Description

Physical system for fluid-solid interaction problems.

This class is used to represent fluid-solid interaction problems consisting of fluid dynamics and multibody system. Each of the two underlying physics is an independent object owned and instantiated by this class. The FSI system owns other objects to handle the interface between the two systems, boundary condition enforcing markers, and data.

#include <ChSystemFsi.h>

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...

Public Types
enum	PhysicsProblem { CFD, CRM }
	Physics problem type.

enum	OutputMode { OutputMode::CSV, OutputMode::CHPF, OutputMode::NONE }
	Output mode. More...

Public Member Functions
	ChSystemFsi (ChSystem *sysMBS=nullptr)
	Constructor for FSI system.

	~ChSystemFsi ()
	Destructor for the FSI system.

void	AttachSystem (ChSystem *sysMBS)
	Attach Chrono MBS system.

void	DoStepDynamics_FSI ()
	Function to integrate the FSI system in time. More...

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

double	GetRatioMBS () const
	Get ratio of simulation time spent in MBS integration.

void	SetVerbose (bool verbose)
	Enable/disable verbose terminal output.

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

void	SetInitialSpacing (double spacing)
	Set initial spacing.

void	SetKernelLength (double length)
	Set SPH kernel length.

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

void	SetBoundaries (const ChVector3d &cMin, const ChVector3d &cMax)
	Set periodic boundary condition for fluid.

void	SetActiveDomain (const ChVector3d &boxHalfDim)
	Set half-dimensions of the active domain. 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	SetInitPressure (const double fzDim)
	Set prescribed initial pressure for gravity field.

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

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

void	SetStepSize (double dT, double dT_Flex=0)
	Set FSI integration step size.

void	SetMaxStepSize (double dT_max)
	Set the maximum allowable integration step size.

void	SetAdaptiveTimeStepping (bool adaptive)
	Enable/disable adaptive time stepping.

void	SetSPHintegration (bool runSPH)
	Enable/disable SPH integration.

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. / TODO: OBSOLETE.

void	SetSPHMethod (SPHMethod SPH_method)
	Set the SPH method and, optionally, the linear solver type. / TODO: OBSOLETE.

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	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	SetOutputLength (int OutputLength)
	Set simulation data output length.

void	SetParticleOutputMode (OutputMode mode)
	Set the FSI system output mode (default: NONE).

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
	Set the fluid container dimension.

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...

double	GetStepSize () const
	Return the FSI integration step size.

double	GetMaxStepSize () const
	Return the current value of the maximum allowable integration step size.

bool	GetAdaptiveTimeStepping () const
	Return a flag inicating whether adaptive time stepping is enabled.

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

const SimParams &	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.

double	GetSimTime () const
	Get current simulation time.

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

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

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

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

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

const ChVector3d &	GetFsiBodyForce (size_t i) const
	Return the FSI applied force on the body with specified index (as returned by AddFsiBody). More...

const ChVector3d &	GetFsiBodyTorque (size_t i) const
	Return the FSI applied torque on the body with specified index (as returned by AddFsiBody). More...

void	Initialize ()
	Complete construction of the FSI system (fluid and BDE objects). More...

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

void	PrintParticleToFile (const std::string &dir) const
	Save the SPH particle information into files. More...

void	PrintFsiInfoToFile (const std::string &dir, double time) const
	Save the FSI information into files. More...

void	AddSPHParticle (const ChVector3d &point, double rho0, double pres0, double mu0, const ChVector3d &velocity=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 &point, const ChVector3d &velocity=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...

size_t	AddFsiBody (std::shared_ptr< ChBody > body)
	Add a rigid body to the FSI system. More...

void	AddWallBCE (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 capped=true, bool polar=true)
	Add BCE markers for a cylinder 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	AddConeBCE (std::shared_ptr< ChBody > body, const ChFrame<> &frame, double radius, double height, bool solid, bool capped=true, bool polar=true)
	Add BCE markers for a cone of specified radius 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...

void	AddFsiMesh (std::shared_ptr< fea::ChMesh > mesh)
	Add an FEA mesh to the FSI system. More...

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

thrust::device_vector< Real4 >	GetParticlePositions (const thrust::device_vector< int > &indices)
	Extract positions of all SPH particles with indices in the provided array. More...

thrust::device_vector< Real3 >	GetParticleVelocities (const thrust::device_vector< int > &indices)
	Extract velocities of all SPH particles with indices in the provided array. More...

thrust::device_vector< Real4 >	GetParticleForces (const thrust::device_vector< int > &indices)
	Extract forces applied to all SPH particles with indices in the provided array. More...

thrust::device_vector< Real4 >	GetParticleAccelerations (const thrust::device_vector< int > &indices)
	Extract accelerations of all SPH particles with indices in the provided array. More...

