
Key: SYSPHS1216

Status: open

Source: Webel IT Australia ( Darren Kelly)

Summary:
In Figure 60: Hydraulics blocks, ports, & component properties
The resistance:ViscousResistance has to be treated as a PhSVariable not a PhSConstant or the system of equations for ConnectedTanks is ill formed. Validation of the export in one Modelica tool gives:
The model has 6 variables and 7 equations.
Even though resistance:ViscousResistance is effectively a constant (as it is always computed from values that don't change with time) it is in fact handled like a variable via a Constraint:
{resistance=(8*viscosity*length)/(3.1416*(radius^4))}

Reported: SysPhS 1.1 — Tue, 16 Feb 2021 08:58 GMT

Updated: Sat, 27 Feb 2021 10:53 GMT
SYSPHS12 — The resistance:ViscousResistance in Figure 60 has to be treated as a PhSVariable not a PhSConstant or the systems of equations is ill formed
 Key: SYSPHS1216
 OMG Task Force: SysPhS 1.2 RTF