Description

Physical system for an FSI-aware SPH fluid solver.

#include <ChFsiFluidSystemSPH.h>

Inheritance diagram for chrono::fsi::sph::ChFsiFluidSystemSPH:

Collaboration diagram for chrono::fsi::sph::ChFsiFluidSystemSPH:

Classes
struct	ElasticMaterialProperties
	Structure with elastic material properties. More...

struct	FluidProperties
	Structure with fluid properties. More...

struct	LinSolverParameters
	Structure with linear solver parameters (used only for implicit SPH). More...

struct	SPHParameters
	Structure with SPH method parameters. More...

struct	SplashsurfParameters
	Structure with surface reconstruction parameters. More...

Public Member Functions
void	ReadParametersFromFile (const std::string &json_file)
	Read Chrono::FSI parameters from the specified JSON file.

void	EnableCudaErrorCheck (bool val)
	Enable/disable CUDA error checks (default: enabled).

void	SetInitialSpacing (double spacing)
	Set initial spacing.

void	SetKernelMultiplier (double multiplier)
	Set multiplier for interaction length. More...

void	SetShiftingMethod (ShiftingMethod shifting_method)
	Set the shifting method.

void	SetContainerDim (const ChVector3d &box_dim)
	Set the fluid container dimension.

void	SetComputationalDomain (const ChAABB &computational_AABB, BoundaryConditions bc_type)
	Set computational domain and boundary conditions on its sides. More...

void	SetComputationalDomain (const ChAABB &computational_AABB)
	Set computational domain. More...

void	SetActiveDomain (const ChVector3d &box_dim)
	Set dimensions of the active domain AABB. More...

void	SetActiveDomainDelay (double duration)
	Disable use of the active domain for the given duration at the beginning of the simulation (default: 0). More...

void	SetNumBCELayers (int num_layers)
	Set number of BCE marker layers (default: 3).

void	SetDensity (double rho0)
	Set (initial) density.

void	SetShiftingPPSTParameters (double push, double pull)
	Set the PPST Shifting parameters push: coefficient for the pushing term in the PPST shifting method (upon penetration with fictitious sphere) pull: coefficient for the pulling term in the PPST shifting method.

void	SetShiftingXSPHParameters (double eps)
	Set the XSPH Shifting parameters eps: coefficient for the XSPH shifting method.

void	SetShiftingDiffusionParameters (double A, double AFSM, double AFST)
	Set the diffusion based shifting parameters A: coefficient for the diffusion based shifting method AFSM: coefficient for the AFSM in the diffusion based shifting method AFST: coefficient for the AFST in the diffusion based shifting method.

void	SetInitPressure (const double fzDim)
	Set prescribed initial pressure for gravity field.

virtual void	SetGravitationalAcceleration (const ChVector3d &gravity) override
	Set gravity for the FSI syatem.

void	SetBodyForce (const ChVector3d &force)
	Set a constant force applied to the fluid. More...

void	SetConsistentDerivativeDiscretization (bool consistent_gradient, bool consistent_Laplacian)
	Set SPH discretization type, consistent or inconsistent.

void	SetCohesionForce (double Fc)
	Set cohesion force of the granular material.

void	SetSPHLinearSolver (SolverType lin_solver)
	Set the linear system solver for implicit methods.

void	SetIntegrationScheme (IntegrationScheme scheme)
	Set the integration scheme (default: RK2). More...

void	SetNumProximitySearchSteps (int steps)
	Set the number of steps between successive updates to neighbor lists (default: 4).

void	SetCfdSPH (const FluidProperties &fluid_props)
	Enable solution of a CFD problem.

void	SetElasticSPH (const ElasticMaterialProperties &mat_props)
	Enable solution of elastic SPH (for continuum representation of granular dynamics). More...

void	CheckSPHParameters ()
	Checks the applicability of user set parameters for SPH and throws an exception if necessary.

void	SetSPHParameters (const SPHParameters &sph_params)
	Set SPH method parameters.

