Webel: Psy/MPsy: Psychrometrics for Mathematica: A suffix '$wat$i' indicates water (liquid or vapour) flow TO (into) the humid air mixture. A suffix '$wat$o' indicates water (liquid or vapour) flow FROM (out of) the humid air mixture.
Webel: Psy/MPsy: Psychrometrics for Mathematica: A suffix '$wat' indicates a water-related variable, quantity, or function (note that 'w' is reserved for the humidity ratio).
SysML+SysPhS: Flows: If you intend to use a Classifier to type the itemProperty of an ItemFlow on a Connector for a physical interaction you MUST use a Block (not a ValueType or Signal) so your can extend ConservedQuantityKind.
SysML: Flows: If you use a Signal to type the itemProperty of an ItemFlow on a Connector, care must be take in how you create the Property or you might get an unwanted signal Reception on the owning context Block.
SysML: Whether you use a Block, ValueType, or Signal to represent something that flows (and can be applied to an ItemFlow) depends on what you want to achieve. If you want to indicate something structured with value properties with Units use a Block.
Rate ... When the stereotype is applied to a parameter, the parameter shall be streaming, and the stereotype gives the number of objects or values that flow in or out of the parameter per time interval while the behavior or operation is executing. Source OMG Systems Modeling Language (SysML) 1.6
Continuous ... It is independent from UML streaming, see clause 11.3.2.8. A streaming parameter may or may not apply to continuous flow, and a continuous flow may or may not apply to streaming parameters. Source OMG Systems Modeling Language (SysML) 1.6
Continuous rate is a special case of rate of flow (see Rate) where the increment of time between items approaches zero. It is intended to represent continuous flows that may correspond to water flowing through a pipe, a time continuous signal, or ... Source OMG Systems Modeling Language (SysML) 1.6
Discrete and continuous flows are unified under rate of flow, as is traditionally done in mathematical models of continuous change, where the discrete increment of time approaches zero. Source OMG Systems Modeling Language (SysML) 1.6
Restrictions on the rate at which entities flow along edges in an activity, or in and out of parameters of a behavior (see Rate in Figure 11-8). This includes both discrete and continuous flows, either of material, energy, or information. Source OMG Systems Modeling Language (SysML) 1.6