wntr.sim.core module

class wntr.sim.core.WaterNetworkSimulator(wn=None)[source]

Bases: object

Base water network simulator class.

wnWaterNetworkModel object

Water network model

Warning

The mode parameter has been deprecated. Please set the mode using the network option, wn.options.hydraulic.demand_model.

class wntr.sim.core.WNTRSimulator(wn)[source]

Bases: WaterNetworkSimulator

WNTR simulator class. The WNTR simulator uses a custom newton solver and linear solvers from scipy.sparse.

Parameters

wn (WaterNetworkModel object) – Water network model

Note

The mode parameter has been deprecated. Please set the mode using Options.hydraulic.demand_model

run_sim(solver=<class 'wntr.sim.solvers.NewtonSolver'>, backup_solver=None, solver_options=None, backup_solver_options=None, convergence_error=False, HW_approx='default', diagnostics=False)[source]

Run an extended period simulation (hydraulics only).

Parameters

  • solver (object) – wntr.sim.solvers.NewtonSolver or Scipy solver

  • backup_solver (object) – wntr.sim.solvers.NewtonSolver or Scipy solver

  • solver_options (dict) –

    Solver options are specified using the following dictionary keys:

    • MAXITER: the maximum number of iterations for each hydraulic solve (each timestep and trial) (default = 3000)

    • TOL: tolerance for the hydraulic equations (default = 1e-6)

    • BT_RHO: the fraction by which the step length is reduced at each iteration of the line search (default = 0.5)

    • BT_MAXITER: the maximum number of iterations for each line search (default = 100)

    • BACKTRACKING: whether or not to use a line search (default = True)

    • BT_START_ITER: the newton iteration at which a line search should start being used (default = 2)

    • THREADS: the number of threads to use in constraint and jacobian computations

  • backup_solver_options (dict) –

  • convergence_error (bool (optional)) – If convergence_error is True, an error will be raised if the simulation does not converge. If convergence_error is False, partial results are returned, a warning will be issued, and results.error_code will be set to 0 if the simulation does not converge. Default = False.

  • HW_approx (str) – Specifies which Hazen-Williams headloss approximation to use. Options are ‘default’ and ‘piecewise’. Please see the WNTR documentation on hydraulics for details.

  • diagnostics (bool) – If True, then run with diagnostics on