A nodalization scheme is a scheme of key nodes using a node topology (for example, a network) for reliable mathematical modeling of complex interconnected systems. Developed according to the requirements of system modeling based on knowledge of physical principles and developer experience. For the successful development of the nodalization scheme requires a thorough knowledge of the principles of operation of the simulated system. For example, for models of thermal hydraulic systems, the nodalization scheme can be built from the following types of objects:
- node (node) - a special element of the scheme (valve, branching, etc.);
- connection (junction) - the element that determines the topology of the scheme and the direction of movement of liquids;
- pipe (pipe) - the element representing the pipeline ;
- control volume - a fragment of the pipeline described by a separate set of parameters;
- heat structure (heat structure) - an element that describes the heat exchanger (and the heat exchange process in general).
In addition, ancillary (derived) types of objects in the form of multinodes (multinode) can be used - schema elements representing a set of simpler nodes that can differ in the values of their parameters. This feature is convenient for representing sets of similar nodes, allowing you to simplify the visual perception of the nodalization scheme.