Subhasish Dey

Subhasish Dey (Bengali: শুভাশীষ েদ; born 1958) is a hydraulician and educator. He is known for his research on the hydrodynamics and acclaimed for his contributions in developing theories and solution methodologies of various problems on hydrodynamics, turbulence, boundary layer, sediment transport and open channel flow. He is currently a Professor of the Department of Civil Engineering,[1] Indian Institute of Technology Kharagpur,[2] where he served as the Head of the Department during 2013-15 and held the position of Brahmaputra Chair Professor during 2009-14 and 2015. He also holds an Adjunct Professor position in the Physics and Applied Mathematics Unit[3] at Indian Statistical Institute Kolkata.[4] Besides he has been named a Distinguished Visiting Professor at the Tsinghua University in Beijing, China.[5]

Subhasish Dey
শুভাশীষ েদ
Born1958 (age 61–62)
Jalpaiguri, West Bengal, India
NationalityIndian
Alma materUniversity of North Bengal
Indian Institute of Technology Kharagpur
Known forHydraulic engineering, Sediment transport, Turbulence
Scientific career
FieldsHydrodynamics
InstitutionsIndian Institute of Technology Kharagpur

Dey is an associate editor of Journal of Geophysical Research - Earth Surface,[6][7] Journal of Hydraulic Engineering,[8][9] Journal of Hydraulic Research,[10][11] Sedimentology,[12][13] Acta Geophysica,[14][15][16] Journal of Hydro-Environment Research,[17][18] International Journal of Sediment Research[19] and Journal of Numerical Mathematics and Stochastics.[20] He is also an editorial board member of several journals including the Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences.[21]

Brief biography

Dey was born to Bimalendu Dey (father) and Kana Dey (mother) in Jalpaiguri town, West Bengal, India in 1958. In 1987, he married Swastika Dey (née Talukdar); and they have a son, Sibasish, and a daughter, Sagarika.[22]

Career

Dey received B.E. degree in civil engineering from the University of North Bengal in 1981, MTech degree in water resources engineering and PhD degree in hydraulic engineering from the Indian Institute of Technology Kharagpur in 1984 and 1992, respectively.[1][22] He started his professional career as a faculty of the National Institute of Technology, Durgapur, where he taught fluid mechanics and hydraulics from 1984 to 1998. Then, he joined as a faculty of the Indian Institute of Technology Kharagpur in 1998.[1]

Honors

Dey has become a fellow of the Indian National Science Academy (FNA), Indian Academy of Sciences (FASc), National Academy of Sciences, India (FNASc) and Indian National Academy of Engineering (FNAE).[23] He received the JC Bose Fellowship award in 2018. He is the Vice President of the Council of World Association for Sedimentation and Erosion Research (WASER) (2019–2022). He served as a Council Member[24][25] of the World Association for Sedimentation and Erosion Research (WASER) (2011–2013) and the International Association for Hydro-Environment Engineering and Research (IAHR) (2015-2019). He is also a Member of the IAHR Fluvial Hydraulics Committee. Dey is ranked among the 150 most cited researchers in civil engineering in Shanghai’s Global Ranking of Academics.

Contributions

He has developed various theories of hydrodynamics. He discovered the origin of the scaling laws of sediment transport and the onset of a straight river to meander. In turbulence, he developed universal probability density function for turbulent velocity fluctuations, Reynolds stress and conditional Reynolds shear stresses in wall-shear flows. In fluvial hydraulics, he has contributed fundamental theories of sediment thresholds (also known as initiation of motion), discovered existence of negative hydrodynamic lift and non-universality of von Kármán constant. He has made pioneering contributions to the mechanism of scour at hydraulic structures. Besides, he has developed theories of secondary boundary layer in curved pipes, wall jets, seeping bed flows and turbulent bursting etc.

