WOLFRAM SYSTEM MODELER
ReynoldsNumber_m_flowReturn Reynolds number from m_flow, mu, D, A |
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SystemModel["Modelica.Fluid.Pipes.BaseClasses.CharacteristicNumbers.ReynoldsNumber_m_flow"]

This information is part of the Modelica Standard Library maintained by the Modelica Association.
Simplified calculation of Reynolds Number for flow through pipes or orifices; using the mass flow ratem_flow instead of the velocity v to express inertial forces.
See also Pipes.BaseClasses.CharacteristicNumbers.ReynoldsNumber.Re = |m_flow|*diameter/A/μ with m_flow = v*ρ*A
| m_flow |
Type: MassFlowRate (kg/s) Description: Mass flow rate |
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| mu |
Type: DynamicViscosity (Pa⋅s) Description: Dynamic viscosity |
| D |
Type: Length (m) Description: Characteristic dimension (hydraulic diameter of pipes or orifices) |
| A |
Default Value: Modelica.Constants.pi / 4 * D * D Type: Area (m²) Description: Cross sectional area of fluid flow |
| Re |
Type: ReynoldsNumber Description: Reynolds number |
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