Pair forces between particles colliding with a spring, slider, damper model. More...

Inheritance diagram for PairSpringSliderDashpot< CloudType >:

Collaboration diagram for PairSpringSliderDashpot< CloudType >:

Public Member Functions
	TypeName ("pairSpringSliderDashpot")
	Runtime type information. More...

	PairSpringSliderDashpot (const dictionary &dict, CloudType &cloud)
	Construct from dictionary. More...

virtual	~PairSpringSliderDashpot ()
	Destructor. More...

scalar	volumeFactor () const
	Return the volumeFactor. More...

scalar	overlapArea (scalar rA, scalar rB, scalar rAB) const
	Return the area of overlap between two spheres of radii rA and rB,. More...

virtual bool	controlsTimestep () const
	Whether the PairModel has a timestep limit that will. More...

virtual label	nSubCycles () const
	For PairModels that control the timestep, calculate the. More...

virtual void	evaluatePair (typename CloudType::parcelType &pA, typename CloudType::parcelType &pB) const
	Calculate the pair interaction between parcels. More...

Public Member Functions inherited from PairModel< CloudType >
	TypeName ("pairModel")
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, PairModel, dictionary,(const dictionary &dict, CloudType &owner),(dict, owner))
	Declare runtime constructor selection table. More...

	PairModel (const dictionary &dict, CloudType &owner, const word &type)
	Construct from components. More...

virtual	~PairModel ()
	Destructor. More...

const CloudType &	owner () const
	Return the owner cloud object. More...

const dictionary &	dict () const
	Return the dictionary. More...

const dictionary &	coeffDict () const
	Return the coefficients dictionary. More...

virtual bool	controlsTimestep () const=0
	Whether the PairModel has a timestep limit that will. More...

virtual label	nSubCycles () const=0
	For PairModels that control the timestep, calculate the. More...

Private Member Functions
void	findMinMaxProperties (scalar &RMin, scalar &rhoMax, scalar &vMagMax) const
	Find the appropriate properties for determining the minimum. More...

Private Attributes
scalar	Estar_
	Effective Young's modulus value, assuming both particles have. More...

scalar	Gstar_
	Effective shear modulus value, assuming both particles have. More...

scalar	alpha_
	alpha-coefficient, related to coefficient of restitution More...

scalar	b_
	Spring power (b = 1 for linear, b = 3/2 for Hertzian) More...

scalar	mu_
	Coefficient of friction in for tangential sliding. More...

scalar	cohesionEnergyDensity_
	Cohesion energy density [J/m^3]. More...

bool	cohesion_
	Switch cohesion on and off. More...

scalar	collisionResolutionSteps_
	The number of steps over which to resolve the minimum. More...

scalar	volumeFactor_
	Volume factor for determining the equivalent size of a. More...

bool	useEquivalentSize_
	Switch to control use of equivalent size particles. Used. More...

Additional Inherited Members
Static Public Member Functions inherited from PairModel< CloudType >
static autoPtr< PairModel< CloudType > >	New (const dictionary &dict, CloudType &owner)
	Selector. More...

Detailed Description

template<class CloudType>
class Foam::PairSpringSliderDashpot< CloudType >

Pair forces between particles colliding with a spring, slider, damper model.

Definition at line 47 of file PairSpringSliderDashpot.H.

Constructor & Destructor Documentation

◆ PairSpringSliderDashpot()

PairSpringSliderDashpot	(	const dictionary &	dict,
		CloudType &	cloud
	)

Construct from dictionary.

Definition at line 84 of file PairSpringSliderDashpot.C.

References Foam::constant::universal::G, lookup(), Foam::mag(), nu, readScalar, and Foam::sqr().

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◆ ~PairSpringSliderDashpot()

~PairSpringSliderDashpot

virtual

Destructor.

Definition at line 129 of file PairSpringSliderDashpot.C.

Member Function Documentation

◆ findMinMaxProperties()

void findMinMaxProperties	(	scalar &	RMin,
		scalar &	rhoMax,
		scalar &	vMagMax
	)		const

private

Find the appropriate properties for determining the minimum.

allowable timestep

Definition at line 32 of file PairSpringSliderDashpot.C.

References Foam::cbrt(), forAllConstIter(), Foam::mag(), Foam::max(), Foam::min(), p, and rhoMax().

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◆ TypeName()

TypeName ( "pairSpringSliderDashpot" )

Runtime type information.

◆ volumeFactor()

scalar volumeFactor ( ) const

inline

Return the volumeFactor.

Definition at line 133 of file PairSpringSliderDashpot.H.

References PairSpringSliderDashpot< CloudType >::volumeFactor_.

