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|
! Copyright (C) 2007 Imperial College London and others.
!
! Please see the AUTHORS file in the main source directory for a full list
! of copyright holders.
!
! Prof. C Pain
! Applied Modelling and Computation Group
! Department of Earth Science and Engineering
! Imperial College London
!
! amcgsoftware@imperial.ac.uk
!
! This library is free software; you can redistribute it and/or
! modify it under the terms of the GNU Lesser General Public
! License as published by the Free Software Foundation,
! version 2.1 of the License.
!
! This library is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! Lesser General Public License for more details.
!
! You should have received a copy of the GNU Lesser General Public
! License along with this library; if not, write to the Free Software
! Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
! USA
#include "confdefs.h"
#include "fdebug.h"
module hydrostatic_pressure
! these 5 need to be on top and in this order, so as not to confuse silly old intel compiler
use quadrature
use elements
use sparse_tools
use fields
use state_module
!
use fldebug
use transform_elements
use parallel_tools
use spud
use boundary_conditions
use vertical_extrapolation_module
use state_matrices_module
use upwind_stabilisation
use profiler
use shape_functions
use solvers
implicit none
public calculate_hydrostatic_pressure, &
& calculate_hydrostatic_pressure_gradient, &
& subtract_hydrostatic_pressure_gradient
character(len = *), parameter, public :: hp_name = "HydrostaticPressure"
character(len = *), parameter, public :: hpg_name = "HydrostaticPressureGradient"
! Stabilisation schemes
integer, parameter :: STABILISATION_NONE = 0, &
& STABILISATION_STREAMLINE_UPWIND = 1, STABILISATION_SUPG = 2
! Stabilisation scheme
integer :: stabilisation_scheme
integer :: nu_bar_scheme
real :: nu_bar_scale
interface subtract_given_hydrostatic_pressure_gradient_element
module procedure &
& subtract_given_hydrostatic_pressure_gradient_element_scalar, &
& subtract_given_hydrostatic_pressure_gradient_element_vector
end interface subtract_given_hydrostatic_pressure_gradient_element
contains
subroutine calculate_hydrostatic_pressure(state)
type(state_type), intent(inout) :: state
integer :: stat
type(scalar_field), pointer :: hp
hp => extract_scalar_field(state, hp_name, stat = stat)
if(stat /= 0) return
if(have_option(trim(hp%option_path)//&
& "/prognostic/spatial_discretisation/discontinuous_galerkin")) then
if(continuity(hp) > 0) then
FLExit("HydrostaticPressure with discontinuous_galerkin requires a discontinuous mesh")
end if
call calculate_hydrostatic_pressure_dg(state, hp)
else if(have_option(trim(hp%option_path)//&
& "/prognostic/spatial_discretisation/continuous_galerkin")) then
if(continuity(hp) < 0) then
FLExit("HydrostaticPressure with continuous_galerkin requires a continuous mesh")
end if
call calculate_hydrostatic_pressure_cg(state, hp)
else
FLAbort("Unknown spatial_discretisation option for HydrostaticPressure")
end if
ewrite_minmax(hp)
end subroutine calculate_hydrostatic_pressure
subroutine calculate_hydrostatic_pressure_gradient(state)
type(state_type), intent(inout) :: state
integer :: i, stat
type(vector_field), pointer :: hpg
hpg => extract_vector_field(state, hpg_name, stat = stat)
if(stat /= 0) return
select case(continuity(hpg))
case(0)
FLExit("HydrostaticPressureGradient requires a discontinuous mesh")
case(-1)
call calculate_hydrostatic_pressure_gradient_dg(state, hpg)
case default
ewrite(-1, *) "For mesh continuity: ", continuity(hpg)
FLAbort("Unrecognised mesh continuity")