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

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

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

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

PhysicsProblem	GetPhysicsProblem () const

std::string	GetPhysicsProblemString () const

std::string	GetSphMethodTypeString () const

Static Public Member Functions
static void	CreateCylinderAnnulusPoints (double rad_inner, double rad_outer, double height, bool polar, double delta, std::vector< ChVector3d > &points)
	Utility function to create points inside a cylindrical annulus of specified radii and height. More...

static void	CreateMeshPoints (ChTriangleMeshConnected &mesh, double delta, std::vector< ChVector3d > &points)
	Utility function for creating points filling a closed mesh. More...

Friends
class	ChFsiVisualizationGL

class	ChFsiVisualizationVSG

Member Enumeration Documentation

◆ OutputMode

enum chrono::fsi::ChSystemFsi::OutputMode

strong

Output mode.

Enumerator
CSV	comma-separated value
CHPF	binary
NONE	none

Member Function Documentation

◆ AddBoxBCE()

size_t chrono::fsi::ChSystemFsi::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::ChSystemFsi::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::ChSystemFsi::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::ChSystemFsi::AddConeBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		double	radius,
		double	height,
		bool	solid,
		bool	capped = `true`,
		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::ChSystemFsi::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::ChSystemFsi::AddCylinderBCE	(	std::shared_ptr< ChBody >	body,
		const ChFrame<> &	frame,
		double	radius,
		double	height,
		bool	solid,
		bool	capped = `true`,
		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.

◆ AddFsiBody()

size_t chrono::fsi::ChSystemFsi::AddFsiBody ( std::shared_ptr< ChBody > body )

Add a rigid body to the FSI system.

Returns the index of the FSI body in the internal list.

◆ AddFsiMesh()

void chrono::fsi::ChSystemFsi::AddFsiMesh ( std::shared_ptr< fea::ChMesh > mesh )

Add an FEA mesh to the FSI system.

Contact surfaces (of type segment_set or tri_mesh) already defined for the FEA mesh are used to generate the BCE markers for the flexible solid. If none are defined, one contact surface of each type is created (as needed) for the purpose of creating the BCE markers, but these are not attached to the given FEA mesh.

◆ AddPointsBCE()

size_t chrono::fsi::ChSystemFsi::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::ChSystemFsi::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.

◆ AddWallBCE()

void chrono::fsi::ChSystemFsi::AddWallBCE	(	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.

◆ CreateBCE_box()

void chrono::fsi::ChSystemFsi::CreateBCE_box	(	const ChVector3d &	size,
		bool	solid,
		std::vector< ChVector3d > &	bce
	)

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

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.

◆ CreateBCE_cone()

void chrono::fsi::ChSystemFsi::CreateBCE_cone	(	double	rad,
		double	height,
		bool	solid,
		bool	capped,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

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

The cone is assumed centered at the origin and aligned with the Z axis. The end-cap is created if capped = true, otherwise the cone is open. 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 (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_cylinder()

void chrono::fsi::ChSystemFsi::CreateBCE_cylinder	(	double	rad,
		double	height,
		bool	solid,
		bool	capped,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

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

The cylinder is assumed centered at the origin and aligned with the Z axis. The end-caps are created if capped = true, otherwise the cylinder is open. 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 (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_sphere()

void chrono::fsi::ChSystemFsi::CreateBCE_sphere	(	double	rad,
		bool	solid,
		bool	polar,
		std::vector< ChVector3d > &	bce
	)

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

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 (polar=true), or else on a uniform Cartesian grid.

◆ CreateBCE_wall()

void chrono::fsi::ChSystemFsi::CreateBCE_wall	(	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.

◆ CreateCylinderAnnulusPoints()

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

static

Utility function to create points inside a cylindrical annulus of specified radii and height.

The cylinder annulus is assumed centered at the origin and aligned with the Z axis. If polar = true, points are created in cylindrical coordinates; otherwise points are created on a uniform Cartesian grid.

◆ CreateMeshPoints()

void chrono::fsi::ChSystemFsi::CreateMeshPoints	(	ChTriangleMeshConnected &	mesh,
		double	delta,
		std::vector< ChVector3d > &	points
	)

static

Utility function for creating points filling a closed mesh.

Calculate uu parameter and test bound

ray intersection

◆ DoStepDynamics_FSI()

void chrono::fsi::ChSystemFsi::DoStepDynamics_FSI ( )

Function to integrate the FSI system in time.

It uses a Runge-Kutta 2nd order algorithm to update both the fluid and multibody system dynamics. The midpoint data of MBS is needed for fluid dynamics update.

◆ FindParticlesInBox()

thrust::device_vector< int > chrono::fsi::ChSystemFsi::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. The return value is a device thrust vector.

