Name

Default

Units

Description

Modelica ID

$A_{\max }$

$1·{10}^{\mathrm{-4}}$

$m^2$

Maximum orifice opening area

Amax

$A_{\min }$

$1·{10}^{\mathrm{-12}}$

$m^2$

Minimum orifice opening area (leakage)

Amin

$\mathrm{band}$

$0.1$

Transition length in normalized spool displacement

band

Name

Default

Units

Description

Modelica ID

$\mathrm{Use\; constant\; Cd}$

$\mathrm{true}$

True (checked) means a constant coefficient of discharge is implemented, otherwise a variable $C_d$ is used in flow calculations

UseConstantCd

$C_d$

$0.7$

Flow-discharge coefficient; used when $\mathrm{Use\; constant\; Cd}$ is true

Cd

${\mathrm{Re}}_{\mathrm{Cr}}$

$12$

Reynolds number at critical flow; used when $\mathrm{Use\; constant\; Cd}$ is true

ReCr

$C_{d\left(\max \right)}$

$0.7$

Maximum flow-discharge coefficient; used when $\mathrm{Use\; constant\; Cd}$ is false

Cd_max

${\mathrm{Crit}}_{\mathrm{no}}$

$1000$

Critical flow number; used when $\mathrm{Use\; constant\; Cd}$ is false

Crit_no

Name

Default

Units

Description

Modelica ID

$\mathrm{Use\; volume\; A}$

$\mathrm{false}$

True (checked) means a hydraulic volume chamber is added to portA

useVolumeA

$V_A$

$1·{10}^{\mathrm{-6}}$

$m^3$

Volume of chamber A

Va

$\mathrm{Use\; volume\; P}$

$\mathrm{false}$

True (checked) means a hydraulic volume chamber is added to portP

useVolumeP

$V_P$

$1·{10}^{\mathrm{-6}}$

$m^3$

Volume of chamber P

Vb