void	SetLinSolverParameters (const LinSolverParameters &linsolv_params)
	Set linear solver parameters (used only for implicit SPH).

void	SetOutputLevel (OutputLevel output_level)
	Set simulation data output level (default: STATE_PRESSURE). More...

void	SetBoundaryType (BoundaryMethod boundary_method)
	Set boundary treatment type (default: Adami).

void	SetViscosityType (ViscosityMethod viscosity_method)
	Set viscosity treatment type (default: artificial unilateral).

void	SetArtificialViscosityCoefficient (double coefficient)
	Set artificial viscosity coefficient (default: 0.02).

void	SetKernelType (KernelType kernel_type)
	Set kernel type.

double	GetKernelLength () const
	Return the SPH kernel length of kernel function.

double	GetInitialSpacing () const
	Return the initial spacing of the SPH particles.

int	GetNumBCELayers () const
	Return the number of BCE layers.

ChVector3d	GetContainerDim () const
	Get the fluid container dimensions.

ChAABB	GetComputationalDomain () const
	Get the computational domain.

double	GetDensity () const
	Return density.

double	GetViscosity () const
	Return viscosity.

double	GetParticleMass () const
	Return SPH particle mass.

double	GetBasePressure () const
	Return base pressure.

ChVector3d	GetGravitationalAcceleration () const
	Return gravitational acceleration.

double	GetSoundSpeed () const
	Return the speed of sound in the fluid phase.

ChVector3d	GetBodyForce () const
	Return the constant force applied to the fluid (if any). More...

int	GetNumProximitySearchSteps () const
	Get the number of steps between successive updates to neighbor lists.

const ChFsiParamsSPH &	GetParams () const
	Return the current system parameters (debugging only).

size_t	GetNumFluidMarkers () const
	Get the current number of fluid SPH particles.

size_t	GetNumBoundaryMarkers () const
	Get the current number of boundary BCE markers.

size_t	GetNumRigidBodyMarkers () const
	Get the current number of rigid body BCE markers.

size_t	GetNumFlexBodyMarkers () const
	Get the current number of flexible body BCE markers.

std::vector< ChVector3d >	GetParticlePositions () const
	Return the SPH particle positions.

std::vector< ChVector3d >	GetParticleVelocities () const
	Return the SPH particle velocities.

std::vector< ChVector3d >	GetParticleAccelerations () const
	Return the accelerations of SPH particles.

std::vector< ChVector3d >	GetParticleForces () const
	Return the forces acting on SPH particles.

std::vector< ChVector3d >	GetParticleFluidProperties () const
	Return the SPH particle fluid properties. More...

BoundaryMethod	GetBoundaryType () const
	Return the boundary treatment type.

ViscosityMethod	GetViscosityType () const
	Return the viscosity treatment type.

KernelType	GetKernelType () const
	Return the kernel type.

void	WriteParticleFile (const std::string &filename) const
	Write FSI system particle output.

void	SaveParticleData (const std::string &dir) const
	Save current SPH particle and BCE marker data to files. More...

void	SaveSolidData (const std::string &dir, double time) const
	Save current FSI solid data to files. More...

void	AddSPHParticle (const ChVector3d &pos, double rho, double pres, double mu, const ChVector3d &vel=ChVector3d(0), const ChVector3d &tauXxYyZz=ChVector3d(0), const ChVector3d &tauXyXzYz=ChVector3d(0))
	Add an SPH particle with given properties to the FSI system.

void	AddSPHParticle (const ChVector3d &pos, const ChVector3d &vel=ChVector3d(0), const ChVector3d &tauXxYyZz=ChVector3d(0), const ChVector3d &tauXyXzYz=ChVector3d(0))
	Add an SPH particle with current properties to the SPH system.

void	AddBoxSPH (const ChVector3d &boxCenter, const ChVector3d &boxHalfDim)
	Create SPH particles in the specified box volume. More...

void	AddPlateBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, const ChVector2d &size)
	Add BCE markers for a rectangular plate of specified X-Y dimensions and associate them with the given body. More...

