32 lines
1.2 KiB
Matlab
32 lines
1.2 KiB
Matlab
function m = Valve(upstream, downstream)
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%
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% VALVE - Create a valve connecting two reactors / reservoirs.
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%
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% m = Valve(upstream, downstream)
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%
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% creates an instance of class FlowDevice configured to simulate a
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% valve that produces a flow rate proportional to the pressure
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% difference between the uupstream and downstream reactors. If two reactor
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% objects are supplied as arguments, the valve is installed
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% between the two reactors.
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%
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% The mass flow rate [kg/s] is computed from the expression
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%
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% mdot = K ( P_upstream - P_downstream )
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%
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% as long as this produces a positive value. If this expression is
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% negative, zero is returned. Therefore, the Valve object acts as a
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% check valve - flow is always from the upstream reactor to the
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% downstream one. Note: as currently implemented, the Valve object
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% does not model real valve characteristics - in particular, it
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% does not model choked flow. The mass flow rate is always assumed
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% to be linearly proportional to the mass flow rate, no matter how
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% large the pressure difference. THIS MAY CHANGE IN A FUTURE
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% RELEASE.
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%
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% see also: FlowDevice, MassFlowController
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%
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m = FlowDevice(3);
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if nargin == 2
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install(m, upstream, downstream)
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end
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