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:
Collaboration diagram for chrono::fsi::ChFluidDynamics:

Public Member Functions

 ChFluidDynamics (std::shared_ptr< ChBce > otherBceWorker, std::shared_ptr< ChSystemFsi_impl > otherFsiSystem, std::shared_ptr< SimParams > otherParamsH, std::shared_ptr< NumberOfObjects > otherNumObjects, CHFSI_TIME_INTEGRATOR otherIntegrator)
 Constructor of the fluid/granular dynamics class. More...
 
 ~ChFluidDynamics ()
 Destructor of the fluid/granular dynamics class.
 
virtual 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...
 
virtual void DensityReinitialization ()
 Function to Shepard Filtering. More...
 
void Finalize ()
 Synchronize the copy of the data between device (GPU) and host (CPU). More...
 
CHFSI_TIME_INTEGRATOR GetIntegratorType ()
 Return the integrator type used in the simulation.
 
std::shared_ptr< ChFsiForceGetForceSystem ()
 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< NumberOfObjects > 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

virtual void UpdateActivity (std::shared_ptr< SphMarkerDataD > sphMarkersD1, std::shared_ptr< SphMarkerDataD > sphMarkersD2, std::shared_ptr< FsiBodiesDataD > fsiBodiesD, Real Time)
 Update activity of SPH particles. More...
 
virtual void UpdateFluid (std::shared_ptr< SphMarkerDataD > sphMarkersD, Real dT)
 Update SPH particles data. More...
 
virtual void UpdateFluid_Implicit (std::shared_ptr< SphMarkerDataD > sphMarkersD)
 Update SPH particles data. More...
 
virtual void ApplyBoundarySPH_Markers (std::shared_ptr< SphMarkerDataD > sphMarkersD)
 The function applies periodic boundary to the normal SPH particles.
 
virtual 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

std::shared_ptr< ChSystemFsi_implfsiSystem
 FSI data; values are maintained externally.
 
std::shared_ptr< SimParamsparamsH
 FSI parameters; values are mainained externally.
 
std::shared_ptr< NumberOfObjectsnumObjectsH
 Number of objects (fluid particles, number of rigids, boundaries)
 
std::shared_ptr< ChFsiForceforceSystem
 Force system object; calculates the force between particles.
 
CHFSI_TIME_INTEGRATOR integrator_type
 Integrator type.
 

Constructor & Destructor Documentation

◆ ChFluidDynamics()

chrono::fsi::ChFluidDynamics::ChFluidDynamics ( std::shared_ptr< ChBce otherBceWorker,
std::shared_ptr< ChSystemFsi_impl otherFsiSystem,
std::shared_ptr< SimParams otherParamsH,
std::shared_ptr< NumberOfObjects otherNumObjects,
CHFSI_TIME_INTEGRATOR  otherIntegrator 
)

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
otherBceWorkerPointer to the information of BCE particles
otherFsiSystemPointer to the FSI system
otherParamsHPointer to the simulation parameters
otherNumObjectsPointer to the number of objects
otherIntegratorPointer to the integration type (only for ISPH)

Member Function Documentation

◆ DensityReinitialization()

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

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.

◆ Finalize()

void chrono::fsi::ChFluidDynamics::Finalize ( )

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()

virtual 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 
)
virtual

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
sphMarkersD2Pointer SPH particle information at the second half step
sphMarkersD1Pointer SPH particle information at the first half step
fsiBodiesDPointer information of rigid bodies
fsiMeshDPointer information of flexible mesh
dTSimulation stepsize
TimeSimulation time

◆ UpdateActivity()

virtual void chrono::fsi::ChFluidDynamics::UpdateActivity ( std::shared_ptr< SphMarkerDataD sphMarkersD1,
std::shared_ptr< SphMarkerDataD sphMarkersD2,
std::shared_ptr< FsiBodiesDataD fsiBodiesD,
Real  Time 
)
protectedvirtual

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()

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

Update SPH particles data.

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

◆ UpdateFluid_Implicit()

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

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