end select
ewrite_minmax(hpg)
end subroutine calculate_hydrostatic_pressure_gradient
subroutine calculate_hydrostatic_pressure_dg(state, hp)
type(state_type), intent(in) :: state
type(scalar_field), intent(inout) :: hp
integer, dimension(:), pointer :: surface_element_list
real :: gravity_magnitude
type(mesh_type) :: from_hp_mesh
type(mesh_type), pointer :: surface_mesh
type(scalar_field) :: lbuoyancy, from_hp
type(scalar_field), pointer :: buoyancy, topdis
type(vector_field), pointer :: positions, gravity
ewrite(1, *) "In calculate_hydrostatic_pressure_dg"
if(.not. continuity(hp) == -1) then
FLExit("HydrostaticPressure using discontinuous_galerkin requires a discontinuous mesh")
end if
positions => extract_vector_field(state, "Coordinate")
call get_option("/physical_parameters/gravity/magnitude", gravity_magnitude)
buoyancy => extract_scalar_field(state, "VelocityBuoyancyDensity")
assert(ele_count(buoyancy) == ele_count(hp))
ewrite_minmax(buoyancy)
call allocate(lbuoyancy, buoyancy%mesh, "Buoyancy")
call set(lbuoyancy, buoyancy)
call scale(lbuoyancy, gravity_magnitude)
gravity => extract_vector_field(state, "GravityDirection")
assert(gravity%dim == mesh_dim(hp))
assert(ele_count(gravity) == ele_count(hp))
topdis => extract_scalar_field(state, "DistanceToTop")
call get_boundary_condition(topdis, 1, surface_mesh = surface_mesh, surface_element_list = surface_element_list)
from_hp_mesh = make_mesh(surface_mesh, shape = face_shape(hp, 1), continuity = -1)
call allocate(from_hp, from_hp_mesh, hp_name // "BoundaryCondition")
call deallocate(from_hp_mesh)
call zero(from_hp)
call vertical_integration(from_hp, hp, positions, gravity, surface_element_list, lbuoyancy)
call deallocate(from_hp)
call deallocate(lbuoyancy)
ewrite(1, *) "Exiting calculate_hydrostatic_pressure_dg"
end subroutine calculate_hydrostatic_pressure_dg
subroutine calculate_hydrostatic_pressure_gradient_dg(state, hpg)
type(state_type), intent(in) :: state
type(vector_field), intent(inout) :: hpg
integer :: i
integer, dimension(:), pointer :: surface_element_list
real :: gravity_magnitude
type(element_type) :: grad_buoyancy_shape
type(element_type), pointer :: buoyancy_shape
type(mesh_type) :: from_hpg_mesh, grad_buoyancy_mesh
type(mesh_type), pointer :: surface_mesh
type(scalar_field) :: from_hpg
type(scalar_field), dimension(hpg%dim) :: from_hpg_flattened, &
& hpg_flattened, grad_buoyancy_flattened
type(scalar_field), pointer :: buoyancy, topdis
type(vector_field) :: grad_buoyancy
type(vector_field), pointer :: positions, gravity
ewrite(1, *) "In calculate_hydrostatic_pressure_gradient_dg"
if(.not. continuity(hpg) == -1) then
FLExit("HydrostaticPressureGradient requires a discontinuous mesh")
end if
positions => extract_vector_field(state, "Coordinate")
call get_option("/physical_parameters/gravity/magnitude", gravity_magnitude)
buoyancy => extract_scalar_field(state, "VelocityBuoyancyDensity")
assert(ele_count(buoyancy) == ele_count(hpg))
ewrite_minmax(buoyancy)
gravity => extract_vector_field(state, "GravityDirection")
assert(gravity%dim == mesh_dim(hpg))
assert(ele_count(gravity) == ele_count(hpg))
if(continuity(buoyancy) /= 0) then
ewrite(-1, *) "VelocityBuoyancyDensity on mesh " // trim(buoyancy%mesh%name)
ewrite(-1, *) "With continuity: ", continuity(buoyancy)
ewrite(-1, *) "The buoyancy field needs to be continuous for HydrostaticPressureGradient."
ewrite(-1, *) "The buoyancy inherits its mesh from the Density field, if present, or from"
ewrite(-1, *) "the Velocity field when the Density is not found. Try setting a Density"
ewrite(-1, *) "field on a continuous mesh to overcome this error."
