In case one wants to have a frictionless interaction between the interactables (particles or walls), the following class can be used. See Interaction.h, where one can set the FrictionalForceInteraction to EmptyFrictionInteraction. More...

#include <EmptyFrictionInteraction.h>

Inheritance diagram for EmptyFrictionInteraction:

Public Types
typedef EmptyFrictionSpecies	SpeciesType
	An alias name for EmptyFrictionSpecies. More...

Public Member Functions
	EmptyFrictionInteraction (BaseInteractable P, BaseInteractable I, Mdouble timeStamp)
	Constructor. More...

	EmptyFrictionInteraction (const EmptyFrictionInteraction &p)
	Copy constructor. More...

virtual	~EmptyFrictionInteraction ()
	Destructor. More...

void	computeFrictionForce ()
	Computes nothing, it is an empty function. More...

void	read (std::istream &is)
	Interaction read function, which accepts an std::istream as input. More...

void	write (std::ostream &os) const
	Interaction write function, which accepts an std::ostream as input. More...

Mdouble	getElasticEnergy () const
	Returns zero as it is an frictionless interaction. More...

const EmptyFrictionSpecies *	getSpecies () const
	Returns a const pointer of type EmptyFrictionSpecies*. More...

std::string	getBaseName () const
	Returns interaction name/type. More...

void	integrate (Mdouble timeStep)
	Does nothing as there is no force. More...

Mdouble	getTangentialOverlap () const
	Returns zero overlap. More...

const Vec3D	getTangentialForce () const
	Returns zero tangential force. More...

Public Member Functions inherited from BaseInteraction
	BaseInteraction (BaseInteractable P, BaseInteractable I, Mdouble timeStamp)
	A constructor takes the BaseInteractable objects which are interacting (come into contact) and time the interaction starts. More...

	BaseInteraction (const BaseInteraction &p)
	Copy constructor. More...

	BaseInteraction ()
	Empty constructor. More...

virtual	~BaseInteraction ()
	The default destructor. More...

virtual void	actionsOnErase ()
	If an interaction needs to do something before it gets erased, add it here. E.g. Liquid bridges rupture at the end of their lifetime, and the liquid bridge volume has to be redistributed. The reason this action is not done in the destructor is that this action should not be taken when erasing ghost interactions. More...

virtual void	computeForce ()
	Virtual function that contains the force law between the two objects interacting. More...

void	writeToFStat (std::ostream &os) const
	Writes forces data to the FStat file. More...

virtual std::string	getName () const
	Virtual function which allows interactions to be named. More...

void	setDistance (Mdouble distance)
	Sets the interaction distance between the two interacting objects. More...

void	setNormal (Vec3D normal)
	Sets the normal vector between the two interacting objects. More...

void	setOverlap (Mdouble overlap)
	Set the overlap between the two interacting object. More...

void	setContactPoint (Vec3D contactPoint)
	Set the location of the contact point between the two interacting objects. More...

void	setTimeStamp (Mdouble timeStamp)
	Updates the time step of the interacting. Note, timesteps used to find completed interactions. More...

void	setSpecies (BaseSpecies *species)
	Set the Species of the interaction; note this can either be a Species or MixedSpecies. More...

void	setP (BaseInteractable *P)
	Sets the first object involved in the interaction (normally a particle). More...

void	setI (BaseInteractable *I)
	Sets the second object involved in the interaction (often particle or wall). More...

void	setHandler (InteractionHandler *handler)
	Sets the pointer to the interaction hander which is storing this interaction. More...

InteractionHandler *	getHandler () const
	Gets a point to the interaction handlers to which this interaction belongs. More...

const Vec3D &	getForce () const
	Gets the current force (vector) between the two interacting objects. More...

const Vec3D &	getTorque () const
	Gets the current torque (vector) between the two interacting objects. More...

const Vec3D &	getNormal () const
	Gets the normal vector between the two interacting objects. More...

const Vec3D &	getContactPoint () const
	Gets constant reference to contact point (vector). More...

Mdouble	getOverlap () const
	Returns a Mdouble with the current overlap between the two interacting objects. More...

Mdouble	getContactRadius () const
	Returns a Mdouble with the current contact between the two interacting objects. More...

void	removeFromHandler ()
	Removes this interaction from its interaction hander. More...

void	copySwitchPointer (const BaseInteractable original, BaseInteractable ghost) const
	This copies the interactions of the original particle and replaces the original with the ghost copy. More...

void	gatherContactStatistics ()

BaseInteractable *	getP ()
	Returns a pointer to first object involved in the interaction (normally a particle). More...

