Declaration of the field arrays associated to the Navier-Stokes equations.

Variables
type(t_face_field)	velocity
	Velocity at time \( t^{n+1} \).

type(t_face_field)	velocity_r

type(t_face_field)	velocity_t

type(t_face_field)	velocity_n
	Velocity at time \( t^{n} \).

type(t_face_field)	velocity_nm1
	Velocity at time \( t^{n-1} \).

type(t_face_field)	velocity_extrapolated
	Velocity at time \( t^{n+2} \).

double precision, dimension(:,:,:), allocatable	divergence
	Divergence of the velocity vector.

double precision, dimension(:,:,:), allocatable	divergence_extrapolated
	Divergence at time \( t^{n+2} \).

type(t_face_field)	velocity_predicted
	Predicted velocity (at the end of momentum momentum step)

double precision, dimension(:,:,:), allocatable	divergence_predicted
	Predicted divergence (at the end of momentum step)

double precision, dimension(:,:,:), allocatable	pressure
	Pressure.

double precision, dimension(:,:,:), allocatable	pressure_n

double precision, dimension(:,:,:), allocatable	pressure_nm1

double precision, dimension(:,:,:), allocatable	pressure_extrapolated

double precision, dimension(:,:,:), allocatable	pressure_increment
	Pressure increment \( p^{n+1} - p^{n} \).

double precision, dimension(:,:,:), allocatable	u_grad_p

double precision, dimension(:,:,:), allocatable	continuity_source_term
	Continuity source term.

double precision, dimension(:,:,:), allocatable	pressure_source_term
	Pressure source term.

type(t_face_field)	momentum_source_term
	Source term.

type(t_face_field)	momentum_linear_term_coef
	Linear term.

double precision, dimension(:,:,:), allocatable	permeability
	Permeability.

type(t_immersed_boundary_condition), dimension(:), allocatable	ibc_pressure
	Immersed boundary pressure field.

type(t_face_immersed_boundary_condition), dimension(:), allocatable	ibc_velocity
	Immersed boundary velocity field.

logical, dimension(:,:,:), allocatable	navier_is_penalized_cell
	Navier penalized cells.

type(t_face_field)	pressure_gradient
	Pressure gradient.

type(t_face_field)	surface_tension
	Surface tension.

type(t_face_field)	navier_explicit_terms_accumulator_n
	The current step explicit terms accumulator, if needed.

type(t_face_field)	navier_explicit_terms_accumulator_nm1
	The previous step explicit terms accumulator, if needed.

type(t_face_field)	navier_grid_volume_face
	Grid volume for the Navier-Stokes equation.

double precision, dimension(:,:,:), allocatable	navier_grid_volume_cell

Variables