.Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.pressureLoss_m_flow

Information

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

Interface

function pressureLoss_m_flow
  extends Modelica.Icons.Function;
  input SI.MassFlowRate m_flow "Mass flow rate from port_a to port_b";
  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.MassFlowRate m_flow_small = 0.01 "Turbulent flow if |m_flow| >= m_flow_small";
  output SI.Pressure dp "Pressure drop (dp = port_a.p - port_b.p)";
end pressureLoss_m_flow;