DMNetwork: Hands on

Compile ex1.c

            cd petsc/src/ksp/ksp/tutorials/network
            make ex1

Run a 1 processor example and view solution at edges and vertices
```
            mpiexec -n 1 ./ex1
          
```

Run a 1 processor example with a convergence reason

            mpiexec -n 1 ./ex1 -ksp_converged_reason

Run with 2 processors with a partitioning option

            mpiexec -n 2 ./ex1  -petscpartitioner_type simple

Example 2: AC Power Flow

This example demonstrates simulation of a nonlinear power flow in a grid network using the DMNetwork interface. Further details:

Compile power.c

            cd petsc/src/snes/tutorials/network/power
            make power

Run a 1 processor example and view solution at vertices

            mpiexec -n 1 ./power

Run with 2 processors with edge and vertex visualization

            mpiexec -n 2 ./power  -dm_view

This example demonstrates simulation of a transient water flow in a pipe network using the DMNetwork interface. Further details:

Compile pipes1.c

            cd petsc/src/ts/tutorials/network/wash
            make  pipes1

Run with 2 processors with a partitioning option

            mpiexec -n 2 ./pipes1 -ts_monitor -case 1 -ts_max_steps 1 -petscpartitioner_type
            simple -options_left no -viewX

Run with 3 processors with a different case and more time-stepping options

            mpiexec -n 3 ./pipes1  -ts_monitor -case 2 -ts_max_steps 10 -petscpartitioner_type
            simple -options_left no -viewX