112 lines
3.2 KiB
Python
112 lines
3.2 KiB
Python
import tsnet
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import numpy as np
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# Open an example network and create a transient model
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inp_file = '/Users/luxing/Code/TSNet/examples/networks/Tnet1.inp'
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tm = tsnet.network.TransientModel(inp_file)
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# Set wavespeed
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tm.set_wavespeed(1200.) # m/s
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# Set time options
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dt = 0.1 # time step [s], if not given, use the maximum allowed dt
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tf = 60 # simulation period [s]
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n = 100
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tm.set_time_N(tf,n)
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# Set valve closure
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tc = 0.6 # valve closure period [s]
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ts = 0 # valve closure start time [s]
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se = 0 # end open percentage [s]
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m = 1 # closure constant [dimensionless]
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valve_op = [tc,ts,se,m]
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percent_open = np.linspace(100,0,11)
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kl = [1/0.2, 2.50, 1.25, 0.625, 0.333, 0.17,
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0.100, 0.0556, 0.0313, 0.0167, 0.0]
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curve = [(percent_open[i], kl[i]) for i in range(len(kl))]
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tm.valve_closure('VALVE', valve_op,curve)
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# Initialize steady state simulation
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t0 = 0. # initialize the simulation at 0 [s]
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engine = 'DD' # demand driven simulator
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tm = tsnet.simulation.Initializer(tm, t0, engine)
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# Transient simulation
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results_obj = 'Tnet1' # name of the object for saving simulation results
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friction = 'steady'
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tm1 = tsnet.simulation.MOCSimulator(tm, results_obj,friction)
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#%%
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tm = tsnet.network.TransientModel(inp_file)
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# Set wavespeed
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tm.set_wavespeed(1200.) # m/s
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# Set time options
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tm.set_time_N(tf,n)
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# Set valve closure
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tc = 0.6 # valve closure period [s]
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ts = 0 # valve closure start time [s]
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se = 0 # end open percentage [s]
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m = 1 # closure constant [dimensionless]
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valve_op = [tc,ts,se,m]
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tm.valve_closure('VALVE',valve_op)
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# Initialize steady state simulation
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t0 = 0. # initialize the simulation at 0 [s]
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engine = 'DD' # demand driven simulator
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tm = tsnet.simulation.Initializer(tm, t0, engine)
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# Transient simulation
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results_obj = 'Tnet1' # name of the object for saving simulation results
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friction = 'quasi-steady'
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tm2 = tsnet.simulation.MOCSimulator(tm, results_obj,friction)
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#%%
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tm = tsnet.network.TransientModel(inp_file)
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# Set wavespeed
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tm.set_wavespeed(1200.) # m/s
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# Set time options
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tm.set_time_N(tf,n)
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# Set valve closure
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tc = 0.6 # valve closure period [s]
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ts = 0 # valve closure start time [s]
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se = 0 # end open percentage [s]
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m = 1 # closure constant [dimensionless]
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valve_op = [tc,ts,se,m]
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tm.valve_closure('VALVE',valve_op)
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# Initialize steady state simulation
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t0 = 0. # initialize the simulation at 0 [s]
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engine = 'DD' # demand driven simulator
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tm = tsnet.simulation.Initializer(tm, t0, engine)
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# Transient simulation
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results_obj = 'Tnet1' # name of the object for saving simulation results
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friction = 'unsteady'
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tm3 = tsnet.simulation.MOCSimulator(tm, results_obj,friction)
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#%%
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# report results
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import matplotlib.pyplot as plt
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node = 'N2'
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head1 = tm1.get_node(node).head
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t1 = tm1.simulation_timestamps
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head2 = tm2.get_node(node).head
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t2 = tm2.simulation_timestamps
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head3 = tm3.get_node(node).head
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t3 = tm3.simulation_timestamps
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fig = plt.figure(figsize=(8,5), dpi=80, facecolor='w', edgecolor='k')
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plt.plot(t1, head1, 'k',label='steady', linewidth=2.5)
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plt.plot(t2, head2, 'b', label='quasi-steady', linewidth=2.5)
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plt.plot(t3, head3, 'r',label='unsteady', linewidth=2.5)
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plt.xlim([t1[0],t1[-1]])
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plt.xlabel("Time [s]")
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plt.ylabel("Pressure Head [m]")
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plt.legend(loc='best')
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plt.show()
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fig.savefig('tnet1_unsteady_friction.pdf', format='pdf',dpi=500)
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# %%
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