.Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.massFlowRate_dp

Information

Compute mass flow rate from constant loss factor and pressure drop (m_flow = f(dp)). For small pressure drops (dp < dp_small), the characteristic is approximated by a polynomial in order to have a finite derivative at zero mass flow rate.

Interface

function massFlowRate_dp
  extends Modelica.Icons.Function;
  input SI.Pressure dp "Pressure drop (dp = port_a.p - port_b.p)";
  input SI.Density rho_a "Density at port_a";
  input SI.Density rho_b "Density at port_b";
  input LossFactorData data "Constant loss factors for both flow directions" annotation(
    choices(choice = Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.LossFactorData.wallFriction(), choice = Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.LossFactorData.suddenExpansion(), choice = Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.LossFactorData.sharpEdgedOrifice()));
  input SI.AbsolutePressure dp_small = 1 "Turbulent flow if |dp| >= dp_small";
  output SI.MassFlowRate m_flow "Mass flow rate from port_a to port_b";
end massFlowRate_dp;