Books
  • Dey, S. (2014). Fluvial Hydrodynamics: Hydrodynamic and Sediment Transport Phenomena. GeoPlanet: Earth and Planetary Sciences. Springer. ISBN 978-3-642-19061-2.
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References
  1. "Indian Institute of Technology Kharagpur".
  2. "Indian Institute of Technology Kharagpur".
  3. Physics and Applied Mathematics Unit
  4. "Indian Statistical Institute Kolkata".
  5. "清华大学 - Tsinghua University".
  7. https://agupubs.onlinelibrary.wiley.com/hub/journal/21699011/associate-editors. Missing or empty |title= (help)
  8. Journal of Hydraulic Engineering
  9. "Aims & Scope and Editorial Board (ASCE)".
  10. "Welcome to the Home Page of the Journal of Hydraulic Research!".
  11. "Journal of Hydraulic Research - Editorial board".
  12. "Sedimentology". Wiley. doi:10.1111/(ISSN)1365-3091. Cite journal requires |journal= (help)
  13. "Sedimentology - Editorial Board Library". Wiley. doi:10.1111/(ISSN)1365-3091. Cite journal requires |journal= (help)
  14. Acta Geophysica
  15. Kwiatek, Grzegorz. "Acta Geophysica".
  16. Acta Geophysica, Editorial Board (Springer)
  17. Journal of Hydro-environment Research - Elsevier.
  18. Journal of Hydro-environment Research Editorial Board.
  19. Elsevier. "International Journal of Sediment Research - 1001-6279 - Elsevier".
  20. "Numerical Mathematics and Stochastics".
  21. "Proceedings of the Royal Society".
  22. "Marquis Who's Who".
  23. INAE Fellow
  24. Council of WASER
  25. "International Association for Hydro-Environment Engineering and Research".

