The pressure drop across the inlet and outlet connectors is
computed according to a turbulent friction model, i.e. is
proportional to the squared velocity of the fluid. The friction
coefficient can be specified directly, or by giving an operating
point, or as a multiple of the kinetic pressure. The correction
coefficient `Kfc` can be used to modify the friction
coefficient, e.g. to fit some experimental operating point.

A small linear pressure drop is added to avoid numerical
singularities at low or zero flowrate. The `wnom` parameter
must be always specified; the additional linear pressure drop is
such that it is equal to the turbulent pressure drop when the
flowrate is equal to `wnf*wnom` (the default value is 1% of
the nominal flowrate).

**Modelling options**

The actual gas used in the component is determined by the
replaceable `Medium` package. In the case of multiple
component, variable composition gases, the start composition is
given by `Xstart`, whose default value is
`Medium.reference_X`.

The following options are available to specify the friction coefficient:

`FFtype = 0`: the hydraulic friction coefficient`Kf`is used directly.`FFtype = 1`: the hydraulic friction coefficient is specified by the nominal operating point (`wnom`,`dpnom`,`rhonom`).`FFtype = 2`: the pressure drop is`K`times the kinetic pressure.

Name | Description |
---|---|

Medium | |

squareReg |

*19 Nov 2004*by Francesco Casella:

Adapted to Modelica.Media.

`Kfnom`removed,`Kf`can now be set directly.*5 Mar 2004*by Francesco Casella:

First release.

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