Study of a composite thermal fin performance with uncertain parameters

As a fact, the mathematical models of physical phenomena are based on the exact principles. However, thereal world is the world of uncertainties. Particularly, thermos-physical properties of materials, often, are not preciselyknown due to their experimental nature. Therefore, practically, the effect of uncertain input parameters should beconsidered. In this study, the heat transfer and thermal performance of a straight composite fin is investigated underuncertain thermos-physical parameters. The uncertainties are modeled with triangular fuzzy numbers. In contrast tothe most of common methods, by using fuzzy numbers it is possible to take into account the “expert opinion” on theuncertain parameter via the concept of membership degree. Some of the results of the present study are compared withthe results of Monte Carlo method, showing good agreement.

کلیدواژه ها:

Uncertainty ، Composite thermal fin ، Fuzzy numbers ، Granular computing