void	AddBoxContainerBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, const ChVector3d &size, const ChVector3i faces)
	Add BCE markers for a box container of specified dimensions and associate them with the given body. More...

size_t	AddBoxBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, const ChVector3d &size, bool solid)
	Add BCE markers for a box of specified dimensions and associate them with the given body. More...

size_t	AddSphereBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, double radius, bool solid, bool polar=true)
	Add BCE markers for a sphere of specified radius and associate them with the given body. More...

size_t	AddCylinderBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, double radius, double height, bool solid, bool polar=true)
	Add BCE markers for a cylinder of specified radius and height and associate them with the given body. More...

size_t	AddConeBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, double radius, double height, bool solid, bool polar=true)
	Add BCE markers for a cone of specified radius and height and associate them with the given body. More...

size_t	AddCylinderAnnulusBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, double radius_inner, double radius_outer, double height, bool polar=true)
	Add BCE markers for a cylindrical annulus of specified radii and height and associate them with the given body. More...

size_t	AddPointsBCE (std::shared_ptr< ChBody > body, const std::vector< ChVector3d > &points, const ChFrame<> &rel_frame, bool solid)
	Add BCE markers from a set of points and associate them with the given body. More...

void	SetBcePattern1D (BcePatternMesh1D pattern, bool remove_center=false)
	Set the BCE marker pattern for 1D flexible solids for subsequent calls to AddFsiMesh. More...

void	SetBcePattern2D (BcePatternMesh2D pattern, bool remove_center=false)
	Set the BCE marker pattern for 2D flexible solids for subsequent calls to AddFsiMesh. More...

std::vector< int >	FindParticlesInBox (const ChFrame<> &frame, const ChVector3d &size)
	Utility function for finding indices of SPH particles inside a given OBB. More...

std::vector< Real3 >	GetPositions () const
	Extract positions of all markers (SPH and BCE).

std::vector< Real3 >	GetVelocities () const
	Extract velocities of all markers (SPH and BCE).

std::vector< Real3 >	GetAccelerations () const
	Extract accelerations of all markers (SPH and BCE).

std::vector< Real3 >	GetForces () const
	Extract forces applied to all markers (SPH and BCE).

std::vector< Real3 >	GetProperties () const
	Extract fluid properties of all markers (SPH and BCE). More...

std::vector< Real3 >	GetPositions (const std::vector< int > &indices) const
	Extract positions of all markers (SPH and BCE) with indices in the provided array.

std::vector< Real3 >	GetVelocities (const std::vector< int > &indices) const
	Extract velocities of all markers (SPH and BCE) with indices in the provided array.

std::vector< Real3 >	GetAccelerations (const std::vector< int > &indices) const
	Extract accelerations of all markers (SPH and BCE) with indices in the provided array.

std::vector< Real3 >	GetForces (const std::vector< int > &indices) const
	Extract forces applied to allmarkers (SPH and BCE) with indices in the provided array.

void	CreateBCE_Plate (const ChVector2d &size, std::vector< ChVector3d > &bce)
	Create BCE markers on a rectangular plate of specified X-Y dimensions, assumed centered at the origin. More...

void	CreateBCE_BoxInterior (const ChVector3d &size, std::vector< ChVector3d > &bce)
	Create BCE interior markers for a box of specified dimensions, assumed centered at the origin. More...

void	CreateBCE_BoxExterior (const ChVector3d &size, std::vector< ChVector3d > &bce)
	Create exterior BCE markers for a box of specified dimensions, assumed centered at the origin. More...

void	CreateBCE_SphereInterior (double radius, bool polar, std::vector< ChVector3d > &bce)
	Create interior BCE markers for a sphere of specified radius, assumed centered at the origin. More...

void	CreateBCE_SphereExterior (double radius, bool polar, std::vector< ChVector3d > &bce)
	Create exterior BCE markers for a sphere of specified radius, assumed centered at the origin. More...

