Description

Class to represent the fluid/granular dynamics system.

This class is used to represent a fluid/granular system and take care of the time integration of the fluid/granular dynamics. This is a class designed for base SPH simulation. The class holds pointer to data, which is hold somewhere else. It also include a forceSystem, which takes care of the computation of force between particles. The forceSystem is owned by the class ChFsiForce.

Inheritance diagram for chrono::fsi::ChFluidDynamics:

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Collaboration diagram for chrono::fsi::ChFluidDynamics:

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Public Member Functions
	ChFluidDynamics (std::shared_ptr< ChBce > otherBceWorker, ChSystemFsi_impl &otherFsiSystem, std::shared_ptr< SimParams > otherParamsH, std::shared_ptr< ChCounters > otherNumObjects, TimeIntegrator otherIntegrator, bool verb)
	Constructor of the fluid/granular dynamics class. More...

	~ChFluidDynamics ()
	Destructor of the fluid/granular dynamics class.

void	IntegrateSPH (std::shared_ptr< SphMarkerDataD > sphMarkersD2, std::shared_ptr< SphMarkerDataD > sphMarkersD1, std::shared_ptr< FsiBodiesDataD > fsiBodiesD, std::shared_ptr< FsiMeshDataD > fsiMeshD, Real dT, Real Time)
	Integrate the fluid/granular system in time. More...

void	DensityReinitialization ()
	Function to Shepard Filtering. More...

void	Initialize ()
	Synchronize the copy of the data between device (GPU) and host (CPU). More...

TimeIntegrator	GetIntegratorType ()
	Return the integrator type used in the simulation.

std::shared_ptr< ChFsiForce >	GetForceSystem ()
	Return the ChFsiForce type used in the simulation.

Public Member Functions inherited from chrono::fsi::ChFsiGeneral
	ChFsiGeneral (std::shared_ptr< SimParams > hostParams, std::shared_ptr< ChCounters > hostNumObjects)
	Constructor for the ChFsiGeneral class. More...

virtual	~ChFsiGeneral ()
	Destructor of the ChFsiGeneral class.

void	computeGridSize (uint n, uint blockSize, uint &numBlocks, uint &numThreads)
	Compute number of blocks and threads for calculation on GPU. More...

Protected Member Functions
void	UpdateActivity (std::shared_ptr< SphMarkerDataD > sphMarkersD1, std::shared_ptr< SphMarkerDataD > sphMarkersD2, std::shared_ptr< FsiBodiesDataD > fsiBodiesD, std::shared_ptr< FsiMeshDataD > fsiMeshD, Real Time)
	Update activity of SPH particles. More...

void	UpdateFluid (std::shared_ptr< SphMarkerDataD > sphMarkersD, Real dT)
	Update SPH particles data. More...

void	UpdateFluid_Implicit (std::shared_ptr< SphMarkerDataD > sphMarkersD)
	Update SPH particles data. More...

void	ApplyBoundarySPH_Markers (std::shared_ptr< SphMarkerDataD > sphMarkersD)
	The function applies periodic boundary to the normal SPH particles.

void	ApplyModifiedBoundarySPH_Markers (std::shared_ptr< SphMarkerDataD > sphMarkersD)
	The function modify the velocity of BCE particles.

Protected Member Functions inherited from chrono::fsi::ChFsiGeneral
uint	iDivUp (uint a, uint b)
	Return a/b or a/b + 1.

Protected Attributes
ChSystemFsi_impl &	fsiSystem
	FSI data; values are maintained externally.

std::shared_ptr< SimParams >	paramsH
	FSI parameters; values are mainained externally.

std::shared_ptr< ChCounters >	numObjectsH
	counters (fluid particles, number of rigids, boundaries)

std::shared_ptr< ChFsiForce >	forceSystem
	Force system object; calculates the force between particles.

