, mt_super_ref_pw_grid, dct_pw_grid, force_rebuild)
	sets cell, grids and parameters used by the poisson solver You should call this at least once (and set everything) before using the poisson solver. Smart, doesn't set the thing twice to the same value Keeps track of the need to rebuild the poisson_env
subroutine, public	pw_func_u_convolution (poisson_env, func, convolution, u)
	computes the convolution f * u using reciprocal-space multiplication

Detailed Description

History

09.2005 created [fawzi]

Author

fawzi

Function/Subroutine Documentation

pw_poisson_set()

subroutine, public pw_poisson_methods::pw_poisson_set	(	type(pw_poisson_type), intent(inout)	poisson_env,
		real(kind=dp), dimension(3, 3), intent(in), optional	cell_hmat,
		type(pw_poisson_parameter_type), intent(in), optional	parameters,
		type(pw_pool_p_type), dimension(:), optional, pointer	pw_pools,
		integer, intent(in), optional	use_level,
		type(pw_grid_type), optional, pointer	mt_super_ref_pw_grid,
		type(pw_grid_type), optional, pointer	dct_pw_grid,
		logical, intent(in), optional	force_rebuild
	)

sets cell, grids and parameters used by the poisson solver You should call this at least once (and set everything) before using the poisson solver. Smart, doesn't set the thing twice to the same value Keeps track of the need to rebuild the poisson_env

Parameters

poisson_env	...
cell_hmat	...
parameters	...
pw_pools	...
use_level	...
mt_super_ref_pw_grid	...
dct_pw_grid	...
force_rebuild	...

Author

fawzi

Note

Checks everything at the end. This means that after each call to this method the poisson env must be fully ready, so the first time you have to set everything at once. Change this behaviour?

Definition at line 4003 of file pw_poisson_methods.F.

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pw_func_u_convolution()

subroutine, public pw_poisson_methods::pw_func_u_convolution	(	type(pw_poisson_type), pointer	poisson_env,
		type(pw_r3d_rs_type), intent(in)	func,
		type(pw_r3d_rs_type), intent(inout), optional	convolution,
		type(pw_r3d_rs_type), intent(in)	u
	)

computes the convolution f * u using reciprocal-space multiplication

Given two real-space functions f and u, this routine evaluates their convolution by transforming both to G space, multiplying their Fourier components, and transforming the product back to real space.

Parameters

poisson_env	poisson environment
func	input function f in real space
convolution	convolution result (f * u) in real space
u	input function/kernel u in real space

Author

Ziwei Chai

Date

12.03.2026

Definition at line 4096 of file pw_poisson_methods.F.