LaminarResistance

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LaminarResistance

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Iconic Diagrams\Hydraulics\Restrictions

Use

Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Hydraulics).

Description

This model describes the laminar flow through a component:

 

pa.phi = pb.phi = G*(pa.p - pb.p);

 

with the conductance calculated out of the flow (Q_nom) at a nominal pressure drop (p_nom).

 

G = Q_nom / p_nom;

 

The pressure at both ports has a lower limit which is equal to the vapour pressure. Therefore the actual equations used in this component are:

 

p1_lim = if pa.p < p_vapour then p_vapour else pa.p end;

p2_lim = if pb.p < p_vapour then p_vapour else pb.p end;

dp = p1_lim - p2_lim;

pa.phi = G*dp;

pb.phi = pa.phi;

 

There is no check on the validity of laminar flow in this component!

Interface

Ports

Description

pa, pb

Both terminals of the hydraulic component.

Causality

 

fixed volume flow out pa

fixed volume flow out pb

 

Parameters

 

p_nom

Q_nom

nominal pressure drop [Pa]

flow at nominal pressure drop {m3/s]