void	CreateBCE_CylinderInterior (double rad, double height, bool polar, std::vector< ChVector3d > &bce)
	Create interior BCE markers for a cylinder of specified radius and height. More...

void	CreateBCE_CylinderExterior (double rad, double height, bool polar, std::vector< ChVector3d > &bce)
	Create exterior BCE markers for a cylinder of specified radius and height. More...

void	CreateBCE_ConeInterior (double rad, double height, bool polar, std::vector< ChVector3d > &bce)
	Create interior BCE particles for a cone of specified radius and height. More...

void	CreateBCE_ConeExterior (double rad, double height, bool polar, std::vector< ChVector3d > &bce)
	Create exterior BCE particles for a cone of specified radius and height. More...

PhysicsProblem	GetPhysicsProblem () const

std::string	GetPhysicsProblemString () const

std::string	GetSphIntegrationSchemeString () const

Public Member Functions inherited from chrono::fsi::ChFsiFluidSystem
void	SetVerbose (bool verbose)
	Enable/disable verbose terminal output (default: true).

void	SetStepSize (double step)
	Set integration step size.

virtual void	Initialize ()
	Initialize the fluid system with no FSI support.

void	DoStepDynamics (double step)
	Function to integrate the FSI fluid system in time.

double	GetSimTime () const
	Get current simulation time.

double	GetStepSize () const
	Get the integration step size.

double	GetRtf () const
	Get current estimated RTF (real time factor).

double	GetTimerStep () const
	Return the time in seconds for fluid dynamics over the last step.

Static Public Member Functions
static void	CreatePoints_CylinderAnnulus (double rad_inner, double rad_outer, double height, bool polar, double delta, std::vector< ChVector3d > &points)
	Create points at suggested separation 'delta' filling a cylindrical annulus of specified radii and height. More...

static void	CreatePoints_Mesh (ChTriangleMeshConnected &mesh, double delta, std::vector< ChVector3d > &points)
	Create points at suggested separation 'delta' filling a closed mesh. More...

Friends
class	ChFsiSystemSPH

class	ChFsiInterfaceSPH

class	ChFsiProblemSPH

class	ChFsiSplashsurfSPH

Additional Inherited Members
Protected Attributes inherited from chrono::fsi::ChFsiFluidSystem
bool	m_verbose
	enable/disable m_verbose terminal output

std::string	m_outdir
	output directory

bool	m_is_initialized
	set to true once the Initialize function is called

double	m_step
	time step for fluid dynamics

unsigned int	m_frame
	current simulation frame

Member Function Documentation

◆ AddBoxBCE()

size_t chrono::fsi::sph::ChFsiFluidSystemSPH::AddBoxBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		const ChVector3d &	size,
		bool	solid
	)

Add BCE markers for a box of specified dimensions and associate them with the given body.

The box is assumed to be centered at the origin of the provided frame and aligned with its axes. BCE markers are created inside the box if solid=true, and outside the box otherwise. BCE markers are created in a number of layers corresponding to system parameters.

◆ AddBoxContainerBCE()

void chrono::fsi::sph::ChFsiFluidSystemSPH::AddBoxContainerBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		const ChVector3d &	size,
		const ChVector3i	faces
	)

Add BCE markers for a box container of specified dimensions and associate them with the given body.

The center of the box volume is at the origin of the given frame and the the container is aligned with the frame axes. Such a container is assumed to be used as a boundary. The 'faces' input vector specifies which faces of the container are to be created: for each direction, a value of -1 indicates the face in the negative direction, a value of +1 indicates the face in the positive direction, and a value of 2 indicates both faces. Setting a value of 0 does not create container faces in that direction. BCE markers are created in a number of layers corresponding to system parameters. Such a container is assumed to be used as a fixed boundary and the associated body is not tracked in FSI.

◆ AddBoxSPH()

void chrono::fsi::sph::ChFsiFluidSystemSPH::AddBoxSPH	(	const ChVector3d &	boxCenter,
		const ChVector3d &	boxHalfDim
	)

Create SPH particles in the specified box volume.

