Forces between particles and walls, interacting with a spring, slider, damper model. More...

Inheritance diagram for WallSpringSliderDashpot< CloudType >:

Collaboration diagram for WallSpringSliderDashpot< CloudType >:

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

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

virtual	~WallSpringSliderDashpot ()
	Destructor. More...

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

virtual scalar	pREff (const typename CloudType::parcelType &p) const
	Return the effective radius for a particle for the model. More...

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

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

virtual void	evaluateWall (typename CloudType::parcelType &p, const List< point > &flatSitePoints, const List< WallSiteData< vector > > &flatSiteData, const List< point > &sharpSitePoints, const List< WallSiteData< vector > > &sharpSiteData) const
	Calculate the wall interaction for a parcel. More...

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

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

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

virtual	~WallModel ()
	Destructor. More...

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

CloudType &	owner ()
	Return non-const access to 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 WallModel has a timestep limit that will. More...

virtual label	nSubCycles () const=0
	For WallModels 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...

void	evaluateWall (typename CloudType::parcelType &p, const point &site, const WallSiteData< vector > &data, scalar pREff, scalar kN, bool cohesion) const
	Calculate the wall interaction for a parcel at a given site. More...

Private Attributes
scalar	Estar_
	Effective Young's modulus value. More...

scalar	Gstar_
	Effective shear modulus value. 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_

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 WallModel< CloudType >
static autoPtr< WallModel< CloudType > >	New (const dictionary &dict, CloudType &owner)
	Selector. More...

Detailed Description

template<class CloudType>
class Foam::WallSpringSliderDashpot< CloudType >

Forces between particles and walls, interacting with a spring, slider, damper model.

Definition at line 46 of file WallSpringSliderDashpot.H.

Constructor & Destructor Documentation

◆ WallSpringSliderDashpot()

WallSpringSliderDashpot	(	const dictionary &	dict,
		CloudType &	cloud
	)

Construct from dictionary.

Definition at line 162 of file WallSpringSliderDashpot.C.

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

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◆ ~WallSpringSliderDashpot()

~WallSpringSliderDashpot

virtual

Destructor.

Definition at line 212 of file WallSpringSliderDashpot.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 WallSpringSliderDashpot.C.

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

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◆ evaluateWall() [1/2]

void evaluateWall	(	typename CloudType::parcelType &	p,
		const point &	site,
		const WallSiteData< vector > &	data,
		scalar	pREff,
		scalar	kN,
		bool	cohesion
	)		const

private

Calculate the wall interaction for a parcel at a given site.

Definition at line 75 of file WallSpringSliderDashpot.C.

References Foam::mag(), Foam::max(), p, Foam::constant::mathematical::pi(), Foam::pow(), Foam::pow025(), Foam::sqr(), and Foam::sqrt().

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◆ TypeName()

TypeName ( "wallSpringSliderDashpot" )

Runtime type information.

◆ volumeFactor()

scalar volumeFactor ( ) const

inline

Return the volumeFactor.

Definition at line 142 of file WallSpringSliderDashpot.H.

References WallSpringSliderDashpot< CloudType >::volumeFactor_.

◆ pREff()

Foam::scalar pREff ( const typename CloudType::parcelType & p ) const

virtual

Return the effective radius for a particle for the model.

Implements WallModel< CloudType >.

Definition at line 220 of file WallSpringSliderDashpot.C.

References Foam::cbrt(), and p.

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◆ controlsTimestep()

bool controlsTimestep

virtual

Whether the WallModel has a timestep limit that will.

require subCycling

Definition at line 236 of file WallSpringSliderDashpot.C.

◆ nSubCycles()

Foam::label nSubCycles

virtual

For WallModels that control the timestep, calculate the.

number of subCycles needed to satisfy the minimum allowable timestep

Definition at line 243 of file WallSpringSliderDashpot.C.

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

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◆ evaluateWall() [2/2]

void evaluateWall	(	typename CloudType::parcelType &	p,
		const List< point > &	flatSitePoints,
		const List< WallSiteData< vector > > &	flatSiteData,
		const List< point > &	sharpSitePoints,
		const List< WallSiteData< vector > > &	sharpSiteData
	)		const

virtual

Calculate the wall interaction for a parcel.

Implements WallModel< CloudType >.

Definition at line 269 of file WallSpringSliderDashpot.C.

References forAll, p, and Foam::sqrt().

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Field Documentation

◆ Estar_

scalar Estar_

private

Effective Young's modulus value.

Definition at line 53 of file WallSpringSliderDashpot.H.

◆ Gstar_

scalar Gstar_

private

Effective shear modulus value.

Definition at line 56 of file WallSpringSliderDashpot.H.

◆ alpha_

scalar alpha_

private

alpha-coefficient, related to coefficient of restitution

Definition at line 59 of file WallSpringSliderDashpot.H.

◆ b_

scalar b_

private

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

Definition at line 62 of file WallSpringSliderDashpot.H.

◆ mu_

scalar mu_

private

Coefficient of friction in for tangential sliding.

Definition at line 65 of file WallSpringSliderDashpot.H.

◆ cohesionEnergyDensity_

scalar cohesionEnergyDensity_

private

Cohesion energy density [J/m^3].

Definition at line 68 of file WallSpringSliderDashpot.H.

◆ cohesion_

bool cohesion_

private

Definition at line 71 of file WallSpringSliderDashpot.H.

◆ collisionResolutionSteps_

scalar collisionResolutionSteps_

private

The number of steps over which to resolve the minimum.

harmonic approximation of the collision period

Definition at line 75 of file WallSpringSliderDashpot.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 93 of file WallSpringSliderDashpot.H.

Referenced by WallSpringSliderDashpot< 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 97 of file WallSpringSliderDashpot.H.

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

src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/PairCollision/WallModel/WallSpringSliderDashpot/WallSpringSliderDashpot.H
src/lagrangian/intermediate/submodels/Kinematic/CollisionModel/PairCollision/WallModel/WallSpringSliderDashpot/WallSpringSliderDashpot.C

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

template<class CloudType> class Foam::WallSpringSliderDashpot< CloudType >

Constructor & Destructor Documentation

◆ WallSpringSliderDashpot()

◆ ~WallSpringSliderDashpot()

Member Function Documentation

◆ findMinMaxProperties()

◆ evaluateWall() [1/2]

◆ TypeName()

◆ volumeFactor()

◆ pREff()

◆ controlsTimestep()

◆ nSubCycles()

◆ evaluateWall() [2/2]

Field Documentation

◆ Estar_

◆ Gstar_

◆ alpha_

◆ b_

◆ mu_

◆ cohesionEnergyDensity_

◆ cohesion_

◆ collisionResolutionSteps_

◆ volumeFactor_

◆ useEquivalentSize_

template<class CloudType>
class Foam::WallSpringSliderDashpot< CloudType >