Adrian Bejan

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Adrian Bejan
Born Galaţi, Romania
Education MIT (1971,1972,1975)
Occupation Distinguished Professor at the Duke University
Known for thermodynamics, heat transfer, and the constructal law

Adrian Bejan is an American professor who developed modern thermodynamics and the constructal law of design and evolution in nature. He is J. A. Jones Distinguished Professor of Mechanical Engineering at Duke University.[1]

Adrian Bejan was born in Galaţi, a port town located on the Danube in Romania. His mother, Marioara Bejan (1914–1998), was a pharmacist.[2][non-primary source needed] His father, Dr. Anghel Bejan (1910–1976), was a veterinarian. [2]Adrian Bejan showed an early talent in drawing, and his parents enrolled him in art school. He also excelled in basketball, which earned him a position on the Romanian national basketball team.

Adrian Bejan received all his degrees from MIT: BS 1971 (Honors Course), MS 1972 (Honors Course), and PhD in 1975, all from the Department of Mechanical Engineering at MIT.

Adrian Bejan was appointed full professor with tenure at Duke University in 1984. He was awarded the J.A. Jones distinguished professorship in 1989.[1]

Adrian Bejan has published 600 peer-reviewed articles and 28 books.[3] He pioneered numerous original methods in science, such as the constructal law of design and evolution in nature,[4][non-primary source needed][5][non-primary source needed][6][non-primary source needed][7][non-primary source needed][8][non-primary source needed] entropy generation minimization,[9][non-primary source needed] scale analysis[10][non-primary source needed] of convection, heatlines and masslines, transition to turbulence, and designed porous media.[11][non-primary source needed]

He was awarded 17 doctorates Honoris Causa from universities in 11 countries.

In 2001, he was listed by ISI among the top 100 Highly Cited in all Engineering.

Bejan numbers

Adrian Bejan has contributed to identify scales in heat, mass and momentum transport phenomena and applications and respective dimensionless groups that were named after him by the scientific community:

  • Bejan number (Be), proposed as name for the dimensionless ratio of fluid friction irreversibility divided by heat transfer irreversibility, in convection;[12]
  • Bejan number (Be), proposed as name for the dimensionless group ΔP·L2 / (μD) and ΔP·L2 / (ρD2) in mass transfer.[13]
  • Bejan number (Be), proposed as name for the dimensionless group ΔP·L2 / (ρν2) in fluid mechanics.[14]
  • Bejan number (Be), proposed as name for the dimensionless group ΔP·L2 / (μα) and ΔP·L2 / (ρα2) in forced convection, electronic cooling, contact melting, and second law analysis of heat transfer;[15]

Later Awad and Lage provided a general form for the Bejan number.[16]

Thomson Reuters' portal Web of Knowledge® shows the use and citation (1415) of Bejan numbers is increasing geometrically along the years.[17]


  1. ^ a b Duke Mechanical Engineering Faculty, Adrian Bejan's page.
  2. ^ a b Bejan, Adrian; Zane, J. Peder (2012). Design in Nature: How the Constructal Law Governs Evolution in Biology, Physics, Technology, and Social Organization. Double Day. ISBN 9780385534611. 
  3. ^ Adrian Bejan's ISI page[dead link]
  4. ^ A. Bejan and S. Lorente, The constructal law and the thermodynamics of flow systems with configuration, Int. J. Heat Mass Transfer, 47, 2004, pp. 3203–3214. doi:10.1016/j.ijheatmasstransfer.2004.02.007.
  5. ^ A. Bejan and S. Lorente, Constructal theory of generation of configuration in nature and engineering, J. Appl. Phys., 100, 2006, 041301. doi:10.1063/1.2221896.
  6. ^ A. H. Reis, Constructal theory: from engineering to physics, and how flow systems develop shape and structure, Appl. Mech. Rev., 59, 2006, pp. 269–281. doi:10.1115/1.2204075.
  7. ^ A. Bejan and S. Lorente, The constructal law of design and evolution in nature, Philosophical Transactions of the Royal Society B, 365, 2010, pp. 1335–1347.
  8. ^ A. Bejan and S. Lorente, The Constructal law and the evolution of design in nature, Physics of Life Reviews, 8, 2011, pp. 209–240.
  9. ^ A. Bejan, Advanced Engineering Thermodynamics, 3rd ed., Wiley, Hoboken, 2006.
  10. ^ A. Bejan, Convection Heat Transfer, 4th ed., Wiley, Hoboken, 2013.
  11. ^ D.A. Nield, A. Bejan, Convection in Porous Media, 4th ed., Springer, New York, 2013.
  12. ^ Paoletti, S.; Rispoli, F.; Sciubba, E. (1989). "Calculation of exergetic losses in compact heat exchanger passager". ASME AES-Vol. 10 (2): 21–29. 
  13. ^ Awad, M.M. (2012). "A new definition of Bejan number". Thermal Science 16 (4): 1251. doi:10.2298/TSCI12041251A. 
  14. ^ Bhattacharjee, S.; Grosshandler, W. L. (1988). "The formation of wall jet near a high temperature wall under microgravity environment". ASME 1988 National Heat Transfer Conference 96: 711–716. Bibcode:1988nht.....1..711B. 
  15. ^ Petrescu, S. (1994). "Comments on ‘The optimal spacing of parallel plates cooled by forced convection’". Int. J. Heat Mass Transfer 37 (8): 1283. doi:10.1016/0017-9310(94)90213-5. 
  16. ^ Awad, M.M.; Lage, J. L. (2013). "Extending the Bejan number to a general form". Thermal Science 17 (2): 631. doi:10.2298/TSCI130211032A. 
  17. ^ Web of Knowledge® "bejan number" (as of November 13, 2014).

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