m_fftw Module Reference

The module contains the subroutines for the FFT routines. More...

Functions/Subroutines
impure subroutine, public	s_initialize_fftw_module
	The purpose of this subroutine is to create the fftw plan that will be used in the forward and backward DFTs when applying the Fourier filter in the azimuthal direction.
impure subroutine, public	s_apply_fourier_filter (q_cons_vf)
	The purpose of this subroutine is to apply a Fourier low- pass filter to the flow variables in the azimuthal direction to remove the high-frequency content. This alleviates the restrictive CFL condition arising from cells near the axis.
impure subroutine, public	s_finalize_fftw_module
	The purpose of this subroutine is to destroy the fftw plan that will be used in the forward and backward DFTs when applying the Fourier filter in the azimuthal direction.

Variables
type(c_ptr)	fwd_plan
type(c_ptr)	bwd_plan
type(c_ptr)	fftw_real_data
type(c_ptr)	fftw_cmplx_data
type(c_ptr)	fftw_fltr_cmplx_data
integer	real_size
integer	cmplx_size
integer	x_size
integer	batch_size
integer	nfq
real(c_double), dimension(:), pointer	data_real
	Real data.
complex(c_double_complex), dimension(:), pointer	data_cmplx
	Complex data in Fourier space.
complex(c_double_complex), dimension(:), pointer	data_fltr_cmplx
	Filtered complex data in Fourier space.
real(dp), dimension(:), allocatable, target	data_real_gpu
complex(dp), dimension(:), allocatable, target	data_cmplx_gpu
complex(dp), dimension(:), allocatable, target	data_fltr_cmplx_gpu
type(c_ptr)	fwd_plan_gpu
type(c_ptr)	bwd_plan_gpu
integer, dimension(:), allocatable	gpu_fft_size
integer, dimension(:), allocatable	iembed
integer, dimension(:), allocatable	oembed
integer	istride
integer	ostride
integer	idist
integer	odist
integer	rank

Detailed Description

The module contains the subroutines for the FFT routines.

Function/Subroutine Documentation

s_apply_fourier_filter()

impure subroutine, public m_fftw::s_apply_fourier_filter

(

type(scalar_field), dimension(sys_size), intent(inout)

q_cons_vf

)

The purpose of this subroutine is to apply a Fourier low- pass filter to the flow variables in the azimuthal direction to remove the high-frequency content. This alleviates the restrictive CFL condition arising from cells near the axis.

Parameters

q_cons_vf

Conservative variables

s_finalize_fftw_module()

impure subroutine, public m_fftw::s_finalize_fftw_module

The purpose of this subroutine is to destroy the fftw plan that will be used in the forward and backward DFTs when applying the Fourier filter in the azimuthal direction.

s_initialize_fftw_module()

impure subroutine, public m_fftw::s_initialize_fftw_module

The purpose of this subroutine is to create the fftw plan that will be used in the forward and backward DFTs when applying the Fourier filter in the azimuthal direction.

Variable Documentation

batch_size

integer m_fftw::batch_size

bwd_plan

type(c_ptr) m_fftw::bwd_plan

bwd_plan_gpu

type(c_ptr) m_fftw::bwd_plan_gpu

cmplx_size

integer m_fftw::cmplx_size

data_cmplx

complex(c_double_complex), dimension(:), pointer m_fftw::data_cmplx

Complex data in Fourier space.

data_cmplx_gpu

complex(dp), dimension(:), allocatable, target m_fftw::data_cmplx_gpu

data_fltr_cmplx

complex(c_double_complex), dimension(:), pointer m_fftw::data_fltr_cmplx

Filtered complex data in Fourier space.

data_fltr_cmplx_gpu

complex(dp), dimension(:), allocatable, target m_fftw::data_fltr_cmplx_gpu

data_real

real(c_double), dimension(:), pointer m_fftw::data_real

Real data.

data_real_gpu

real(dp), dimension(:), allocatable, target m_fftw::data_real_gpu

fftw_cmplx_data

type(c_ptr) m_fftw::fftw_cmplx_data

fftw_fltr_cmplx_data

type(c_ptr) m_fftw::fftw_fltr_cmplx_data

fftw_real_data

type(c_ptr) m_fftw::fftw_real_data

fwd_plan

type(c_ptr) m_fftw::fwd_plan

fwd_plan_gpu

type(c_ptr) m_fftw::fwd_plan_gpu

gpu_fft_size

integer, dimension(:), allocatable m_fftw::gpu_fft_size

idist

integer m_fftw::idist

iembed

integer, dimension(:), allocatable m_fftw::iembed

istride

integer m_fftw::istride

nfq

integer m_fftw::nfq

odist

integer m_fftw::odist

oembed

integer, dimension(:), allocatable m_fftw::oembed

ostride

integer m_fftw::ostride

rank

integer m_fftw::rank

real_size

integer m_fftw::real_size

x_size

integer m_fftw::x_size