FLExit("HydrostaticPressureGradient requires a continuous VelocityBuoyancyDensity mesh")
end if
buoyancy_shape => ele_shape(buoyancy, 1)
! Make some assumptions in the projection of the buoyancy gradient
assert(ele_numbering_family(buoyancy_shape) == FAMILY_SIMPLEX)
assert(buoyancy_shape%numbering%type == ELEMENT_LAGRANGIAN)
assert(buoyancy_shape%degree > 0)
grad_buoyancy_shape = make_element_shape(buoyancy_shape, degree = buoyancy_shape%degree - 1)
grad_buoyancy_mesh = make_mesh(buoyancy%mesh, shape = grad_buoyancy_shape, continuity = -1)
call deallocate(grad_buoyancy_shape)
call allocate(grad_buoyancy, positions%dim, grad_buoyancy_mesh, name = "RHS")
call deallocate(grad_buoyancy_mesh)
do i = 1, ele_count(grad_buoyancy)
call calculate_grad_h_ele(i, positions, buoyancy, grad_buoyancy, gravity)
end do
call scale(grad_buoyancy, gravity_magnitude)
ewrite_minmax(grad_buoyancy)
topdis => extract_scalar_field(state, "DistanceToTop")
call get_boundary_condition(topdis, 1, surface_mesh = surface_mesh, surface_element_list = surface_element_list)
from_hpg_mesh = make_mesh(surface_mesh, shape = face_shape(hpg, 1), continuity = -1)
call allocate(from_hpg, from_hpg_mesh, hp_name // "BoundaryCondition")
call deallocate(from_hpg_mesh)
call zero(from_hpg)
do i = 1, hpg%dim
from_hpg_flattened(i) = from_hpg
hpg_flattened(i) = extract_scalar_field(hpg, i)
grad_buoyancy_flattened(i) = extract_scalar_field(grad_buoyancy, i)
end do
call vertical_integration(from_hpg_flattened, hpg_flattened, positions, gravity, surface_element_list, grad_buoyancy_flattened)
call deallocate(from_hpg)
call deallocate(grad_buoyancy)
ewrite(1, *) "Exiting calculate_hydrostatic_pressure_gradient_dg"
contains
subroutine calculate_grad_h_ele(ele, positions, source, grad_h, vertical_normal)
integer, intent(in) :: ele
type(vector_field), intent(in) :: positions
type(scalar_field), intent(in) :: source
type(vector_field), intent(inout) :: grad_h
type(vector_field), intent(in) :: vertical_normal
integer :: i
real, dimension(ele_ngi(positions, ele)) :: detwei
real, dimension(ele_loc(source, ele), ele_ngi(positions, ele), positions%dim) :: dshape
real, dimension(ele_loc(grad_h, ele), grad_h%dim) :: little_rhs
real, dimension(ele_loc(grad_h, ele), ele_loc(grad_h, ele)) :: little_mass
real, dimension(positions%dim, ele_ngi(positions, ele)) :: g_gi, grad_gi, grad_h_gi
type(element_type), pointer :: shape
call transform_to_physical(positions, ele, ele_shape(source, ele), &
& dshape = dshape, detwei = detwei)
shape => ele_shape(grad_h, ele)
little_mass = shape_shape(shape, shape, detwei)
grad_gi = ele_grad_at_quad(source, ele, dshape)
g_gi = ele_val_at_quad(vertical_normal, ele)
do i = 1, size(grad_h_gi, 2)
grad_h_gi(:, i) = grad_gi(:, i) - (dot_product(grad_gi(:, i), g_gi(:, i)) * g_gi(:, i))
end do
little_rhs = transpose(shape_vector_rhs(shape, grad_h_gi, detwei))
call solve(little_mass, little_rhs)
call set(grad_h, ele_nodes(grad_h, ele), transpose(little_rhs))
end subroutine calculate_grad_h_ele
end subroutine calculate_hydrostatic_pressure_gradient_dg
subroutine calculate_hydrostatic_pressure_cg(state, hp)
type(state_type), intent(inout) :: state
type(scalar_field), intent(inout) :: hp
type(csr_matrix), pointer :: matrix
