StressAV Class Reference

Artificial stress for simulations including stress tensor. More...

#include <Stress.h>

Inheritance diagram for StressAV:

Classes
class	Derivative

Public Member Functions
	StressAV (const RunSettings &settings)
virtual void	setDerivatives (DerivativeHolder &derivatives, const RunSettings &settings) override
	Sets derivatives required by this term. More...
virtual void	initialize (IScheduler &scheduler, Storage &storage, const Float t) override
	Initialize all the derivatives and/or quantity values before derivatives are computed. More...
virtual void	finalize (IScheduler &scheduler, Storage &storage, const Float t) override
	Computes all the derivatives and/or quantity values based on accumulated derivatives. More...
virtual void	create (Storage &storage, IMaterial &material) const override
	Creates all quantities needed by the term using given material. More...
Public Member Functions inherited from Polymorphic
virtual	~Polymorphic ()

Detailed Description

Artificial stress for simulations including stress tensor.

This artificial force attemps to resolve problems with tensile instability in SPH. It isn't a replacement of 'standard' artificial viscosity, both terms serve different purposes and they complement each other. The implementation more or less follows paper 'SPH without a tensile instability' by Monaghan [Monaghan_1999].

Note

This object cannot be used within Balsara switch

Definition at line 21 of file Stress.h.

Constructor & Destructor Documentation

StressAV()

StressAV::StressAV

(

const RunSettings &

settings

)

Definition at line 60 of file Stress.cpp.

Member Function Documentation

create()

void StressAV::create ( Storage &  storage, IMaterial &  material  ) const

overridevirtual

Creates all quantities needed by the term using given material.

Called once for every body in the simulation.

Delta p / h is assumed to be constant, so that W(Delta p) is constant

Implements IEquationTerm.

Definition at line 120 of file Stress.cpp.

finalize()

void StressAV::finalize ( IScheduler &  scheduler, Storage &  storage, const Float  t  )

overridevirtual

Computes all the derivatives and/or quantity values based on accumulated derivatives.

Called every time step after derivatives are evaluated and saved to storage.

Implements IEquationTerm.

Definition at line 118 of file Stress.cpp.

initialize()

void StressAV::initialize ( IScheduler &  scheduler, Storage &  storage, const Float  t  )

overridevirtual

Initialize all the derivatives and/or quantity values before derivatives are computed.

Called at the beginning of every time step. Note that derivatives need not be zeroed out manually, this is already done by timestepping (for derivatives of quantities) and solver (for accumulated values).

Implements IEquationTerm.

Definition at line 96 of file Stress.cpp.

setDerivatives()

void StressAV::setDerivatives ( DerivativeHolder &  derivatives, const RunSettings &  settings  )

overridevirtual

Sets derivatives required by this term.

The derivatives are then automatically evaluated by the solver, the equation term can access the result in finalize function. This function is called once for each thread at the beginning of the run.

Todo:

partially duplicates stuff from EquationTerm.cpp

Implements IEquationTerm.

Definition at line 64 of file Stress.cpp.

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The documentation for this class was generated from the following files:

• /home/pavel/projects/astro/sph/src/core/sph/equations/av/Stress.h
• /home/pavel/projects/astro/sph/src/core/sph/equations/av/Stress.cpp