|
cuIBM
A GPU-based Immersed Boundary Method code
|
Solves unsteady diffusion equation with an immersed boundary using the direct forcing method. More...
#include <DiffusionSolver.h>
Public Member Functions | |
| DiffusionSolver (parameterDB *pDB=NULL, domain *dInfo=NULL) | |
| Constructor. Copies the simulation parameters and the domain info. More... | |
| virtual void | initialise () |
| Sets the coefficients of the convection term to zero. This is done because we are solving a pure diffusion problem. More... | |
| virtual std::string | name () |
| Return name of solver. More... | |
 Public Member Functions inherited from DirectForcingSolver< memoryType > | |
| DirectForcingSolver (parameterDB *pDB=NULL, domain *dInfo=NULL) | |
| Constructor. Initializes the simulation parameters and the domain info. More... | |
| virtual void | writeData () |
| Writes the velocity, pressure, force and mass flux data at every save point. More... | |
| Public Member Functions inherited from NSWithBody< memoryType > | |
| virtual void | writeCommon () |
| Writes flow variables and position of body points into files. More... | |
| virtual void | shutDown () |
| Closes iteration file and force file. More... | |
| Public Member Functions inherited from NavierStokesSolver< memoryType > | |
| NavierStokesSolver (parameterDB *pDB=NULL, domain *dInfo=NULL) | |
| Constructor. Copies the database and information about the computational grid. More... | |
| void | stepTime () |
| Calculates the variables at the next time step. More... | |
| bool | finished () |
| Evaluates the condition required to stop the simulation. More... | |
Private Member Functions | |
| virtual void | solvePoisson () |
| Does nothing. More... | |
| virtual void | projectionStep () |
| The velocity at the next time step is the same as the intermediate velocity. More... | |
Additional Inherited Members | |
| Protected Member Functions inherited from DirectForcingSolver< memoryType > | |
| void | tagPoints () |
| void | tagPoints (real *bx, real *by, real *uB, real *vB) |
| Tags all the forcing nodes required for the type of linear interpolation explained in the paper by Fadlun et al. (2000). More... | |
| virtual void | generateA (real alpha) |
| virtual void | generateL () |
| void | generateQT (int *QTRows, int *QTCols, real *QTVals) |
| virtual void | generateQT () |
| Compute the divergence operator (transpose of the gradient one). More... | |
| void | updateQ () |
| virtual void | generateC () |
| Generates the right-hand side matrix in the Poisson step. More... | |
| virtual void | assembleRHS1 () |
| Assembles the matrix rhs1 for DirectForcingSolver. More... | |
| void | updateRHS1 () |
| virtual void | updateSolverState () |
| Updates the matrices every time the body is moved. More... | |
| void | writeMassFluxInfo () |
| Prints the min, max and sum of the divergences of the velocity field in every cell of the domain. More... | |
| template<> | |
| void | generateA (real alpha) |
| Generates the matrix A on the device. More... | |
| template<> | |
| void | generateL () |
| Sets up the Laplacian matrix for the implicit diffusion term. Uses second order central differences on the non-uniform grid. More... | |
| template<> | |
| void | updateQ () |
| Update the gradient operator (device). More... | |
| template<> | |
| void | tagPoints () |
| Tags the forcing nodes among the velocity nodes, i.e. the nodes at which the velocity interpolation is performed. More... | |
| template<> | |
| void | updateRHS1 () |
| Update the RHS of the velocity system. More... | |
| Protected Member Functions inherited from NSWithBody< memoryType > | |
| virtual void | calculateForce () |
| void | initialiseBodies () |
| Stores the parameters of the simulation and initializes the location and motion of each immersed bodies. More... | |
| void | updateBodies () |
| Updates location and motion of each immersed body at current time. More... | |
| template<> | |
| void | calculateForce () |
| Calculates forces acting on an immersed body. More... | |
| Protected Member Functions inherited from NavierStokesSolver< memoryType > | |
| void | initialiseCommon () |
| Initializes parameters common to all Navier-Stokes solvers. More... | |
| void | initialiseArrays (int numQ, int numLambda) |
| Initializes all arrays required to solve the Navier-Stokes equations. More... | |
