Viscosity.c File Reference

Calculation of the viscous force. More...

#include "fargo.h"

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Functions
real	FViscosity (real rad)
real	AspectRatio (real rad)
void	InitViscosity ()
void	UpdateDivVelocAndStressTensor (PolarGrid *Vrad, PolarGrid *Vtheta, PolarGrid *Rho)
	A function derived from the original ViscousTerms(). More...
void	UpdateVelocityWithViscousTerms (PolarGrid *Vrad, PolarGrid *Vtheta, PolarGrid *Rho, real DeltaT)
	A function derived from the original ViscousTerms(). More...
void	ImposeKeplerianEdges (PolarGrid *Vtheta)
	A function derived from the original ViscousTerms(). More...

Variables
static PolarGrid *	DRR
static PolarGrid *	DRP
static PolarGrid *	DPP

Detailed Description

Calculation of the viscous force.

The function FViscosity() returns the (kinematic) viscosity as a function of the radius (it handles all case: alpha or uniform viscosity, and inner cavity with a different viscosity). The update of the velocity is done in ViscousTerm(), which properly evaluate the stress tensor in 2D cylindrical coordinates. This file also contains the function AspectRatio(), which gives the aspect ratio as a function of the radius, in the case of a temperature jump in the disk (much in the manner as cavities arising from a viscosity jump are handled, hence the location of this function). Note that AspectRatio() does not feature the FLARINGINDEX, which is taken into account by the calling function.

Author

THORIN modifications by Ondřej Chrenko chren.nosp@m.ko@s.nosp@m.irrah.nosp@m..tro.nosp@m.ja.mf.nosp@m.f.cu.nosp@m.ni.cz, Copyright (C) 2017; original code by Frédéric Masset

Definition in file Viscosity.c.

Function Documentation

real AspectRatio

(

real

rad

)

Definition at line 50 of file Viscosity.c.

References ASPECTRATIO, LAMBDADOUBLING, PhysicalTime, PhysicalTimeInitial, TRANSITIONRADIUS, TRANSITIONRATIO, and TRANSITIONWIDTH.

Referenced by ImposeKeplerianEdges().

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real FViscosity

(

real

rad

)

Definition at line 26 of file Viscosity.c.

References ALPHAVISCOSITY, ASPECTRATIO, CAVITYRADIUS, CAVITYRATIO, CAVITYWIDTH, GlobalRmed, globcsvec, LAMBDADOUBLING, PhysicalTime, PhysicalTimeInitial, VISCOSITY, and ViscosityAlpha.

Referenced by UpdateDivVelocAndStressTensor().

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void ImposeKeplerianEdges

(

PolarGrid *

Vtheta

)

A function derived from the original ViscousTerms().

Definition at line 215 of file Viscosity.c.

References AspectRatio(), CPU_Number, CPU_Rank, FLARINGINDEX, G, polargrid::Nrad, OmegaFrame, Rmed, and SIGMASLOPE.

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void InitViscosity

(

)

Definition at line 67 of file Viscosity.c.

References CreatePolarGrid(), DivergenceVelocity, NRAD, NSEC, TAUPP, TAURP, and TAURR.

Referenced by InitEuler().

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void UpdateDivVelocAndStressTensor	(	PolarGrid *	Vrad,
		PolarGrid *	Vtheta,
		PolarGrid *	Rho
	)

A function derived from the original ViscousTerms().

Definition at line 79 of file Viscosity.c.

References DivergenceVelocity, polargrid::Field, FViscosity(), InvDiffRmed, InvDiffRsup, InvRinf, InvRmed, polargrid::Nrad, Rinf, Rmed, Rsup, TAUPP, TAURP, and TAURR.

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void UpdateVelocityWithViscousTerms	(	PolarGrid *	Vrad,
		PolarGrid *	Vtheta,
		PolarGrid *	Rho,
		real	DeltaT
	)

A function derived from the original ViscousTerms().

Definition at line 159 of file Viscosity.c.

References polargrid::Field, InvDiffRmed, InvDiffRsup, InvRinf, InvRmed, polargrid::Nrad, Rinf, Rmed, Rsup, TAUPP, TAURP, and TAURR.

Variable Documentation

PolarGrid * DPP

static

Definition at line 23 of file Viscosity.c.

PolarGrid * DRP

static

Definition at line 23 of file Viscosity.c.

PolarGrid* DRR

static

Definition at line 23 of file Viscosity.c.