WOLFRAM SYSTEM MODELER

# dp_nominalPressureLossLawDensity_MFLOW

Generic pressure loss | calculate mass flow rate | nominal operation point | pressure loss law (coefficient and exponent) | density dependence # Wolfram Language

In:= `SystemModel["Modelica.Fluid.Dissipation.PressureLoss.General.dp_nominalPressureLossLawDensity_MFLOW"]`
Out:= # Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Calculation of a generic pressure loss in dependence of nominal fluid variables (e.g., nominal density) via interpolation from an operation point. This generic function considers the pressure loss law via a nominal pressure loss (dp_nom), a pressure loss coefficient (zeta_TOT) and a pressure loss law exponent (exp) as well as the influence of density on pressure loss.

Generally this function is numerically best used for the compressible case if the pressure loss (dp) is known (out of pressures as state variable) and the mass flow rate (M_FLOW) has to be calculated. On the other hand the function dp_nominalPressurelosslawDensity_DP is numerically best used for the incompressible case , where the mass flow rate (m_flow) is known (as state variable) in the used model and the corresponding pressure loss (DP) has to be calculated. See more information.

# Syntax

M_FLOW = dp_nominalPressureLossLawDensity_MFLOW(IN_con, IN_var, dp)

# Inputs (3)

IN_con Description: Input record for function dp_nominalPressureLossLawDensity_MFLOW Description: Input record for function dp_nominalPressureLossLawDensity_MFLOW Type: Pressure (Pa) Description: Pressure loss

# Outputs (1)

M_FLOW Type: MassFlowRate (kg/s) Description: Output for function dp_nominalPressurelosslawDensity_MFLOW