.ThermofluidStream.Processes.Internal.FlowResistance.zetaPressureLoss

Information

For specific components (armatures, fittings, pipe sections, grids, ...), the zeta value is often given in the data sheet.

Together with a given (or calculated) reference area A, the pressure drop can be calculated:

dp := zeta/(2*rho) * m_flow^2/A^2

The square of the mass-flow is regularized using the Modelica.Fluid.Utilities.regSquare function.

Interface

function zetaPressureLoss
  extends Internal.FlowResistance.partialPressureLoss;
  input Real zeta(unit = "1") "Zeta value of component" annotation(
    Dialog(enable = true));
  input Boolean fromGeometry = true "Calculate reference area from geometry inputs?" annotation(
    Dialog(enable = true));
  input SI.Area A = Modelica.Constants.pi*r*r "Custom reference area for dp calculation" annotation(
    Dialog(enable = not fromGeometry));
end zetaPressureLoss;