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Old   December 22, 2014, 07:45
Exclamation Open channel (inlet problem)
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Hi ;

ı am trying to create a model with using an empty channel and an inlet (water hydrograph). Problem is that ;

- ı must create an inlet that consist of air and water ( two phases) however, water height has to be changed with time respect to mass flow.

I used "open channel" mass flow inlet and pressure outlet.

photos are below.

channel inlet cross section : 0.7 m x 0.7 m
inlet mass flow : 14 l/s
calculated water velocity (in experiment): 0.181 m/s (fluent gives me 0.026 m/s because it distributes all vel at inlet cross sec (0.7x0.7) automatically.

for inlet ;

between time =0 second, t=360 discharge=14 l/s
between t=360, t= 690 d=0.14444(x-360)+14
between t=690, t=1020 d=61.67-0.14444(x-690)
between t=1020, t=1320 d=14

Best regards.

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hydrograph, inlet, open channel, velocity, water depth

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