The SPH particles are created on a uniform grid with resolution equal to the FSI initial separation.

◆ AddConeBCE()

size_t chrono::fsi::sph::ChFsiFluidSystemSPH::AddConeBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		double	radius,
		double	height,
		bool	solid,
		bool	polar = `true`
	)

Add BCE markers for a cone of specified radius and height and associate them with the given body.

The cone is assumed centered at the origin of the provided frame and aligned with its Z axis. BCE markers are created inside the cone if solid=true, and outside the cone otherwise. BCE markers are created in a number of layers corresponding to system parameters. BCE markers are created using cylinderical coordinates (default), or else on a uniform Cartesian grid.

◆ AddCylinderAnnulusBCE()

size_t chrono::fsi::sph::ChFsiFluidSystemSPH::AddCylinderAnnulusBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		double	radius_inner,
		double	radius_outer,
		double	height,
		bool	polar = `true`
	)

Add BCE markers for a cylindrical annulus of specified radii and height and associate them with the given body.

The cylindrical annulus is assumed centered at the origin of the provided frame and aligned with its Z axis. BCE markers are created in a number of layers corresponding to system parameters. BCE markers are created using cylinderical coordinates (default), or else on a uniform Cartesian grid. Such a cylindrical annulus is assumed to be used on a solid body.

◆ AddCylinderBCE()

size_t chrono::fsi::sph::ChFsiFluidSystemSPH::AddCylinderBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		double	radius,
		double	height,
		bool	solid,
		bool	polar = `true`
	)

Add BCE markers for a cylinder of specified radius and height and associate them with the given body.

The cylinder is assumed centered at the origin of the provided frame and aligned with its Z axis. BCE markers are created inside the cylinder if solid=true, and outside the cylinder otherwise. BCE markers are created in a number of layers corresponding to system parameters. BCE markers are created using cylinderical coordinates (default), or else on a uniform Cartesian grid.

◆ AddPlateBCE()

void chrono::fsi::sph::ChFsiFluidSystemSPH::AddPlateBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		const ChVector2d &	size
	)

Add BCE markers for a rectangular plate of specified X-Y dimensions and associate them with the given body.

BCE markers are created in a number of layers corresponding to system parameters. X-Y BCE layers are created in the negative Z direction of the plate orientation frame. Such a plate is assumed to be used as boundary.

◆ AddPointsBCE()

size_t chrono::fsi::sph::ChFsiFluidSystemSPH::AddPointsBCE	(	std::shared_ptr< ChBody >	body,
		const std::vector< ChVector3d > &	points,
		const ChFrame<> &	rel_frame,
		bool	solid
	)

Add BCE markers from a set of points and associate them with the given body.

The points are assumed to be provided relative to the specified frame. The BCE markers are created in the absolute coordinate frame.

◆ AddSphereBCE()

size_t chrono::fsi::sph::ChFsiFluidSystemSPH::AddSphereBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		double	radius,
		bool	solid,
		bool	polar = `true`
	)

Add BCE markers for a sphere of specified radius and associate them with the given body.

The sphere is assumed to be centered at the origin of the provided frame. BCE markers are created inside the sphere if solid=true, and outside the sphere otherwise. BCE markers are created in a number of layers corresponding to system parameters. BCE markers are created using spherical coordinates (default), or else on a uniform Cartesian grid.

◆ CreateBCE_BoxExterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_BoxExterior	(	const ChVector3d &	size,
		std::vector< ChVector3d > &	bce
	)

Create exterior BCE markers for a box of specified dimensions, assumed centered at the origin.

BCE markers are created outside the box, in a number of layers corresponding to system parameters.

◆ CreateBCE_BoxInterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_BoxInterior	(	const ChVector3d &	size,
		std::vector< ChVector3d > &	bce
	)

Create BCE interior markers for a box of specified dimensions, assumed centered at the origin.

BCE markers are created inside the box, in a number of layers corresponding to system parameters.

◆ CreateBCE_ConeExterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_ConeExterior	(	double	rad,
		double	height,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

Create exterior BCE particles for a cone of specified radius and height.