◆ overlapArea()

scalar overlapArea	(	scalar	rA,
		scalar	rB,
		scalar	rAB
	)		const

inline

Return the area of overlap between two spheres of radii rA and rB,.

centres separated by a distance rAB. Assumes rAB < (rA + rB).

Definition at line 140 of file PairSpringSliderDashpot.H.

◆ controlsTimestep()

bool controlsTimestep

virtual

Whether the PairModel has a timestep limit that will.

require subCycling

Definition at line 136 of file PairSpringSliderDashpot.C.

◆ nSubCycles()

Foam::label nSubCycles

virtual

For PairModels that control the timestep, calculate the.

number of subCycles needed to satisfy the minimum allowable timestep

Definition at line 143 of file PairSpringSliderDashpot.C.

References Foam::pow(), rhoMax(), and Foam::sqrt().

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◆ evaluatePair()

void evaluatePair	(	typename CloudType::parcelType &	pA,
		typename CloudType::parcelType &	pB
	)		const

virtual

Calculate the pair interaction between parcels.

Implements PairModel< CloudType >.

Definition at line 169 of file PairSpringSliderDashpot.C.

References Foam::cbrt(), M, Foam::mag(), Foam::pow(), Foam::pow025(), R, and Foam::sqrt().

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Field Documentation

◆ Estar_

scalar Estar_

private

Effective Young's modulus value, assuming both particles have.

the same E value

Definition at line 55 of file PairSpringSliderDashpot.H.

◆ Gstar_

scalar Gstar_

private

Effective shear modulus value, assuming both particles have.

the same Poisson's ratio and Young's modulus

Definition at line 59 of file PairSpringSliderDashpot.H.

◆ alpha_

scalar alpha_

private

alpha-coefficient, related to coefficient of restitution

Definition at line 62 of file PairSpringSliderDashpot.H.

◆ b_

scalar b_

private

Spring power (b = 1 for linear, b = 3/2 for Hertzian)

Definition at line 65 of file PairSpringSliderDashpot.H.

◆ mu_

scalar mu_

private

Coefficient of friction in for tangential sliding.

Definition at line 68 of file PairSpringSliderDashpot.H.

◆ cohesionEnergyDensity_

scalar cohesionEnergyDensity_

private

Cohesion energy density [J/m^3].

Definition at line 71 of file PairSpringSliderDashpot.H.

◆ cohesion_

bool cohesion_

private

Switch cohesion on and off.

Definition at line 74 of file PairSpringSliderDashpot.H.

◆ collisionResolutionSteps_

scalar collisionResolutionSteps_

private

The number of steps over which to resolve the minimum.

harmonic approximation of the collision period

Definition at line 78 of file PairSpringSliderDashpot.H.

◆ volumeFactor_

scalar volumeFactor_

private

Volume factor for determining the equivalent size of a.

parcel where nParticles is not 1. The equivalent size of the parcel is parcelEquivVolume = volumeFactor*nParticles*p.volume() so parcelEquivD = cbrt(volumeFactor*nParticles)*p.d() + When volumeFactor = 1, the particles are compressed together so that the equivalent volume of the parcel is the sum of the constituent particles + When volumeFactor = 3*sqrt(2)/pi, the particles are close packed, but uncompressed. + When volumeFactor > 3*sqrt(2)/pi, the particles loosely grouped. 3*sqrt(2)/pi = 1.350474 is the volume factor for close packing, i.e pi/(3*sqrt(2)) is the maximum close packing factor

Definition at line 96 of file PairSpringSliderDashpot.H.

Referenced by PairSpringSliderDashpot< CloudType >::volumeFactor().

◆ useEquivalentSize_

bool useEquivalentSize_

private

Switch to control use of equivalent size particles. Used.

because the calculation can be very expensive.

Definition at line 100 of file PairSpringSliderDashpot.H.

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

src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/PairCollision/PairModel/PairSpringSliderDashpot/PairSpringSliderDashpot.H
src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/PairCollision/PairModel/PairSpringSliderDashpot/PairSpringSliderDashpot.C

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

template<class CloudType> class Foam::PairSpringSliderDashpot< CloudType >

Constructor & Destructor Documentation

◆ PairSpringSliderDashpot()

◆ ~PairSpringSliderDashpot()

Member Function Documentation

◆ findMinMaxProperties()

◆ TypeName()

◆ volumeFactor()

◆ overlapArea()

◆ controlsTimestep()

◆ nSubCycles()

◆ evaluatePair()

Field Documentation

◆ Estar_

◆ Gstar_

◆ alpha_

◆ b_

◆ mu_

◆ cohesionEnergyDensity_

◆ cohesion_

◆ collisionResolutionSteps_

◆ volumeFactor_

◆ useEquivalentSize_

template<class CloudType>
class Foam::PairSpringSliderDashpot< CloudType >