◆ GetBodyForce()

ChVector3d chrono::fsi::ChSystemFsi::GetBodyForce ( ) const

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

TODO: RENAME

◆ GetFsiBodyForce()

const ChVector3d & chrono::fsi::ChSystemFsi::GetFsiBodyForce ( size_t i ) const

Return the FSI applied force on the body with specified index (as returned by AddFsiBody).

The force is applied at the body COM and is expressed in the absolute frame.

◆ GetFsiBodyTorque()

const ChVector3d & chrono::fsi::ChSystemFsi::GetFsiBodyTorque ( size_t i ) const

Return the FSI applied torque on the body with specified index (as returned by AddFsiBody).

The torque is expressed in the absolute frame.

◆ GetParticleAccelerations()

thrust::device_vector< Real4 > chrono::fsi::ChSystemFsi::GetParticleAccelerations ( const thrust::device_vector< int > & indices )

Extract accelerations of all SPH particles with indices in the provided array.

The return value is a device thrust vector.

◆ GetParticleFluidProperties()

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

Return the SPH particle fluid properties.

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

◆ GetParticleForces()

thrust::device_vector< Real4 > chrono::fsi::ChSystemFsi::GetParticleForces ( const thrust::device_vector< int > & indices )

Extract forces applied to all SPH particles with indices in the provided array.

The return value is a device thrust vector.

◆ GetParticlePositions()

thrust::device_vector< Real4 > chrono::fsi::ChSystemFsi::GetParticlePositions ( const thrust::device_vector< int > & indices )

Extract positions of all SPH particles with indices in the provided array.

The return value is a device thrust vector.

◆ GetParticleVelocities()

thrust::device_vector< Real3 > chrono::fsi::ChSystemFsi::GetParticleVelocities ( const thrust::device_vector< int > & indices )

Extract velocities of all SPH particles with indices in the provided array.

The return value is a device thrust vector.

◆ Initialize()

void chrono::fsi::ChSystemFsi::Initialize ( )

Complete construction of the FSI system (fluid and BDE objects).

Use parameters read from JSON file and/or specified through various Set functions.

◆ PrintFsiInfoToFile()

void chrono::fsi::ChSystemFsi::PrintFsiInfoToFile	(	const std::string &	dir,
		double	time
	)		const

Save the FSI information into files.

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

◆ PrintParticleToFile()

void chrono::fsi::ChSystemFsi::PrintParticleToFile ( const std::string & dir ) const

Save the SPH particle information into files.

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

◆ SetActiveDomain()

void chrono::fsi::ChSystemFsi::SetActiveDomain ( const ChVector3d & boxHalfDim )

Set half-dimensions of the active domain.

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 actual (CFD) simulations, but rather oinly when Chrono::FSI is used for continuum representation of granular dynamics (in terramechanics).

◆ SetActiveDomainDelay()

void chrono::fsi::ChSystemFsi::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::ChSystemFsi::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::ChSystemFsi::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::ChSystemFsi::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.

◆ SetElasticSPH()

void chrono::fsi::ChSystemFsi::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.

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

/builds/uwsbel/chrono/src/chrono_fsi/ChSystemFsi.h
/builds/uwsbel/chrono/src/chrono_fsi/ChSystemFsi.cpp

Description

Classes

Public Types

Public Member Functions

Static Public Member Functions

Friends

Member Enumeration Documentation

◆ OutputMode

Member Function Documentation

◆ AddBoxBCE()

◆ AddBoxContainerBCE()

◆ AddBoxSPH()

◆ AddConeBCE()

◆ AddCylinderAnnulusBCE()

◆ AddCylinderBCE()

◆ AddFsiBody()

◆ AddFsiMesh()

◆ AddPointsBCE()

◆ AddSphereBCE()

◆ AddWallBCE()

◆ CreateBCE_box()

◆ CreateBCE_cone()

◆ CreateBCE_cylinder()

◆ CreateBCE_sphere()

◆ CreateBCE_wall()

◆ CreateCylinderAnnulusPoints()

◆ CreateMeshPoints()

◆ DoStepDynamics_FSI()

◆ FindParticlesInBox()

◆ GetBodyForce()

◆ GetFsiBodyForce()

◆ GetFsiBodyTorque()

◆ GetParticleAccelerations()

◆ GetParticleFluidProperties()

◆ GetParticleForces()

◆ GetParticlePositions()

◆ GetParticleVelocities()

◆ Initialize()

◆ PrintFsiInfoToFile()

◆ PrintParticleToFile()

◆ SetActiveDomain()

◆ SetActiveDomainDelay()

◆ SetBcePattern1D()

◆ SetBcePattern2D()

◆ SetBodyForce()

◆ SetElasticSPH()