The cone is assumed centered at the origin and aligned with the Z axis. BCE markers are created outside the cone, in a number of layers corresponding to system parameters. BCE markers are created using cylinderical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_ConeInterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_ConeInterior	(	double	rad,
		double	height,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

Create interior BCE particles for a cone of specified radius and height.

The cone is assumed centered at the origin and aligned with the Z axis. BCE markers are created inside the cone, in a number of layers corresponding to system parameters. BCE markers are created using cylinderical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_CylinderExterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_CylinderExterior	(	double	rad,
		double	height,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

Create exterior BCE markers for a cylinder of specified radius and height.

The cylinder is assumed centered at the origin and aligned with the Z axis. BCE markers are created outside the cylinder, in a number of layers corresponding to system parameters. BCE markers are created using cylindrical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_CylinderInterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_CylinderInterior	(	double	rad,
		double	height,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

Create interior BCE markers for a cylinder of specified radius and height.

The cylinder is assumed centered at the origin and aligned with the Z axis. BCE markers are created inside the cylinder, in a number of layers corresponding to system parameters. BCE markers are created using cylindrical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_Plate()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_Plate	(	const ChVector2d &	size,
		std::vector< ChVector3d > &	bce
	)

Create BCE markers on a rectangular plate of specified X-Y dimensions, assumed centered at the origin.

BCE markers are created in a number of layers corresponding to system parameters. BCE layers are created in the negative Z direction.

◆ CreateBCE_SphereExterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_SphereExterior	(	double	radius,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

Create exterior BCE markers for a sphere of specified radius, assumed centered at the origin.

BCE markers are created outside the sphere, in a number of layers corresponding to system parameters. BCE markers are created using spherical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_SphereInterior()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreateBCE_SphereInterior	(	double	radius,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

Create interior BCE markers for a sphere of specified radius, assumed centered at the origin.

BCE markers are created inside the sphere, in a number of layers corresponding to system parameters. BCE markers are created using spherical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreatePoints_CylinderAnnulus()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreatePoints_CylinderAnnulus	(	double	rad_inner,
		double	rad_outer,
		double	height,
		bool	polar,
		double	delta,
		std::vector< ChVector3d > &	points
	)

static

Create points at suggested separation 'delta' filling a cylindrical annulus of specified radii and height.

The cylinder annulus is assumed centered at the origin and aligned with the Z axis. BCE markers are created using cylindrical coordinates (polar=true), or else on a uniform Cartesian grid.

◆ CreatePoints_Mesh()

void chrono::fsi::sph::ChFsiFluidSystemSPH::CreatePoints_Mesh	(	ChTriangleMeshConnected &	mesh,
		double	delta,
		std::vector< ChVector3d > &	points
	)

static

Create points at suggested separation 'delta' filling a closed mesh.

Calculate uu parameter and test bound

ray intersection

◆ FindParticlesInBox()

std::vector< int > chrono::fsi::sph::ChFsiFluidSystemSPH::FindParticlesInBox	(	const ChFrame<> &	frame,
		const ChVector3d &	size
	)

Utility function for finding indices of SPH particles inside a given OBB.

The object-oriented box, of specified size, is assumed centered at the origin of the provided frame and aligned with the axes of that frame.

◆ GetBodyForce()

ChVector3d chrono::fsi::sph::ChFsiFluidSystemSPH::GetBodyForce ( ) const

Return the constant force applied to the fluid (if any).

TODO: RENAME

◆ GetParticleFluidProperties()

std::vector< ChVector3d > chrono::fsi::sph::ChFsiFluidSystemSPH::GetParticleFluidProperties ( ) const

Return the SPH particle fluid properties.

For each SPH particle, the 3-dimensional vector contains density, pressure, and viscosity.

◆ GetProperties()

std::vector< Real3 > chrono::fsi::sph::ChFsiFluidSystemSPH::GetProperties ( ) const

Extract fluid properties of all markers (SPH and BCE).

