timestep.c File Reference

#include <math.h>
#include <complex.h>
#include "common.h"
#include "gfft.h"
#include "debug.h"
#include "forcing.h"
#include "particles.h"
#include "ltide.h"

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Functions
void	timestep (struct Field dfldo, struct Field fldi, const double t, const double tremap, const double dt)
void	sgs_dissipation (struct Field fldi, const double t, const double dt)
void	implicitstep (struct Field fldi, const double t, const double dt)

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Function Documentation

void implicitstep	(	struct Field	fldi,
		const double	t,
		const double	dt
	)

Implicit steps of the integrator (essentially linear diffusion terms)

This is an implicit model: fldi is modified by this routine

Parameters:

fldi,:	(input and output) current status of the flow
t,:	current time of the simulation
dt,:	current timestep size

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void sgs_dissipation	(	struct Field	fldi,
		const double	t,
		const double	dt
	)

Subgridscale model This is the Chollet-Lesieur Model (1981) We have nu(k)=nu_i(k)*(E(kc)/kc)^(1/2) nu_i(k)=0.267+9.21*exp(-3.03 kc/k)

NB: this subgridscale model is applied only to the velocity field, even when MHD is active!

This is an implicit model: fldi is modified by this routine

Parameters:

fldi,:	(input and output) current status of the flow
t,:	current time of the simulation
dt,:	current timestep size

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void timestep	(	struct Field	dfldo,
		struct Field	fldi,
		const double	t,
		const double	tremap,
		const double	dt
	)

Compute the right hand side of the INCOMPRESSIBLE dynamical equation

Parameters:

dfldo,:	(output) right hand side of the dynamical equation
fldi,:	(input) current status of the flow
t,:	current time of the simulation
tremap,:	current remap time (only when shear is on)
dt,:	current timestep size

Braginskii viscosity. *********** /*

HALL EFFECT

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