.Modelica.Fluid.Pipes.BaseClasses.FlowModels.NominalTurbulentPipeFlow

Information

This model defines the pressure loss assuming turbulent flow for specified dp_nominal and m_flow_nominal. It takes into account the fluid density of each flow segment and obtains appropriate pathLengths_nominal values for an inverse parameterization of the TurbulentPipeFlow model. Per default the upstream and downstream densities are averaged with the setting useUpstreamScheme = false, in order to avoid discontinuous pathLengths_nominal values in the case of flow reversal.

The geometry parameters crossAreas, diameters and roughnesses do not effect simulation results of this nominal pressure loss model. As the geometry is specified however, the optionally calculated Reynolds number as well as m_flows_turbulent and dps_fg_turbulent become meaningful and can be related to m_flow_small and dp_small.

Optional Variables if show_Res

TypeNameDescription
ReynoldsNumberRes[n] Reynolds numbers of pipe flow per flow segment
MassFlowRatem_flows_turbulent[n-1] mass flow rates at start of turbulent region for Re_turbulent=4000
AbsolutePressuredps_fg_turbulent[n-1] pressure losses due to friction and gravity corresponding to m_flows_turbulent

Revisions


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