BaseInteractable *	getI ()

const BaseInteractable *	getP () const

const BaseInteractable *	getI () const
	Returns a constant pointer to the second object involved in the interaction. More...

Mdouble	getTimeStamp () const
	Returns an Mdouble which is the time stamp of the interaction. More...

Mdouble	getDistance () const
	Returns an Mdouble which is the norm (length) of distance vector. More...

const Vec3D &	getRelativeVelocity () const
	Returns a constant reference to a vector of relative velocity. More...

Mdouble	getNormalRelativeVelocity () const
	Returns a double which is the norm (length) of the relative velocity vector. More...

Mdouble	getAbsoluteNormalForce () const
	Returns the absolute value of the norm (length) of the Normal force vector. More...

virtual BaseInteraction *	copy () const =0
	Makes a copy of the interaction and returns a pointer to the copy. More...

unsigned int	getMultiContactIdentifier () const

void	setMultiContactIdentifier (unsigned int multiContactIdentifier_)

virtual void	rotateHistory (Matrix3D &rotationMatrix)
	When periodic particles are used, some interactions need certain history properties rotated (e.g. tangential springs). This is the function for that. More...

virtual void	actionsAfterTimeStep ()

virtual unsigned	getNumberOfFieldsVTK () const

virtual std::string	getTypeVTK (unsigned i) const

virtual std::string	getNameVTK (unsigned i) const

virtual std::vector< Mdouble >	getFieldVTK (unsigned i) const

void	setForce (Vec3D force)
	set total force (this is used by the normal force, tangential forces are added use addForce) More...

Public Member Functions inherited from BaseObject
	BaseObject ()
	Default constructor. More...

	BaseObject (const BaseObject &p)
	Copy constructor, copies all the objects BaseObject contains. More...

virtual	~BaseObject ()
	virtual destructor More...

virtual void	moveInHandler (const unsigned int index)
	Except that it is virtual, it does the same thing as setIndex() does. More...

void	setIndex (const unsigned int index)
	Allows one to assign an index to an object in the handler/container. More...

void	setId (const unsigned int id)
	Assigns a unique identifier to each object in the handler (container) which remains constant even after the object is deleted from the container/handler. More...

unsigned int	getIndex () const
	Returns the index of the object in the handler. More...

unsigned int	getId () const
	Returns the unique identifier of any particular object. More...

Additional Inherited Members
Protected Member Functions inherited from BaseInteraction
Mdouble	getEffectiveRadius () const
	Returns a Mdouble to the effective radius of the interaction. (Not corrected for the overlap) More...

Mdouble	getEffectiveMass () const
	Returns a Mdouble to the effective radius of the interaction. (Not corrected for the overlap) More...

Mdouble	getEffectiveCorrectedRadius ()
	Returns a Mdouble to the effective radius corrected for the overlaps of the particles. More...

void	addForce (Vec3D force)
	add an force increment to the total force. More...

void	addTorque (Vec3D torque)

void	setTorque (Vec3D torque)
	set the total force (this is used by the normal force, tangential torques are added use addTorque) More...

void	setRelativeVelocity (Vec3D relativeVelocity)
	set the relative velocity of the current of the interactions. More...

void	setNormalRelativeVelocity (Mdouble normalRelativeVelocit)
	set the normal component of the relative velocity. More...

void	setAbsoluteNormalForce (Mdouble absoluteNormalForce)
	the absolute values of the norm (length) of the normal force More...

const BaseSpecies *	getBaseSpecies () const
	Return a constant point to BaseSpecies of the interaction. More...

virtual Mdouble	getElasticEnergyAtEquilibrium (Mdouble adhesiveForce) const

virtual void	reverseHistory ()
	When periodic particles some interaction need certain history properties reversing. This is the function for that. More...

Detailed Description

In case one wants to have a frictionless interaction between the interactables (particles or walls), the following class can be used. See Interaction.h, where one can set the FrictionalForceInteraction to EmptyFrictionInteraction.

All the member functions are just dummy methods which basically do nothing but define a interface.

Definition at line 41 of file EmptyFrictionInteraction.h.

Member Typedef Documentation

typedef EmptyFrictionSpecies EmptyFrictionInteraction::SpeciesType

An alias name for EmptyFrictionSpecies.

