In thermodynamics, phenomenological thermodynamics is the study of systems, from the thermodynamics viewpoint, wherein specifically the actions of the individual parts or components of the system are not discussed. [1]

References
1. Ulanowicz, Robert E. (2009). A Third Window: Natural Life beyond Newton and Darwin (pg. xxiii-xxiv). Templeton Foundation Press.

External links
Phenomenological thermodynamics – Wikibin.

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