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Karamelo
714599e9
Parallel Material Point Method Simulator
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Karamelo
714599e9
Parallel Material Point Method Simulator
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This class holds all the variables and independent functions related the background grid(s).
This class does not have as members functions related to the Particle to Grid (P2G) and Grid to Particle (G2P) steps of the MPM algorithm. This is due to the necessity to access the mass, velocity, body forces and stresses of particles held in the Solid class. Instead, these functions are members of the Solid Class since this class stores a pointer to the grid it uses. Either a local grid, as used in the Total Lagrangian MPM, or the global grid, as used in the Updated Lagrangian MPM. This class has Pointers as parent in order to be accessible from anywhere within the MPM class.
Inheritance diagram for Grid:Public Member Functions | |
| void | grow (int) |
| Allocate memory for the vectors used for local nodes or resize them. | |
| void | grow_ghosts (int) |
| Allocate memory for the vectors used for ghost nodes or resize them. | |
| void | init (double *, double *) |
| Create the array of nodes. Give them their position, tag, and type. | |
| void | reduce_ghost_nodes (bool only_v=false) |
| Reduce the force and velocities of all the ghost nodes from that computed on each CPU. If only_v is true, it reduces only the velocities. | |
| void | reduce_mass_ghost_nodes () |
| Reduce the mass of all the ghost nodes from that computed on each CPU. | |
| void | reduce_regularized_variables () |
| Reduce the pressure interpolated at the grid nodes. | |
| void | update_grid_positions () |
| Determine the new position of the grid nodes. | |
| void | update_grid_velocities () |
| Determine the temporary grid velocities \(\tilde{v}_{n}\). | |
Public Attributes | |
| double | cellsize |
| size of the square cells forming the grid | |
| map< int, vector< tagint > > | dest_nshared |
| for each CPU, list the tags of shared nodes | |
| vector< Eigen::Vector3d > | f |
| nodes' internal forces | |
| map< int, int > | map_ntag |
| map_ntag[ntag[i]] = i; | |
| vector< int > | mask |
| nodes' group mask | |
| vector< double > | mass |
| nodes' current mass | |
| vector< Eigen::Vector3d > | mb |
| nodes' external forces times the mass | |
| int | ncells |
| number of cells | |
| bigint | nnodes |
| total number of nodes in the domain | |
| bigint | nnodes_ghost |
| number of ghost nodes (in this CPU) | |
| bigint | nnodes_local |
| number of nodes (in this CPU) | |
| vector< int > | nowner |
| which CPU owns each node (universe->me for local nodes, other CPU for ghost nodes | |
| int | nshared |
| number of nodes that are shared (ghosts in other CPUs) | |
| vector< tagint > | ntag |
| unique identifier for nodes in the system. | |
| vector< array< int, 3 > > | ntype |
| node type in x, y, and z directions (False for an edge, True otherwise) | |
| int | nx |
| number of nodes along x on this CPU | |
| int | nx_global |
| number of nodes along x on all CPUs | |
| int | ny |
| number of nodes along y on this CPU | |
| int | ny_global |
| number of nodes along y on all CPUs | |
| int | nz |
| number of nodes along z on this CPU | |
| int | nz_global |
| number of nodes along z on all CPUs | |
| map< int, vector< tagint > > | origin_nshared |
| for each CPU, list the tags of ghost nodes | |
| MPI_Datatype | Pointtype |
| MPI type for struct Point. | |
| vector< bool > | rigid |
| are the nodes in the area of influence of a rigid body? | |
| vector< tagint > | shared |
| tag of all shared nodes | |
| vector< Eigen::Vector3d > | v |
| nodes' velocity at time t | |
| vector< Eigen::Vector3d > | v_update |
| nodes' velocity at time t+dt | |
| vector< Eigen::Vector3d > | x |
| nodes' current position | |
| vector< Eigen::Vector3d > | x0 |
| nodes' position in the reference coordinate system | |
1.8.13 