Kernel functions (Gaussian, delta) that smear Lagrangian bubble effects onto the Eulerian grid. More...

Functions/Subroutines
subroutine	s_smoothfunction (nbubs, lbk_rad, lbk_vel, lbk_s, lbk_pos, updatedvar, kcomp)
	Smear the Lagrangian bubble effects onto the Eulerian grid using the selected kernel.
subroutine	s_build_cell_list (nbubs, lbk_s)
	Builds a sorted cell list mapping each interior cell (0:m,0:n,0:p) to its resident bubbles. Uses a counting-sort on the host (O(nBubs + N_cells)). Must be called before s_gaussian each RK stage.
subroutine	s_deltafunc (nbubs, lbk_rad, lbk_vel, lbk_s, updatedvar, kcomp)
	Cell-centric delta-function smearing using the cell list (no GPU atomics). Each bubble only affects the cell it resides in. The outer GPU loop iterates over interior cells and sums contributions from resident bubbles.
subroutine	s_gaussian (nbubs, lbk_rad, lbk_vel, lbk_s, lbk_pos, updatedvar, kcomp)
	Cell-centric gaussian smearing using the cell list (no GPU atomics). Each grid cell accumulates contributions from nearby bubbles looked up via cell_list_start/count/idx.
subroutine	s_applygaussian (center, cellaux, nodecoord, stddsv, strength_idx, func)
	Evaluate the Gaussian kernel at a grid node for a given bubble center.
subroutine	s_check_celloutside (cellaux, celloutside)
	Check if the current cell is outside the computational domain including ghost cells.
subroutine	s_shift_cell_symmetric_bc (cellaux, cell)
	Relocate cells that intersect a symmetric boundary.
subroutine	s_compute_stddsv (cell, volpart, stddsv)
	Calculates the standard deviation of the bubble being smeared in the Eulerian framework.
subroutine	s_get_char_vol (cellx, celly, cellz, charvol)
	Compute the characteristic cell volume.
subroutine	s_get_cell (s_cell, get_cell)
	Convert bubble computational coordinates from real to integer cell indices.
subroutine	s_compute_pressure_gradients (q_prim_vf)
	Precompute cell-centered pressure gradients (dp/dx, dp/dy, dp/dz).
real(wp) function	f_interpolate_velocity (pos, cell, i, q_prim_vf)
real(wp) function	f_get_bubble_force (pos, rad, rdot, vel, mg, mv, re, rho, cell, i, q_prim_vf)

Variables
real(wp), dimension(:,:,:), allocatable	grad_p_x
real(wp), dimension(:,:,:), allocatable	grad_p_y
real(wp), dimension(:,:,:), allocatable	grad_p_z
real(wp), dimension(:,:), allocatable	fd_coeff_x_pgrad
real(wp), dimension(:,:), allocatable	fd_coeff_y_pgrad
real(wp), dimension(:,:), allocatable	fd_coeff_z_pgrad
integer, dimension(:,:,:), allocatable	cell_list_start
integer, dimension(:,:,:), allocatable	cell_list_count
integer, dimension(:), allocatable	cell_list_idx

Detailed Description

Kernel functions (Gaussian, delta) that smear Lagrangian bubble effects onto the Eulerian grid.

Function/Subroutine Documentation

◆ f_get_bubble_force()

real(wp) function m_bubbles_el_kernels::f_get_bubble_force	(	real(wp), intent(in)	pos,
		real(wp), intent(in)	rad,
		real(wp), intent(in)	rdot,
		real(wp), intent(in)	vel,
		real(wp), intent(in)	mg,
		real(wp), intent(in)	mv,
		real(wp), intent(in)	re,
		real(wp), intent(in)	rho,
		integer, dimension(3), intent(in)	cell,
		integer, intent(in)	i,
		type(scalar_field), dimension(sys_size), intent(in)	q_prim_vf )

Definition at line 1542 of file m_bubbles_EL_kernels.fpp.f90.

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◆ f_interpolate_velocity()

real(wp) function m_bubbles_el_kernels::f_interpolate_velocity	(	real(wp), intent(in)	pos,
		integer, dimension(3), intent(in)	cell,
		integer, intent(in)	i,
		type(scalar_field), dimension(sys_size), intent(in)	q_prim_vf )

Definition at line 1410 of file m_bubbles_EL_kernels.fpp.f90.

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◆ s_applygaussian()

subroutine m_bubbles_el_kernels::s_applygaussian	(	real(wp), dimension(3), intent(in)	center,
		integer, dimension(3), intent(in)	cellaux,
		real(wp), dimension(3), intent(in)	nodecoord,
		real(wp), intent(in)	stddsv,
		real(wp), intent(in)	strength_idx,
		real(wp), intent(out)	func )

Evaluate the Gaussian kernel at a grid node for a given bubble center.

3D gaussian function

2D cylindrical function:

2D cartesian function: Equation (48) from Maeda and Colonius 2018

Definition at line 813 of file m_bubbles_EL_kernels.fpp.f90.