| virtual void | initialiseFluxes () |
| virtual void | initialiseFluxes (real *q) |
| Initializes velocity flux vectors. More... | |
| void | initialiseBoundaryArrays () |
| Initializes boundary velocity arrays with values stored in the database. More... | |
| void | assembleMatrices () |
| Assembles matrices of the intermediate flux solver and the Poisson solver. More... | |
| void | generateM () |
| void | generateBN () |
| Generates approximate inverse of the matrix resulting from implicit velocity terms. More... | |
| void | updateQ (real gamma) |
| Doing nothing. More... | |
| void | generateRN () |
| Generates explicit terms of the momentum equation. More... | |
| void | calculateExplicitQTerms () |
| virtual void | calculateExplicitLambdaTerms () |
| Doing nothing. Used in methods that use the explicit pressure term in the intermediate velocity solve step, such as FadlunEtAlSolver and DFModifiedSolver. More... | |
| virtual void | generateBC1 () |
| virtual void | generateBC2 () |
| void | assembleRHS2 () |
| Assembles the right hand-side of the Poisson system. More... | |
| virtual void | solveIntermediateVelocity () |
| Solves for the intermediate flux velocity. More... | |
| void | updateBoundaryConditions () |
| Doing nothing. More... | |
| template<> | |
| void | generateA (real alpha) |
| Assembles the matrix from implicit terms of momentum equation. More... | |
| template<> | |
| void | generateBC1 () |
| Generates inhomogeneous boundary conditions from the discrete Laplacian operator. More... | |
| template<> | |
| void | generateBC2 () |
| Generates inhomogeneous boundary conditions from the discrete continuity equation. More... | |
| template<> | |
| void | generateL () |
| Generates the discrete Laplacian matrix. More... | |
| template<> | |
| void | generateM () |
| Generates the mass matrix and its inverse. More... | |
| template<> | |
| void | generateQT () |
| Generates the discrete divergence matrix. More... | |
| template<> | |
| void | calculateExplicitQTerms () |
| Generates explicit terms that arise from the velocity fluxes. More... | |
| template<> | |
| void | initialiseFluxes () |
| Initializes velocity flux vectors (on the device). More... | |
| template<> | |
| void | generateC () |
| Generates the matrix of the Poisson solver. More... | |
| Protected Attributes inherited from DirectForcingSolver< memoryType > | |
| cusp::array1d< int, host_memory > | tags |
| vector used to differentiate forcing points from regular ones (host) More... | |
| cusp::array1d< int, host_memory > | tags2 |
| vector used to differentiate forcing points from regular ones (host) More... | |
| cusp::array1d< int, device_memory > | tagsD |
| vector used to differentiate forcing points from regular ones (device) More... | |
| cusp::array1d< int, device_memory > | tags2D |
| vector used to differentiate forcing points from regular ones (device) More... | |
| vecH | coeffs |
| coefficients of interpolation (host) More... | |
| vecH | coeffs2 |
| other coefficients of interpolation; quadratic interpolation (host) More... | |
| vecD | coeffsD |
| coefficients of interpolation (device) More... | |
| vecD | coeffs2D |
| other coefficients of interpolation; quadratic interpolation (device) More... | |
| vecH | uv |
| velocity field (host) More... | |
| vecD | uvD |
| velocity field (device) More... | |
| cusp::array1d< real, memoryType > | pressure |
| pressure field More... | |
| Protected Attributes inherited from NSWithBody< memoryType > | |
| bodies< memoryType > | B |
| bodies in the flow More... | |
| real | forceX |
| force acting on each body in the x-direction More... | |
| real | forceY |
| force acting on each body in the y-direction More... | |
| std::ofstream | forceFile |
| file to write the forces More... | |
| Protected Attributes inherited from NavierStokesSolver< memoryType > | |
| parameterDB * | paramDB |
| database that contains all the simulation parameters More... | |
| domain * | domInfo |
| computational grid information More... | |
| integrationScheme | intgSchm |
instance of the class integrationScheme More... | |
| real | QCoeff |
| cusp::coo_matrix< int, real, memoryType > | M |
| diagonal mass matrix More... | |
| cusp::coo_matrix< int, real, memoryType > | Minv |
| inverse of the mass matrix More... | |
| cusp::coo_matrix< int, real, memoryType > | L |