For each SPH particle, the 3-dimensional vector contains density, pressure, and viscosity.

◆ SaveParticleData()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SaveParticleData ( const std::string & dir ) const

Save current SPH particle and BCE marker data to files.

This function creates three CSV files for SPH particles, boundary BCE markers, and solid BCE markers data.

◆ SaveSolidData()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SaveSolidData	(	const std::string &	dir,
		double	time
	)		const

Save current FSI solid data to files.

This function creates CSV files for force and torque on rigid bodies and flexible nodes.

◆ SetActiveDomain()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetActiveDomain ( const ChVector3d & box_dim )

Set dimensions of the active domain AABB.

This value activates only those SPH particles that are within an AABB of the specified size from an object interacting with the "fluid" phase. Note that this setting should not be used for CFD simulations, but rather only when solving problems using the CRM (continuum representation of granular dynamics) for terramechanics simulations.

◆ SetActiveDomainDelay()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetActiveDomainDelay ( double duration )

Disable use of the active domain for the given duration at the beginning of the simulation (default: 0).

This parameter is used for settling operations where all particles must be active through the settling process.

◆ SetBcePattern1D()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetBcePattern1D	(	BcePatternMesh1D	pattern,
		bool	remove_center = `false`
	)

Set the BCE marker pattern for 1D flexible solids for subsequent calls to AddFsiMesh.

By default, a full set of BCE markers is used across each section, including a central marker.

Parameters

pattern	marker pattern in cross-section
remove_center	eliminate markers on center line

◆ SetBcePattern2D()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetBcePattern2D	(	BcePatternMesh2D	pattern,
		bool	remove_center = `false`
	)

Set the BCE marker pattern for 2D flexible solids for subsequent calls to AddFsiMesh.

By default, BCE markers are created centered on the mesh surface, with a layer of BCEs on the surface.

Parameters

pattern	pattern of marker locations along normal
remove_center	eliminate markers on surface

◆ SetBodyForce()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetBodyForce ( const ChVector3d & force )

Set a constant force applied to the fluid.

Solid bodies are not explicitly affected by this force, but they are affected indirectly through the fluid.

◆ SetComputationalDomain() [1/2]

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetComputationalDomain ( const ChAABB & computational_AABB )

Set computational domain.

Note that this version leaves the setting for BC type unchanged.

◆ SetComputationalDomain() [2/2]

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetComputationalDomain	(	const ChAABB &	computational_AABB,
		BoundaryConditions	bc_type
	)

Set computational domain and boundary conditions on its sides.

bc_type indicates the types of BCs imposed in the three directions of the computational domain. By default, no special boundary conditions are imposed in any direction (BCType::NONE).

◆ SetElasticSPH()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetElasticSPH ( const ElasticMaterialProperties & mat_props )

Enable solution of elastic SPH (for continuum representation of granular dynamics).

By default, a ChSystemFSI solves an SPH fluid dynamics problem.

◆ SetIntegrationScheme()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetIntegrationScheme ( IntegrationScheme scheme )

Set the integration scheme (default: RK2).

All explicit integration schemes use a so-called Weakly-Compressible SPH formulation, based on an equation of state that relates pressure to density.

◆ SetKernelMultiplier()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetKernelMultiplier ( double multiplier )

Set multiplier for interaction length.

h = multiplier * initial_spacing.

◆ SetOutputLevel()

void chrono::fsi::sph::ChFsiFluidSystemSPH::SetOutputLevel ( OutputLevel output_level )

Set simulation data output level (default: STATE_PRESSURE).

Options:

STATE marker state, velocity, and acceleration
STATE_PRESSURE STATE plus density and pressure
CFD_FULL STATE_PRESSURE plus various CFD parameters
CRM_FULL STATE_PRESSURE plus normal and shear stress

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

/builds/uwsbel/chrono/src/chrono_fsi/sph/ChFsiFluidSystemSPH.h
/builds/uwsbel/chrono/src/chrono_fsi/sph/ChFsiFluidSystemSPH.cpp