type(scalar_field) :: rhs
logical :: assemble_matrix
ewrite(1,*) 'In calculate_hydrostatic_pressure_cg'
matrix => get_hydrostatic_pressure_cg_matrix(state, assemble_matrix=assemble_matrix)
call allocate(rhs, hp%mesh, "HydrostaticPressureCGRHS")
ewrite(2,*) 'assembling matrix: ', assemble_matrix
call profiler_tic(hp, "assembly")
call assemble_hydrostatic_pressure_cg(state, hp, matrix, rhs, assemble_matrix)
call profiler_toc(hp, "assembly")
call petsc_solve(hp, matrix, rhs)
call deallocate(rhs)
end subroutine calculate_hydrostatic_pressure_cg
subroutine assemble_hydrostatic_pressure_cg(state, hp, matrix, rhs, assemble_matrix)
type(state_type), intent(inout) :: state
type(scalar_field), intent(inout) :: hp
type(csr_matrix), intent(inout) :: matrix
type(scalar_field), intent(inout) :: rhs
logical, intent(in) :: assemble_matrix
real :: gravity_magnitude
type(scalar_field), pointer :: buoyancy, topdis
type(vector_field), pointer :: coordinate, gravity
type(scalar_field) :: lbuoyancy
integer :: i, ele, face
integer, dimension(:), pointer :: surface_element_list
ewrite(1,*) 'In assemble_hydrostatic_pressure_cg'
coordinate => extract_vector_field(state, "Coordinate")
assert(coordinate%dim == mesh_dim(hp))
assert(ele_count(coordinate) == ele_count(hp))
call get_option("/physical_parameters/gravity/magnitude", gravity_magnitude)
buoyancy => extract_scalar_field(state, "VelocityBuoyancyDensity")
assert(ele_count(buoyancy) == ele_count(hp))
ewrite_minmax(buoyancy)
call allocate(lbuoyancy, buoyancy%mesh, "HydrostaticPressureCGBuoyancy")
call set(lbuoyancy, buoyancy)
call scale(lbuoyancy, gravity_magnitude)
gravity => extract_vector_field(state, "GravityDirection")
assert(gravity%dim == mesh_dim(hp))
assert(ele_count(gravity) == ele_count(hp))
if(have_option(trim(hp%option_path) // "/prognostic/spatial_discretisation/continuous_galerkin/stabilisation/streamline_upwind")) then
ewrite(2, *) "Streamline upwind stabilisation"
stabilisation_scheme = STABILISATION_STREAMLINE_UPWIND
call get_upwind_options(trim(hp%option_path) // "/prognostic/spatial_discretisation/continuous_galerkin/stabilisation/streamline_upwind", &
& nu_bar_scheme, nu_bar_scale)
else if(have_option(trim(hp%option_path) // "/prognostic/spatial_discretisation/continuous_galerkin/stabilisation/streamline_upwind_petrov_galerkin")) then
ewrite(2, *) "SUPG stabilisation"
stabilisation_scheme = STABILISATION_SUPG
call get_upwind_options(trim(hp%option_path) // "/prognostic/spatial_discretisation/continuous_galerkin/stabilisation/streamline_upwind_petrov_galerkin", &
& nu_bar_scheme, nu_bar_scale)
else
ewrite(2, *) "No stabilisation"
stabilisation_scheme = STABILISATION_NONE
end if
if(assemble_matrix) call zero(matrix)
call zero(rhs)
do ele = 1, element_count(hp)
call assemble_hydrostatic_pressure_cg_element(matrix, rhs, &
hp, coordinate, lbuoyancy, gravity, &
ele, assemble_matrix)
end do
if(assemble_matrix) then
topdis => extract_scalar_field(state, "DistanceToTop")
call get_boundary_condition(topdis, 1, surface_element_list = surface_element_list)
do i = 1, size(surface_element_list)
face=surface_element_list(i)
call assemble_hydrostatic_pressure_cg_facet(matrix, &
hp, coordinate, gravity, &
face)
end do
end if
ewrite_minmax(rhs)
