flow function

Storage

Definition A storage represents a system which serves as an accumulator of mass or energy. A storage function can have any number of connections and any num- ber of enabling conditions. An example could be the function of a tank when used as a device for accu- mulation of a fluid, in this example we… read more »

Balance

A balance represents the function of a system which provides a balance between the total rates of incom- ing and outgoing flows. Each balance function can have any number of connections and any number of conditions

Sink

Definition A sink represents the function of a system serving as an infinite drain of mass or energy. As for the source function, this function can be used in many cases as an adequate abstraction. Rules A sink has one input A sink must alway be connected to a transport

Transport

A transport represents the function of a system transferring mass or energy between two systems or locations. A transport function has one upstream and one downstream connection to an influence rela- tion. The downstream connection point is indicated by the arrow head representing the direction of flow. Note that the flow direction is not identical… read more »

Source

  Definition A source represents the function of a system serving as an infinite reservoir of mass or energy. No physically realizable has in principle unlimited capability to deliver mass or energy. However, the source function is used to provide an adequate abstraction of the physical phenomena considered. Rules 1: A source has one output… read more »

Flow functions

In MFM functions are defined in relation to the processing of flows of mass and energy. MFM is based on a set of six generic flow functions representing different primitive operations performed on either mass or energy flow. These six functions are shown in the figure below and include: source, transport, storage, sink, balance and… read more »

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