functionzetaPressureLoss
Pressure loss coefficient function
Extends from Internal.FlowResistance.partialPressureLoss.
Information
For specific components (armatures, fittings, pipe sections, grids, ...), the pressure loss coefficient is often given in the data sheet.
Together with a given (or calculated) reference area A, the pressure drop can be calculated:
dp := zeta * rho/2 * v^2 = zeta/(2*rho) * m_flow^2/A^2
The square of the mass-flow is regularized using the Modelica.Fluid.Utilities.regSquare function.
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | zeta | Pressure loss coefficient (dp = zeta*rho/2*v^2) | |
| Boolean | fromGeometry | true | = true, if cross-sectional area if calculated from geometry |
| SI.Area | A | Modelica.Constants.pi*r*r | Cross-sectional area |