TimeIntegrator	integrator_type
	Integrator type.

bool	verbose

Constructor & Destructor Documentation

◆ ChFluidDynamics()

chrono::fsi::ChFluidDynamics::ChFluidDynamics	(	std::shared_ptr< ChBce >	otherBceWorker,
		ChSystemFsi_impl &	otherFsiSystem,
		std::shared_ptr< SimParams >	otherParamsH,
		std::shared_ptr< ChCounters >	otherNumObjects,
		TimeIntegrator	otherIntegrator,
		bool	verb
	)

Constructor of the fluid/granular dynamics class.

Instantiate ChFsiForce, i.e. force system;
Copy the pointer to SPH particle data, parameters, and number of objects to member variables.

Parameters

otherBceWorker	Pointer to the information of BCE particles
otherFsiSystem	Pointer to the FSI system
otherParamsH	Pointer to the simulation parameters
otherNumObjects	Pointer to the number of objects
otherIntegrator	Integration type (only for ISPH)
verb	verbose terminal output

Member Function Documentation

◆ DensityReinitialization()

void chrono::fsi::ChFluidDynamics::DensityReinitialization ( )

Function to Shepard Filtering.

It calculates the densities directly, not based on the derivative of the density. This function is used in addition to the density update in UpdateFluid.

◆ Initialize()

void chrono::fsi::ChFluidDynamics::Initialize ( )

Synchronize the copy of the data between device (GPU) and host (CPU).

Including the parameters and number of objects. This function needs to be called once the host data are modified.

◆ IntegrateSPH()

void chrono::fsi::ChFluidDynamics::IntegrateSPH	(	std::shared_ptr< SphMarkerDataD >	sphMarkersD2,
		std::shared_ptr< SphMarkerDataD >	sphMarkersD1,
		std::shared_ptr< FsiBodiesDataD >	fsiBodiesD,
		std::shared_ptr< FsiMeshDataD >	fsiMeshD,
		Real	dT,
		Real	Time
	)

Integrate the fluid/granular system in time.

The underlying SPH method implementation goes inside this function. In a explicit scheme, to perform the integration, the force system calculates the forces between the particles. Then the forces are used to to update the particles position, velocity, and density in time, the latter is used to update the pressure from an equation of state. In the implicit scheme, the pressures are updated instead of density.

Parameters

sphMarkersD2	Pointer SPH particle information at the second half step
sphMarkersD1	Pointer SPH particle information at the first half step
fsiBodiesD	Pointer information of rigid bodies
fsiMeshD	Pointer information of flexible mesh
dT	Simulation stepsize
Time	Simulation time

◆ UpdateActivity()

void chrono::fsi::ChFluidDynamics::UpdateActivity	(	std::shared_ptr< SphMarkerDataD >	sphMarkersD1,
		std::shared_ptr< SphMarkerDataD >	sphMarkersD2,
		std::shared_ptr< FsiBodiesDataD >	fsiBodiesD,
		std::shared_ptr< FsiMeshDataD >	fsiMeshD,
		Real	Time
	)

protected

Update activity of SPH particles.

SPH particles which are in an active domain are set as active particles. For example, particles close to a rigid body.

◆ UpdateFluid()

void chrono::fsi::ChFluidDynamics::UpdateFluid	(	std::shared_ptr< SphMarkerDataD >	sphMarkersD,
		Real	dT
	)

protected

Update SPH particles data.

In an explicit formulation, the function relies on the explicit integration scheme.

◆ UpdateFluid_Implicit()

void chrono::fsi::ChFluidDynamics::UpdateFluid_Implicit ( std::shared_ptr< SphMarkerDataD > sphMarkersD )

protected

Update SPH particles data.

In an implicit formulation, the function relies on the implicit integration scheme.

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

/builds/uwsbel/chrono/src/chrono_fsi/physics/ChFluidDynamics.cuh

Description

Public Member Functions

Protected Member Functions

Protected Attributes

Constructor & Destructor Documentation

◆ ChFluidDynamics()

Member Function Documentation

◆ DensityReinitialization()

◆ Initialize()

◆ IntegrateSPH()

◆ UpdateActivity()

◆ UpdateFluid()

◆ UpdateFluid_Implicit()