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◆ s_build_cell_list()

subroutine m_bubbles_el_kernels::s_build_cell_list	(	integer, intent(in)	nbubs,
		real(wp), dimension(1:lag_params%nbubs_glb,1:3,1:2), intent(in)	lbk_s )

Builds a sorted cell list mapping each interior cell (0:m,0:n,0:p) to its resident bubbles. Uses a counting-sort on the host (O(nBubs + N_cells)). Must be called before s_gaussian each RK stage.

Definition at line 433 of file m_bubbles_EL_kernels.fpp.f90.

◆ s_check_celloutside()

subroutine m_bubbles_el_kernels::s_check_celloutside	(	integer, dimension(3), intent(inout)	cellaux,
		logical, intent(out)	celloutside )

Check if the current cell is outside the computational domain including ghost cells.

Definition at line 908 of file m_bubbles_EL_kernels.fpp.f90.

◆ s_compute_pressure_gradients()

subroutine m_bubbles_el_kernels::s_compute_pressure_gradients ( type(scalar_field), dimension(sys_size), intent(in) q_prim_vf )

Precompute cell-centered pressure gradients (dp/dx, dp/dy, dp/dz).

Definition at line 1223 of file m_bubbles_EL_kernels.fpp.f90.

◆ s_compute_stddsv()

subroutine m_bubbles_el_kernels::s_compute_stddsv	(	integer, dimension(3), intent(in)	cell,
		real(wp), intent(in)	volpart,
		real(wp), intent(out)	stddsv )

Calculates the standard deviation of the bubble being smeared in the Eulerian framework.

Compute characteristic distance

Compute characteristic volume

Compute Standard deviaton

Definition at line 1046 of file m_bubbles_EL_kernels.fpp.f90.

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◆ s_deltafunc()

subroutine m_bubbles_el_kernels::s_deltafunc	(	integer, intent(in)	nbubs,
		real(wp), dimension(1:lag_params%nbubs_glb,1:2), intent(in)	lbk_rad,
		real(wp), dimension(1:lag_params%nbubs_glb,1:2), intent(in)	lbk_vel,
		real(wp), dimension(1:lag_params%nbubs_glb,1:3,1:2), intent(in)	lbk_s,
		type(scalar_field), dimension(:), intent(inout)	updatedvar,
		type(scalar_field), dimension(:), intent(inout)	kcomp )

Cell-centric delta-function smearing using the cell list (no GPU atomics). Each bubble only affects the cell it resides in. The outer GPU loop iterates over interior cells and sums contributions from resident bubbles.

Definition at line 512 of file m_bubbles_EL_kernels.fpp.f90.

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◆ s_gaussian()

subroutine m_bubbles_el_kernels::s_gaussian	(	integer, intent(in)	nbubs,
		real(wp), dimension(1:lag_params%nbubs_glb,1:2), intent(in)	lbk_rad,
		real(wp), dimension(1:lag_params%nbubs_glb,1:2), intent(in)	lbk_vel,
		real(wp), dimension(1:lag_params%nbubs_glb,1:3,1:2), intent(in)	lbk_s,
		real(wp), dimension(1:lag_params%nbubs_glb,1:3,1:2), intent(in)	lbk_pos,
		type(scalar_field), dimension(:), intent(inout)	updatedvar,
		type(scalar_field), dimension(:), intent(inout)	kcomp )

Cell-centric gaussian smearing using the cell list (no GPU atomics). Each grid cell accumulates contributions from nearby bubbles looked up via cell_list_start/count/idx.

Definition at line 626 of file m_bubbles_EL_kernels.fpp.f90.

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◆ s_get_cell()

subroutine m_bubbles_el_kernels::s_get_cell	(	real(wp), dimension(3), intent(in)	s_cell,
		integer, dimension(3), intent(out)	get_cell )

Convert bubble computational coordinates from real to integer cell indices.

Definition at line 1172 of file m_bubbles_EL_kernels.fpp.f90.

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◆ s_get_char_vol()

subroutine m_bubbles_el_kernels::s_get_char_vol	(	integer, intent(in)	cellx,
		integer, intent(in)	celly,
		integer, intent(in)	cellz,
		real(wp), intent(out)	charvol )

Compute the characteristic cell volume.

Definition at line 1117 of file m_bubbles_EL_kernels.fpp.f90.

◆ s_shift_cell_symmetric_bc()

subroutine m_bubbles_el_kernels::s_shift_cell_symmetric_bc	(	integer, dimension(3), intent(inout)	cellaux,
		integer, dimension(3), intent(in)	cell )

Relocate cells that intersect a symmetric boundary.

Definition at line 975 of file m_bubbles_EL_kernels.fpp.f90.

◆ s_smoothfunction()

subroutine m_bubbles_el_kernels::s_smoothfunction	(	integer, intent(in)	nbubs,
		real(wp), dimension(1:lag_params%nbubs_glb,1:2), intent(in)	lbk_rad,
		real(wp), dimension(1:lag_params%nbubs_glb,1:2), intent(in)	lbk_vel,
		real(wp), dimension(1:lag_params%nbubs_glb,1:3,1:2), intent(in)	lbk_s,
		real(wp), dimension(1:lag_params%nbubs_glb,1:3,1:2), intent(in)	lbk_pos,
		type(scalar_field), dimension(:), intent(inout)	updatedvar,
		type(scalar_field), dimension(:), intent(inout)	kcomp )