call deallocate(lbuoyancy)
end subroutine assemble_hydrostatic_pressure_cg
subroutine assemble_hydrostatic_pressure_cg_element(matrix, rhs, &
hp, coordinate, buoyancy, gravity, &
ele, assemble_matrix)
type(csr_matrix), intent(inout) :: matrix
type(scalar_field), intent(inout) :: rhs
type(scalar_field), intent(in) :: hp
type(vector_field), intent(in) :: coordinate
type(scalar_field), intent(in) :: buoyancy
type(vector_field), intent(in) :: gravity
integer, intent(in) :: ele
logical, intent(in) :: assemble_matrix
integer, dimension(:), pointer :: element_nodes
real, dimension(ele_ngi(hp, ele)) :: detwei
real, dimension(ele_loc(hp, ele), ele_ngi(hp, ele), mesh_dim(hp)) :: dhp_t
real, dimension(mesh_dim(hp), mesh_dim(hp), ele_ngi(hp, ele)) :: j_mat
type(element_type) :: test_function
type(element_type), pointer :: hp_shape
! What we will be adding to the matrix and RHS - assemble these as we
! go, so that we only do the calculations we really need
real, dimension(ele_loc(hp, ele)) :: rhs_addto
real, dimension(ele_loc(hp, ele), ele_loc(hp, ele)) :: matrix_addto
#ifdef DDEBUG
assert(ele_ngi(coordinate, ele) == ele_ngi(hp, ele))
assert(ele_ngi(gravity, ele) == ele_ngi(hp, ele))
assert(ele_ngi(buoyancy, ele) == ele_ngi(hp, ele))
#endif
matrix_addto = 0.0
rhs_addto = 0.0
hp_shape => ele_shape(hp, ele)
if(any(stabilisation_scheme == (/STABILISATION_STREAMLINE_UPWIND, STABILISATION_SUPG/))) then
call transform_to_physical(coordinate, ele, hp_shape, &
dshape=dhp_t, detwei=detwei, j=j_mat)
else
call transform_to_physical(coordinate, ele, hp_shape, &
dshape=dhp_t, detwei=detwei)
end if
select case(stabilisation_scheme)
case(STABILISATION_SUPG)
test_function = make_supg_shape(hp_shape, dhp_t, ele_val_at_quad(gravity, ele), j_mat, &
& nu_bar_scheme = nu_bar_scheme, nu_bar_scale = nu_bar_scale)
case default
test_function = hp_shape
call incref(test_function)
end select
! Important note: with SUPG the test function derivatives have not been
! modified - i.e. dhp_t is currently used everywhere. This is fine for P1,
! but is not consistent for P>1.
if(assemble_matrix) then
call add_matrix_element_cg(ele, test_function, hp, &
gravity, &
dhp_t, detwei, j_mat, &
matrix_addto)
end if
call add_buoyancy_element_cg(ele, test_function, hp, &
buoyancy, detwei, rhs_addto)
element_nodes => ele_nodes(hp, ele)
if(assemble_matrix) call addto(matrix, element_nodes, element_nodes, matrix_addto)
call addto(rhs, element_nodes, rhs_addto)
call deallocate(test_function)
end subroutine assemble_hydrostatic_pressure_cg_element
subroutine add_matrix_element_cg(ele, test_function, hp, &
gravity, &
dhp_t, detwei, j_mat, &
matrix_addto)
integer, intent(in) :: ele
type(element_type), intent(in) :: test_function
type(scalar_field), intent(in) :: hp
type(vector_field), intent(in) :: gravity
real, dimension(ele_loc(hp, ele), ele_ngi(hp, ele), mesh_dim(hp)), intent(in) :: dhp_t
real, dimension(ele_ngi(hp, ele)), intent(in) :: detwei
real, dimension(mesh_dim(hp), mesh_dim(hp), ele_ngi(hp, ele)), intent(in) :: j_mat
real, dimension(ele_loc(hp, ele), ele_loc(hp, ele)), intent(inout) :: matrix_addto
real, dimension(ele_loc(hp, ele), ele_loc(hp,ele)) :: advection_mat
real, dimension(gravity%dim, ele_ngi(gravity, ele)) :: gravity_at_quad