| discrete Laplacian matrix More... | |
| cusp::coo_matrix< int, real, memoryType > | A |
| combination of mass and Laplacian matrices More... | |
| cusp::coo_matrix< int, real, memoryType > | Q |
| gradient matrix (and regularization matrix if immersed body) More... | |
| cusp::coo_matrix< int, real, memoryType > | QT |
| transposed gradient matrix (and interpolation matrix if immersed body) More... | |
| cusp::coo_matrix< int, real, memoryType > | BN |
N-th order Taylor series expansion of the inverse of A. More... | |
| cusp::coo_matrix< int, real, memoryType > | C |
| matrix of the Poisson system More... | |
| cusp::array1d< real, memoryType > | q |
| velocity flux vector More... | |
| cusp::array1d< real, memoryType > | qStar |
| intermediate velocity flux vector More... | |
| cusp::array1d< real, memoryType > | qOld |
| velocity flux vector at the previous time-step More... | |
| cusp::array1d< real, memoryType > | lambda |
| pressure vector (and body forces if immersed body) More... | |
| cusp::array1d< real, memoryType > | rn |
| explicit terms of the momentum equation More... | |
| cusp::array1d< real, memoryType > | bc1 |
| inhomogeneous boundary conditions from the discrete Laplacian operator More... | |
| cusp::array1d< real, memoryType > | bc2 |
| inhomogeneous boundary conditions from the discrete continuity equation More... | |
| cusp::array1d< real, memoryType > | rhs1 |
| right hand-side of the system for the intermediate velocity flux vector More... | |
| cusp::array1d< real, memoryType > | rhs2 |
| right hand-side of the Poisson system More... | |
| cusp::array1d< real, memoryType > | H |
| hold convective terms from previous time step More... | |
| cusp::array1d< real, memoryType > | temp1 |
| temporary 1D Cusp array More... | |
| cusp::array1d< real, memoryType > | temp2 |
| temporary 1D Cusp array More... | |
| cusp::array1d< real, memoryType > | bc [4] |
| array that contains the boundary conditions of the rectangular domain More... | |
| preconditioner< cusp::coo_matrix< int, real, memoryType > > * | PC1 |
| preconditioner for the intermediate flux solver More... | |
| preconditioner< cusp::coo_matrix< int, real, memoryType > > * | PC2 |
| preconditioner for the Poisson solver More... | |
| size_t | timeStep |
| iteration number More... | |
| size_t | subStep |
| number of sub-iterations More... | |
| size_t | iterationCount1 |
| number of iteration to solve the intermediate fluxes More... | |
| size_t | iterationCount2 |
| number of iteration to solve the Poisson equation More... | |
| Logger | logger |
instance of the class Logger to track time of different tasks More... | |
| std::ofstream | iterationsFile |
| file that contains the number of iterations More... | |
Solves unsteady diffusion equation with an immersed boundary using the direct forcing method.
Inherits from the class DirectForcingSolver. Sets the convection term to zero, and does not solve any Poisson equation. The intermediate velocity is the same as the velocity at the next time step. Each component of velocity is solved independently, and do not influence each other. To solve the heat equation for only one variable, set boundary conditions and look at the solution only for one component of velocity.
Definition at line 25 of file DiffusionSolver.h.
| DiffusionSolver< memoryType >::DiffusionSolver | ( | parameterDB * | pDB = NULL, |
| domain * | dInfo = NULL |
||
| ) |
Constructor. Copies the simulation parameters and the domain info.
Definition at line 16 of file DiffusionSolver.cu.
|
virtual |
Sets the coefficients of the convection term to zero. This is done because we are solving a pure diffusion problem.
Reimplemented from DirectForcingSolver< memoryType >.
Definition at line 28 of file DiffusionSolver.cu.
References DirectForcingSolver< memoryType >::initialise().
|
inlinevirtual |
Return name of solver.
Reimplemented from DirectForcingSolver< memoryType >.
Definition at line 44 of file DiffusionSolver.h.
|
privatevirtual |
The velocity at the next time step is the same as the intermediate velocity.
Reimplemented from DirectForcingSolver< memoryType >.
Definition at line 55 of file DiffusionSolver.cu.
|
privatevirtual |
Does nothing.
No Poisson equation needs to be solved for the unsteady diffusion problem.
Reimplemented from NavierStokesSolver< memoryType >.
Definition at line 46 of file DiffusionSolver.cu.
1.8.11
