mod_viscosity Module Reference

The module add viscous source terms and check time step. More...

Functions/Subroutines
subroutine	vc_params_read (files)
	Read this module"s parameters from a file. More...
subroutine	viscosity_init (phys_wider_stencil, phys_req_diagonal)
	Initialize the module. More...
subroutine	viscosity_add_source (qdt, ixIL, ixOL, wCT, w, x, energy, qsourcesplit, active)
subroutine	viscosity_get_dt (w, ixIL, ixOL, dtnew, dxD, x)
subroutine, public	visc_get_flux_prim (w, x, ixIL, ixOL, idim, f, energy)
subroutine	get_crossgrad (ixIL, ixOL, x, w, idim, cross)
subroutine	cart_cross_grad (ixIL, ixOL, x, w, idim, cross)
	yields d_i v_j + d_j v_i for a given i, OK in Cartesian and for some tensor terms in cylindrical (rr & rz) and in spherical (rr) More...
subroutine	visc_add_source_geom (qdt, ixIL, ixOL, wCT, w, x)

Variables
double precision, public	vc_mu = 1.d0
	Viscosity coefficient. More...
logical	vc_4th_order = .false.
	fourth order More...
logical	vc_split = .false.
	source split or not More...
logical	viscindiv = .false.
	whether to compute the viscous terms as fluxes (ie in the div on the LHS), or not (by default) More...

Detailed Description

The module add viscous source terms and check time step.

Viscous forces in the momentum equations: d m_i/dt += - div (vc_mu * PI) !! Viscous work in the energy equation: !! de/dt += - div (v . vc_mu * PI) where the PI stress tensor is PI_i,j = - (dv_j/dx_i + dv_i/dx_j) + (2/3)*Sum_k dv_k/dx_k where vc_mu is the dynamic viscosity coefficient (g cm^-1 s^-1).

Function/Subroutine Documentation

cart_cross_grad()

subroutine mod_viscosity::cart_cross_grad	(	integer, intent(in)	ixI,
		integer, intent(in)	L,
		integer, intent(in)	ixO,
			L,
		double precision, dimension(ixi^s, 1:^nd), intent(in)	x,
		double precision, dimension(ixi^s, 1:nw), intent(in)	w,
		integer, intent(in)	idim,
		double precision, dimension(ixi^s,ndir), intent(out)	cross
	)

yields d_i v_j + d_j v_i for a given i, OK in Cartesian and for some tensor terms in cylindrical (rr & rz) and in spherical (rr)

Definition at line 460 of file mod_viscosity.t.

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get_crossgrad()

subroutine mod_viscosity::get_crossgrad	(	integer, intent(in)	ixI,
		integer, intent(in)	L,
		integer, intent(in)	ixO,
			L,
		double precision, dimension(ixi^s, 1:ndim), intent(in)	x,
		double precision, dimension(ixi^s, 1:nw), intent(in)	w,
		integer, intent(in)	idim,
		double precision, dimension(ixi^s,ndir), intent(out)	cross
	)

Definition at line 308 of file mod_viscosity.t.

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vc_params_read()

subroutine mod_viscosity::vc_params_read

(

character(len=*), dimension(:), intent(in)

files

)

Read this module"s parameters from a file.

Definition at line 40 of file mod_viscosity.t.

visc_add_source_geom()

subroutine mod_viscosity::visc_add_source_geom	(	double precision, intent(in)	qdt,
		integer, intent(in)	ixI,
		integer, intent(in)	L,
		integer, intent(in)	ixO,
			L,
		double precision, dimension(ixi^s, 1:nw), intent(inout)	wCT,
		double precision, dimension(ixi^s, 1:nw), intent(inout)	w,
		double precision, dimension(ixi^s, 1:ndim), intent(in)	x
	)

Definition at line 482 of file mod_viscosity.t.

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visc_get_flux_prim()

subroutine, public mod_viscosity::visc_get_flux_prim	(	double precision, dimension(ixi^s, 1:nw), intent(in)	w,
		double precision, dimension(ixi^s, 1:^nd), intent(in)	x,
		integer, intent(in)	ixI,
		integer, intent(in)	L,
		integer, intent(in)	ixO,
			L,
		integer, intent(in)	idim,
		double precision, dimension(ixi^s, nwflux), intent(inout)	f,
		logical, intent(in)	energy
	)

Definition at line 274 of file mod_viscosity.t.

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viscosity_add_source()

subroutine mod_viscosity::viscosity_add_source	(	double precision, intent(in)	qdt,
		integer, intent(in)	ixI,
		integer, intent(in)	L,
		integer, intent(in)	ixO,
			L,
		double precision, dimension(ixi^s,1:nw), intent(in)	wCT,
		double precision, dimension(ixi^s,1:nw), intent(inout)	w,
		double precision, dimension(ixi^s,1:ndim), intent(in)	x,
		logical, intent(in)	energy,
		logical, intent(in)	qsourcesplit,
		logical, intent(inout)	active
	)

Definition at line 84 of file mod_viscosity.t.

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viscosity_get_dt()

subroutine mod_viscosity::viscosity_get_dt	(	double precision, dimension(ixi^s,1:nw), intent(in)	w,
		integer, intent(in)	ixI,
		integer, intent(in)	L,
		integer, intent(in)	ixO,
			L,
		double precision, intent(inout)	dtnew,
		double precision, intent(in)	dx,
		double precision, intent(in)	D,
		double precision, dimension(ixi^s,1:ndim), intent(in)	x
	)

Definition at line 242 of file mod_viscosity.t.

viscosity_init()

subroutine mod_viscosity::viscosity_init	(	integer, intent(inout)	phys_wider_stencil,
		logical, intent(inout)	phys_req_diagonal
	)

Initialize the module.

Definition at line 56 of file mod_viscosity.t.

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Variable Documentation

vc_4th_order

logical mod_viscosity::vc_4th_order = .false.

fourth order

Definition at line 17 of file mod_viscosity.t.

vc_mu

double precision, public mod_viscosity::vc_mu = 1.d0

Viscosity coefficient.

Definition at line 14 of file mod_viscosity.t.

vc_split

logical mod_viscosity::vc_split = .false.

source split or not

Definition at line 20 of file mod_viscosity.t.

viscindiv

logical mod_viscosity::viscindiv = .false.

whether to compute the viscous terms as fluxes (ie in the div on the LHS), or not (by default)

Definition at line 24 of file mod_viscosity.t.