Further reading
  • E. Padhi, S. Z. Ali and S. Dey (2019). "Mechanics of bed particle saltation in turbulent wall-shear flow". Proceedings of Royal Society A, London, UK, Vol. 475, No. October, pp. 20190318.
  • S. Dey, S. Z. Ali and E. Padhi (2019). "Terminal fall velocity: The legacy of Stokes from the perspective of fluvial hydraulics". Proceedings of Royal Society A, London, UK, Vol. 475, No. August, pp. 20190277.
  • S. Dey and S. Z. Ali (2019). "Bed sediment entrainment by streamflow: State of the science". Sedimentology, Wiley, Vol. 66, No. 5, 1449–1448.
  • S. Z. Ali and S. Dey (2019). "Hydrodynamics of a weakly curved channel". Physics of Fluids, American Institute of Physics (AIP), Vol. 31, No. 5, pp. 055110.
  • E. Padhi, N. Penna, S. Dey and R. Gaudio (2019). "Near-bed turbulence structures in water-worked and screeded gravel-bed flows". Physics of Fluids, American Institute of Physics (AIP), Vol. 31, No. 4, pp. 045107.
  • S. Z. Ali and S. Dey (2019). "Bed particle saltation in turbulent wall-shear flow: A review". Proceedings of Royal Society A, London, UK, Vol. 475, No. March, pp. 20180824.
  • S. Dey S, G. Ravi Kishore, O. Castro-Orgaz and S. Z. Ali (2019). "Turbulent length scales and anisotropy in submerged turbulent plane offset jets". Journal of Hydraulic Engineering, American Society of Civil Engineers (ASCE), Vol. 145, No. 2, pp. 04018085.
  • E. Padhi, N. Penna, S. Dey and R. Gaudio (2018). "Spatially-averaged dissipation rate in flows over water-worked and screeded gravel beds". Physics of Fluids, American Institute of Physics (AIP), Vol. 30, No. 12, pp. 125106.
  • E. Padhi, N. Penna, S. Dey and R. Gaudio (2018). "Hydrodynamics of water-worked and screeded gravel beds: A comparative study". Physics of Fluids, American Institute of Physics (AIP), Vol. 30, No. 8, pp. 085105.
  • H. Fang, X. Han, G. He and S. Dey (2018). "Influence of permeable beds on hydraulically macro-rough flow". Journal of Fluid Mechanics, Cambridge University Press, UK, Vol. 847, No. July, 552–590.
  • S. Dey and S. Z. Ali (2018). "Review Article: Advances in modeling of bed particle entrainment sheared by turbulent flow". Physics of Fluids, American Institute of Physics, Vol. 30, No. 6, pp. 061301.
  • S. Z. Ali and S. Dey (2018). "Impact of phenomenological theory of turbulence on pragmatic approach to fluvial hydraulics". Physics of Fluids, American Institute of Physics, Vol. 30, No. 4, pp. 045105.
  • S. Z. Ali and S. Dey (2017). "Hydrodynamic instability of a meandering channel". Physics of Fluids, American Institute of Physics, Vol. 29, No. 12, pp. 125107.
  • S. Dey and S. Z. Ali (2017). "Origin of the onset of meandering a straight river". Proceedings of the Royal Society A, London, UK, Vol. 473, No. August, pp. 20170376.
  • S. Dey, G. Ravi Kishore, O. Castro-Orgaz and S. Z. Ali (2017). "Hydrodynamics of submerged turbulent plane offset jets". Physics of Fluids, American Institute of Physics, Vol. 29, No. 6, pp. 065112.
  • S. Dey and S. Z. Ali (2017). "Stochastic mechanics of loose boundary particle transport in turbulent flow". Physics of Fluids, American Institute of Physics, Vol. 29, No. 5, pp. 055103.
  • S. Dey and S. Z. Ali (2017). "Mechanics of sediment transport: Particle scale of entrainment to continuum scale of bedload flux". Journal of Engineering Mechanics, American Society of Civil Engineers (ASCE), Vol. 143, No. 11, pp. 04017127.
  • S. Z. Ali and S. Dey (2017). "Origin of the scaling laws of sediment transport". Proceedings of the Royal Society A, London, UK, Vol. 473, Issue 2197, pp. 20160785.
  • S. Z. Ali and S. Dey (2016). "Mechanics of advection of suspended particles in turbulent flow". Proceedings of the Royal Society A, London, UK, Vol. 472, Issue, 2195, pp. 20160749.
  • S. Z. Ali and S. Dey (2016). "Hydrodynamics of sediment threshold". Physics of Fluids, American Institute of Physics, Vol. 28, No. 7, pp. 075103.
  • S. Dey and R. Das (2012). "Gravel-bed hydrodynamics: A double-averaging approach". Journal of Hydraulic Engineering, American Society of Civil Engineers (ASCE), Vol. 138, No. 8, 707–725.
  • S. Dey, S. Sarkar and F. Ballio (2011). "Double-averaging turbulence characteristics in seeping rough-bed streams". Journal of Geophysical Research, Earth Surface, American Geophysical Union, Vol. 116, F03020, doi:10.1029/2010JF001832
  • S. Dey, T. K. Nath and S. K. Bose (2010). "Submerged wall-jets subjected to injection and suction from the wall". Journal of Fluid Mechanics, Cambridge University Press, UK, Vol. 653, 57–97.
  • R. Gaudio, R. Miglio and S. Dey (2010). "Nonuniversality of von Kármán’s κ in fluvial streams". Journal of Hydraulic Research, International Association for Hydraulic Research (IAHR), Vol. 48, No. 5, 658–663.
  • S. K. Bose and S. Dey (2010). "Universal probability distributions of turbulence in open channel flows". Journal of Hydraulic Research, International Association for Hydraulic Research (IAHR), Vol. 48, No. 3, 388–394.
  • S. K. Bose and S. Dey (2009). "Reynolds averaged theory of turbulent shear flow over undulating beds and formation of sand waves". Physical Review E, The American Physical Society, Vol. 80, 036304.
  • S. K. Bose and S. Dey (2007). "Theory of free surface flow over rough seeping beds". Proceedings of the Royal Society A, London, UK, Vol. 463, No. February, 369–383.
  • S. Dey and A. Sarkar (2006). "Response of velocity and turbulence in submerged wall jets to abrupt changes from smooth to rough beds and its application to scour downstream of an apron". Journal of Fluid Mechanics, Cambridge University Press, UK, Vol. 556, 387–419.
  • S. Dey (2002). "Secondary boundary layer and wall shear for fully developed flow in curved pipes". Proceedings of the Royal Society A, London, UK, Vol. 458, No. February, 283–294.
  • S. Dey (1999). "Sediment threshold". Applied Mathematical Modelling, Elsevier, Vol. 23, No. 5, 399–417.
  • S. Dey, S. K. Bose and G. L. N. Sastry (1995). "Clear water scour at circular piers: a model". Journal of Hydraulic Engineering, American Society of Civil Engineers (ASCE), Vol. 121, No. 12, 869–876.
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