type(element_type), pointer :: hp_shape
hp_shape => ele_shape(hp, ele)
gravity_at_quad = ele_val_at_quad(gravity, ele)
! element advection matrix
! /
! | N_A (grav dot grad N_B) dV
! /
advection_mat = shape_vector_dot_dshape(test_function, gravity_at_quad, dhp_t, detwei)
! Stabilisation
select case(stabilisation_scheme)
case(STABILISATION_STREAMLINE_UPWIND)
advection_mat = advection_mat + &
& element_upwind_stabilisation(hp_shape, dhp_t, gravity_at_quad, j_mat, detwei, &
& nu_bar_scheme = nu_bar_scheme, nu_bar_scale = nu_bar_scale)
end select
matrix_addto = matrix_addto + advection_mat
end subroutine add_matrix_element_cg
subroutine add_buoyancy_element_cg(ele, test_function, &
hp, buoyancy, detwei, rhs_addto)
integer, intent(in) :: ele
type(element_type), intent(in) :: test_function
type(scalar_field), intent(in) :: hp
type(scalar_field), intent(in) :: buoyancy
real, dimension(ele_ngi(hp, ele)), intent(in) :: detwei
real, dimension(ele_loc(hp, ele)), intent(inout) :: rhs_addto
rhs_addto = rhs_addto + shape_rhs(test_function, detwei * ele_val_at_quad(buoyancy, ele))
end subroutine add_buoyancy_element_cg
subroutine assemble_hydrostatic_pressure_cg_facet(matrix, &
hp, coordinate, gravity, &
face)
type(csr_matrix), intent(inout) :: matrix
type(scalar_field), intent(in) :: hp
type(vector_field), intent(in) :: coordinate
type(vector_field), intent(in) :: gravity
integer, intent(in) :: face
! What we will be adding to the matrix - assemble these as we
! go, so that we only do the calculations we really need
real, dimension(face_loc(hp, face), face_loc(hp, face)) :: matrix_addto
integer, dimension(face_loc(hp, face)) :: face_nodes
real, dimension(face_ngi(hp, face)) :: detwei
real, dimension(mesh_dim(hp), face_ngi(hp, face)) :: normal
assert(face_ngi(coordinate, face) == face_ngi(hp, face))
assert(face_ngi(gravity, face) == face_ngi(hp, face))
matrix_addto = 0.0
call transform_facet_to_physical(coordinate, face, &
& detwei_f = detwei, normal = normal)
call add_matrix_face_cg(face, hp, gravity, detwei, normal, matrix_addto)
face_nodes = face_global_nodes(hp, face)
call addto(matrix, face_nodes, face_nodes, matrix_addto)
end subroutine assemble_hydrostatic_pressure_cg_facet
subroutine add_matrix_face_cg(face, hp, gravity, detwei, normal, matrix_addto)
integer, intent(in) :: face
type(scalar_field), intent(in) :: hp
type(vector_field), intent(in) :: gravity
real, dimension(face_ngi(hp, face)), intent(in) :: detwei
real, dimension(mesh_dim(hp), face_ngi(hp, face)), intent(in) :: normal
real, dimension(face_loc(hp, face), face_loc(hp, face)), intent(inout) :: matrix_addto
real, dimension(gravity%dim, face_ngi(gravity, face)) :: gravity_at_quad
real, dimension(face_loc(hp, face), face_loc(hp,face)) :: advection_mat
type(element_type), pointer :: hp_shape
hp_shape => face_shape(hp, face)
gravity_at_quad = face_val_at_quad(gravity, face)
advection_mat = shape_shape(hp_shape, hp_shape, detwei * sum(gravity_at_quad * normal, 1))
matrix_addto = matrix_addto - advection_mat
end subroutine add_matrix_face_cg
subroutine subtract_hydrostatic_pressure_gradient(mom_rhs, state)
!!< Subtract the HydrostaticPressure gradient from the momentum equation
!!< RHS
type(vector_field), intent(inout) :: mom_rhs
type(state_type), intent(inout) :: state
integer :: i, stat
type(scalar_field), pointer :: hp
type(vector_field), pointer :: positions, hpg
logical :: dg
ewrite(1, *) "In subtract_hydrostatic_pressure_gradient"
hp => extract_scalar_field(state, hp_name, stat)
if(stat == 0) then
assert(ele_count(hp) == ele_count(mom_rhs))
positions => extract_vector_field(state, "Coordinate")
assert(positions%dim == mom_rhs%dim)
assert(ele_count(positions) == ele_count(mom_rhs))
ewrite_minmax(mom_rhs)
if(have_option(trim(hp%option_path)// &
"/prognostic/spatial_discretisation/continuous_galerkin/do_not_integrate_gradient_by_parts")) then
ewrite(2,*) 'not integrating gradient by parts'
do i = 1, ele_count(mom_rhs)
if((continuity(mom_rhs)>=0).or.(element_owned(mom_rhs, i))) then
call subtract_given_hydrostatic_pressure_gradient_element(i, positions,hp, mom_rhs)
end if
end do
else
dg = (continuity(mom_rhs)==-1)
ewrite(2,*) 'integrating gradient by parts, dg = ', dg
do i = 1, ele_count(mom_rhs)
if((.not.dg).or.(element_owned(mom_rhs, i))) then
call subtract_given_hydrostatic_pressure_gradient_element_ibp(i, positions,hp, mom_rhs, dg)
end if
end do
end if
ewrite_minmax(mom_rhs)
end if
hpg => extract_vector_field(state, hpg_name, stat)
if(stat == 0) then
assert(ele_count(hpg) == ele_count(mom_rhs))
positions => extract_vector_field(state, "Coordinate")
assert(positions%dim == mom_rhs%dim)
assert(ele_count(positions) == ele_count(mom_rhs))
ewrite_minmax(mom_rhs)
do i = 1, ele_count(mom_rhs)
call subtract_given_hydrostatic_pressure_gradient_element(i, positions, hpg, mom_rhs)
end do
ewrite_minmax(mom_rhs)
end if
ewrite(1, *) "Exiting subtract_hydrostatic_pressure_gradient"
end subroutine subtract_hydrostatic_pressure_gradient
subroutine subtract_given_hydrostatic_pressure_gradient_element_scalar(ele, positions, hp, mom_rhs)
!!< Subtract the element-wise contribution of the HydrostaticPressure
!!< gradient from the momentum equation RHS
integer, intent(in) :: ele
type(vector_field), intent(in) :: positions
type(scalar_field), intent(in) :: hp
type(vector_field), intent(inout) :: mom_rhs
real, dimension(ele_ngi(positions, ele)) :: detwei
real, dimension(ele_loc(hp, ele), ele_ngi(positions, ele), positions%dim) :: dn_t
assert(ele_ngi(positions, ele) == ele_ngi(mom_rhs, ele))
assert(ele_ngi(hp, ele) == ele_ngi(mom_rhs, ele))
call transform_to_physical(positions, ele, ele_shape(hp, ele), &
& dshape = dn_t, detwei = detwei)
! /
! | -N_A grad gp dV
! /
call addto(mom_rhs, ele_nodes(mom_rhs, ele), -shape_vector_rhs(ele_shape(mom_rhs, ele), ele_grad_at_quad(hp, ele, dn_t), detwei))
end subroutine subtract_given_hydrostatic_pressure_gradient_element_scalar
subroutine subtract_given_hydrostatic_pressure_gradient_element_vector(ele, positions, hpg, mom_rhs)
!!< Subtract the element-wise contribution of the HydrostaticPressureGradient
!!< from the momentum equation RHS
integer, intent(in) :: ele
type(vector_field), intent(in) :: positions
type(vector_field), intent(in) :: hpg
type(vector_field), intent(inout) :: mom_rhs
real, dimension(ele_ngi(positions, ele)) :: detwei
assert(ele_ngi(positions, ele) == ele_ngi(mom_rhs, ele))
assert(ele_ngi(hpg, ele) == ele_ngi(mom_rhs, ele))
call transform_to_physical(positions, ele, &