Definition at line 47 of file EmptyFrictionInteraction.h.

Constructor & Destructor Documentation

EmptyFrictionInteraction::EmptyFrictionInteraction	(	BaseInteractable *	P,
		BaseInteractable *	I,
		Mdouble	timeStamp
	)

Constructor.

Parameters

[in]	P
[in]	I
[in]	timeStamp

Definition at line 38 of file EmptyFrictionInteraction.cc.

     : BaseInteraction(P, I, timeStamp)
 {
 #ifdef DEBUG_CONSTRUCTOR
     std::cout<<"EmptyFrictionInteraction::EmptyFrictionInteraction() finished"<<std::endl;
 #endif
 }

EmptyFrictionInteraction::EmptyFrictionInteraction ( const EmptyFrictionInteraction & p )

Copy constructor.

Parameters

[in] p

Definition at line 48 of file EmptyFrictionInteraction.cc.

     : BaseInteraction(p)
 {
 #ifdef DEBUG_CONSTRUCTOR
     std::cout<<"EmptyFrictionInteraction::EmptyFrictionInteraction(const EmptyFrictionInteraction &p finished"<<std::endl;
 #endif
 }

EmptyFrictionInteraction::~EmptyFrictionInteraction ( )

virtual

Destructor.

Definition at line 58 of file EmptyFrictionInteraction.cc.

 {
 #ifdef DEBUG_DESTRUCTOR
     std::cout<<"EmptyFrictionInteraction::~EmptyFrictionInteraction() finished"<<std::endl;
 #endif
 }

Member Function Documentation

void EmptyFrictionInteraction::computeFrictionForce ( )

Computes nothing, it is an empty function.

Definition at line 77 of file EmptyFrictionInteraction.cc.

78 {}

std::string EmptyFrictionInteraction::getBaseName ( ) const

Returns interaction name/type.

Returns: std::string

Definition at line 115 of file EmptyFrictionInteraction.cc.

 {
     return "";
 }

Mdouble EmptyFrictionInteraction::getElasticEnergy ( ) const

virtual

Returns zero as it is an frictionless interaction.

Returns: Mdouble

Reimplemented from BaseInteraction.

Definition at line 87 of file EmptyFrictionInteraction.cc.

 {
     return 0.0;
 }

const EmptyFrictionSpecies * EmptyFrictionInteraction::getSpecies ( ) const

Returns a const pointer of type EmptyFrictionSpecies*.

Returns: const EmptyFrictionSpecies*

Definition at line 108 of file EmptyFrictionInteraction.cc.

References BaseInteraction::getBaseSpecies().

 {
     return dynamic_cast<const EmptyFrictionSpecies *>(getBaseSpecies());
 }

const Vec3D EmptyFrictionInteraction::getTangentialForce ( ) const

virtual

Returns zero tangential force.

Returns: const Vec3D

Reimplemented from BaseInteraction.

Definition at line 101 of file EmptyFrictionInteraction.cc.

 {
     return Vec3D(0.0,0.0,0.0);
 }

Mdouble EmptyFrictionInteraction::getTangentialOverlap ( ) const

virtual

Returns zero overlap.

Returns: Mdouble

Reimplemented from BaseInteraction.

Definition at line 94 of file EmptyFrictionInteraction.cc.

 {
     return 0.0;
 }

void EmptyFrictionInteraction::integrate ( Mdouble timeStep UNUSED )

virtual

Does nothing as there is no force.

Parameters

[in] timeStep

Reimplemented from BaseInteraction.

Definition at line 82 of file EmptyFrictionInteraction.cc.

83 {}

void EmptyFrictionInteraction::read ( std::istream & is )

virtual

Interaction read function, which accepts an std::istream as input.

Parameters

[in,out] is

Reimplemented from BaseInteraction.

Definition at line 72 of file EmptyFrictionInteraction.cc.

73 {}

void EmptyFrictionInteraction::write ( std::ostream & os ) const

virtual

Interaction write function, which accepts an std::ostream as input.

Parameters

[in,out] os

Reimplemented from BaseInteraction.

Definition at line 67 of file EmptyFrictionInteraction.cc.

68 {}

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

Interactions/FrictionForceInteractions/EmptyFrictionInteraction.h
Interactions/FrictionForceInteractions/EmptyFrictionInteraction.cc

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation