Cavitating Venturi

fullflow.CavitatingVenturi

Cavitating liquid venturi model.

CavitatingVenturi computes mass flow through a liquid venturi using a noncavitating restriction model or a cavitating venturi model. The active mode is selected using a critical downstream-to-upstream pressure ratio.

In cavitating mode, the throat pressure is assumed to be pinned to the vapor pressure corresponding to the upstream fluid state. If upstream temperature and critical temperature are both assigned, cavitation is disabled above the critical temperature.

Cavitation onset and stable cavitating flow are not identical. Incipient cavitation begins when the throat pressure first reaches saturation pressure, while fully established cavitating flow depends on geometry and empirical behavior.

Parameters

Name	Type	Description
name	str	Component name
network	Network	Network that owns this component
upstream_pressure	State	Upstream pressure
downstream_pressure	State	Downstream pressure
density	State	Fluid density
throat_area	float	Venturi throat area
vapor_pressure	State	Fluid vapor pressure
critical_pressure_ratio	float, optional	Pressure ratio below which cavitating mode is activated
cavitating_discharge_coefficient	float, optional	Discharge coefficient used in cavitating mode
noncavitating_discharge_coefficient	float, optional	Discharge coefficient used in noncavitating mode
upstream_temperature	State, optional	Upstream fluid temperature
critical_temperature	State, optional	Fluid critical temperature

Outputs

Name	Type	Description
mass_flow	State, optional	Computed venturi mass flow rate
is_cavitating	bool, optional	Whether cavitating mode is active