Bejan number [SEP] named after
Bejan number
There are two different Bejan numbers (Be) used in the scientific domains of thermodynamics and fluid mechanics. Bejan numbers are named after Duke University professor Adrian Bejan.
Thermodynamics.
In the field of thermodynamics the Bejan number is the ratio of heat transfer irreversibility to total irreversibility due to heat transfer and fluid friction:
where
Fluid mechanics, heat transfer and mass transfer.
In the field of fluid mechanics the Bejan number is the dimensionless pressure drop along a channel of length formula_4:
where
book combined thermodynamics theory with engineering heat transfer and fluid mechanics, and introduced entropy generation minimization as a method of optimization. In 1996 the ASME awarded him the Worcester Reed Warner Medal for "originality, challenges to orthodoxy, and impact on thermodynamics and heat transfer, which were made through his first three books".
In 1989 Bejan was appointed the J. A. Jones Distinguished Professor of Mechanical Engineering. In 1988 and 1989, his peers named two dimensionless groups "Bejan number (Be)," in two different fields: