Source.MassFlowRate.Gas

Source

This process sources a reference mass flow rate of gas for calibrating gas-flow meters. The instantaneous mass flow rate q_m equals dm/dt, sometimes estimated as ∆m/∆t using the total mass ∆m flowing through a defined surface in time ∆t.

Result

Name	Quantity	m-layer aspect
MassFlowRate	flow-mass	mass-flow-rate (AS134)

Parameters

Parameter	Required	Quantity	m-layer aspect	Definition or allowed values
MassFlowRate	Required	flow-mass	mass-flow-rate (AS134)	Mass of a substance passing through a specific cross-sectional area
Temperature	Optional	temperature	thermodynamic-temperature (AS101)	Temperature of the gas used during the measurement
Pressure	Optional	pressure:absolute	pressure (AS14)	Pressure of the gas used during the measurement
RelativeHumidity	Optional	relative-humidity	relative-humidity (AS110)	Relative humidity (water content) of the gas used during measurement, mostly applicable to ambient air as the medium
Compressibility	Optional	—	null (AS1)	Relative volume change as a result of a pressure change of the gas used
ReferenceTemperature	Optional	temperature	thermodynamic-temperature (AS101)	Reference temperature condition to or from which to correct the flow rate
ReferencePressure	Optional	pressure:absolute	pressure (AS14)	Reference pressure condition to or from which to correct the flow rate
ReferenceRelativeHumidity	Optional	relative-humidity	relative-humidity (AS110)	Reference Relative Humidity: condition to or from which to correct the flow rate
ReferenceCompressibility	Optional	—	null (AS1)	Relative volume change as a result of a pressure change for the reference gas
AmbientTemperature	Optional	temperature	thermodynamic-temperature (AS101)	—
AmbientPressure	Optional	pressure:absolute	pressure (AS14)	—
AmbientRelativeHumidity	Optional	relative-humidity	relative-humidity (AS110)	—
OutletPressure	Optional	pressure:absolute	pressure (AS14)	Outlet pressure ambient or otherwise
ReynoldsNumber	Optional	—	null (AS1)	Dimensionless quantity that characterizes the degree of laminar versus turbulent flow
GasVelocity	Optional	speed	speed (AS38)	speed of the gas through the measurement area
GasSpecies	Optional	—	—	Species of source gas for flow calibrations Identifiers for elements, compounds, mixtures for flow calibrations. Air · He · Ar · N2 · CO2 · CH4 · C3H8 · C4H10 · H2S · CO · H2 · Cl2
InnerDiameter	Optional	length	length (AS3)	Diameter of the pipe used in the measurement
DynamicViscosity	Optional	dynamic-viscosity	dynamic-viscosity (AS107)	Fluid internal resistance to flow

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