In FCSys, the
`unit`

attribute of each `Real`

variable
actually denotes the dimension.^{1} The fundamental dimensions are angle (A), length
(L), mass (M), particle number (N), and time (T). These are
combined according to the rules established for unit strings
[Modelica2010,
p. 210]. Temperature and charge are derived dimensions (see
the Units package).

The `quantity`

attribute is not used since the type
*is* the quantity. The `displayUnit`

attribute is
only used for quantities that imply a certain display unit.

Methods for unit checking have been established [Mattsson2008, Broman2008, Aronsson2009] and can, in theory, be applied to dimension checking instead.

The Quantities package
is abbreviated as `Q`

throughout the rest of FCSys.

1. This misnomer is necessary because
`Real`

variables do not have a `dimension`

attribute.↵

**Licensed by the Hawaii Natural Energy Institute under the
Modelica License 2**

Copyright © 2007–2014, Hawaii
Natural Energy Institute and Georgia Tech Research
Corporation.

*This Modelica package is free software and the use is
completely at your own risk; it can be redistributed and/or
modified under the terms of the Modelica License 2. For license
conditions (including the disclaimer of warranty) see FCSys.UsersGuide.License
or visit http://www.modelica.org/licenses/ModelicaLicense2.*

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

Examples | Examples |

Acceleration | |

Amount | |

AmountReciprocal | Reciprocal of amount |

Angle | |

Angle2 | Solid angle |

Area | |

AreaSpecific | Specific area |

Capacitance | |

Density | |

DensityRate | Rate of density |

ConductanceElectrical | Electrical conductance |

ConductivityElectrical | Electrical conductivity |

Continuity | |

Current | |

CurrentAreic | Areic current |

CurrentAreicAbsolute | Absolute areic current |

CurrentRate | Rate of current |

Diffusivity | |

Energy | |

Fluidity | |

Force | |

ForceSpecific | Specific force |

Frequency | |

Inductance | |

Length | |

LengthReciprocal | Reciprocal of length |

LengthSpecific | Specific length |

MagneticFlux | Magnetic flux |

MagneticFluxAreic | Areic magnetic flux |

MagneticFluxReciprocal | Reciprocal of magnetic flux |

Mass | |

MassSpecific | Specific mass |

MassVolumic | Volumic mass |

Mobility | |

MomentumRotational | Rotational momentum |

Number | |

NumberAbsolute | Absolute number |

Permeability | |

Permittivity | |

PermittivityReciprocal | Reciprocal of permittivity |

Potential | |

PotentialAbsolute | Absolute potential |

PotentialPerWavenumber | Potential per wavenumber |

PotentialRate | Rate of potential |

Power | |

PowerArea | Power times area |

PowerAreic | Areic power |

PowerAreicPerPotential4 | Areic power per 4th power of potential |

PowerRadiant | Radiant power |

Pressure | |

PressureAbsolute | Absolute pressure |

PressureRate | Rate of pressure |

PressureReciprocal | Reciprocal of pressure |

ResistanceElectrical | Electrical resistance |

ResistanceThermal | Thermal resistance |

SurfaceTension | Surface tension |

Resistivity | |

Time | |

TimeAbsolute | Absolute time |

TimeLineic | Lineic time |

Velocity | |

Velocity2 | Squared velocity |

VelocityAmount | |

Volume | |

VolumeRate | Rate of volume |

VolumeSpecific | Specific volume |

VolumeSpecificAbsolute | Absolute specific volume |

VolumeSpecificRate | Rate of specific volume |

Wavenumber | |

CapacityThermal | Thermal capacity |

CapacityThermalSpecific | Specific thermal capacity |

CapacityThermalVolumic | Volumic thermal capacity |

PotentialChemical | Chemical potential |

Temperature | |

TemperatureAbsolute | Absolute temperature |

TemperatureRate | Rate of temperature |

ResistivityThermal | Thermal resistivity |

Conductance | Conductance |

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