Home > Academics > Academic Units > Departments > Civil Engineering > Subhasish Dey
Professor
Civil Engineering
Subhasish Dey has contributed in developing fundamental theories and solution methodologies of various problems on hydrodynamics. He was the first to model the horseshoe vortex flow around a cylinder with a scour hole (Dey et al. 1995, J. Hydraul. Eng.). The secondary fluid motion in curved-pipes was modelled by him (Dey 2002, Proc. Royal Society London) using turbulent boundary-layer approach. He put forward the methodology to compute the Reynolds shear-stress in submerged wall-jet boundary-layers (Dey and Sarkar 2006, J. Fluid Mech.). He applied Reynolds-averaged Navier-Stokes equations to investigate the physics of fluid flow subjected to bed-injection (Bose and Dey 2007, Proc. Royal Society London). He hypothesized the instability theory for turbulent shear-flow over undulating sand-beds providing the criteria for bed-forms development (Bose and Dey 2009, Phys. Review E). He developed the theory of self-preserving characteristics of turbulent flow in submerged wall-jets and analyzed bursting events (Dey et al. 2010, J. Fluid Mech.). He discovered the non-universality of von Kármán constant in fluvial streams (Gaudio, Miglio and Dey 2010, J. Hydraul. Res.). Another significant contribution by Dey to turbulence research is the development of universal probability theory for turbulence quantities (Bose and Dey 2010, J. Hydraul. Res.). His contribution on the double-averaged turbulence characteristics brings up the new issues on macro-rough flows (Dey and Das 2012, J. Hydraul. Eng.). In fluvial hydraulics, some of his notable contributions are the development of fundamental theories on sediment transport and scour problems. He put forward mathematical models of sediment threshold in turbulent flow (Dey 1999, Applied Math. Model; Ali and Dey 2016, Phys. Fluids). He has authored a text book (Dey 2014: Fluvial Hydrodynamics, Springer-Verlag). Presently, he is engaged in studying the turbulence characteristics over rough-beds and other turbulence related problems. His general areas of research interests encompass analytical hydrodynamics, sediment transport and turbulence.
Turbulence laws in natural bed flows by Ferraro D., Servidio S. , Carbone V. , Dey S. , Gaudio R. Journal of Fluid Mechanics 798 540-571 (2016)
Distribution of suspended sediment concentration in wide sediment-laden streams: a novel power-law theory by Cantero-chinchilla F. N., Castro-orgaz O. , Dey S. Sedimentology 63 1620-1633 (2016)
Transport of biofilm-coated sediment particles by Fang H., Fazeli M. , Cheng W. , Dey S. Journal of Hydraulic Research 54 631-645 (2016)
J. C. Bose Fellowship (Subhasish Dey) Science and Engineering Research Board
Stability of Rajghat High Embankment and Keleghai Bridge Foundation Design Measures South Eastern Railway
Akram Ahmed
Area of Research: IMPACT OF CLIMATE CHANGE ON EROSION AND SEDIMENTATION OF TEESTA RIVER BASIN
Sriparna Paira
Area of Research: Hydraulics in Aquacultural Engineering
Vijit Rathore
Area of Research: Hydraulic Engineering
Prianka Paul
Area of Research: Hydrodynamics
Sammelan Chowdhury
Area of Research: Applied hydrodynamics