& detwei = detwei)
! /
! | -N_A grad gp dV
! /
call addto(mom_rhs, ele_nodes(mom_rhs, ele), -shape_vector_rhs(ele_shape(mom_rhs, ele), ele_val_at_quad(hpg, ele), detwei))
end subroutine subtract_given_hydrostatic_pressure_gradient_element_vector
subroutine subtract_given_hydrostatic_pressure_gradient_element_ibp(ele, positions, hp, mom_rhs, dg)
!!< Subtract the element-wise contribution of the HydrostaticPressure
!!< gradient from the momentum equation RHS
integer, intent(in) :: ele
type(vector_field), intent(in) :: positions
type(scalar_field), intent(in) :: hp
type(vector_field), intent(inout) :: mom_rhs
logical, intent(in) :: dg
real, dimension(ele_ngi(positions, ele)) :: detwei
real, dimension(ele_loc(mom_rhs, ele), ele_ngi(mom_rhs, ele), mom_rhs%dim) :: dn_s
integer, dimension(:), pointer :: neigh
integer :: ele_2, face, face_2, ni
logical :: p0
assert(ele_ngi(positions, ele) == ele_ngi(mom_rhs, ele))
assert(ele_ngi(hp, ele) == ele_ngi(mom_rhs, ele))
p0 =(element_degree(mom_rhs,ele)==0)
if(.not.p0) then
call transform_to_physical(positions, ele, ele_shape(mom_rhs, ele), &
& dshape = dn_s, detwei = detwei)
! /
! | -N_A grad gp dV
! /
call addto(mom_rhs, ele_nodes(mom_rhs, ele), dshape_rhs(dn_s, detwei*ele_val_at_quad(hp, ele)))
end if
neigh=>ele_neigh(hp, ele)
neighbourloop: do ni = 1, size(neigh)
ele_2 = neigh(ni)
if((ele_2<0).or.dg) then
! get in here if it's an external face with a cg test space
! or always for a dg test space
face = ele_face(hp, ele, ele_2)
if(ele_2>0) then
! internal face... should only be here with dg
face_2=ele_face(hp, ele_2, ele)
else
! the boundary case... get here with dg and cg
face_2=face
end if
call subtract_given_hydrostatic_pressure_gradient_face_ibp(face, face_2, positions, hp, mom_rhs, dg)
end if
end do neighbourloop
end subroutine subtract_given_hydrostatic_pressure_gradient_element_ibp
subroutine subtract_given_hydrostatic_pressure_gradient_face_ibp(face, face_2, positions, hp, mom_rhs, dg)
integer, intent(in) :: face, face_2
type(vector_field), intent(in) :: positions
type(scalar_field), intent(in) :: hp
type(vector_field), intent(inout) :: mom_rhs
logical, intent(in) :: dg
real, dimension(face_ngi(hp, face)) :: detwei
real, dimension(mesh_dim(hp), face_ngi(hp, face)) :: normal
real, dimension(face_ngi(hp, face)) :: hp_at_quad
if(face==face_2) then
! boundary case - should be the only case we end up here with cg
! but we'll end up here with dg too
hp_at_quad = face_val_at_quad(hp, face)
else if(dg) then
! if we're here then we have a dg test space and this is an internal face
hp_at_quad = 0.5*face_val_at_quad(hp, face)+0.5*face_val_at_quad(hp, face_2)
else
! should never get here... if we are then we're on an internal face with a cg
! test space. Put in a bug trap until this is tested with a cg test space.
FLAbort("Huh? Ended up at an internal face with a cg test space.")
end if
call transform_facet_to_physical(positions, face, &
detwei_f = detwei, normal = normal)
call addto(mom_rhs, face_global_nodes(mom_rhs, face), &
-shape_vector_rhs(face_shape(mom_rhs, face), normal, &
hp_at_quad*detwei))
end subroutine subtract_given_hydrostatic_pressure_gradient_face_ibp
end module hydrostatic_pressure
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