Rene Chevray

Faculty Emeritus
Email: rc16@columbia.edu
 
 
 
 
 

Rene Chevray is a professor Emeritus of mechanical engineering at Columbia University and the former director of the Turbulence Research Laboratory. He received his Ph.D. from the University of Iowa in 1967 and his D.Sc. from the Claude Bernard University of Lyon in 1978. He was a lecturer and postdoctoral fellow at the Johns Hopkins University and a Professor of Mechanical Engineering at the State University of New York at Stony Brook before joining Columbia in 1982.

Professor Chevray's current research interests include dynamical systems in fluid mechanics and chaotic advection: A novel methd of fluid mixing chatic advection is studied from a fundatmental point of view. Applications to systems which cannot sustain high rates are studies; in particular, this method is presently used to separate fetal erythrocytes from maternal blood. It is also used to separate particles with only slight variations in size or density.

Coating processes with viscoelastic liquids: We are studying, numerically and experimentally, flows of small-scale laminar free-surface flows in order to be able to deposit one or several liquid films on a moving substrate. These flows invariably involve non-Newtonian viscoelastic fluids whose behavior is little understood especially in the high Weisenberg number regime corresponding to the elastic behavior used in coating operations.

Drag reduction by polymeric fluid: The well-known phenomenon of drag reduction by long chain molecules introduced in a turbulent flow is still not understood. In an effort to understand this mechanism, we are studying flows of polymeric fluids in a free jet configuration where the total absence of walls might reveal details of the fine structure of turbulence which is quite different with and without polymers.

Publications

R. Chevray and J. Mathieu, Topics in Fluid Mechanics, Cambridge University Press, graduate text- book, 1993.

R. Chevray and P. Dutta, "Fluid Mixing by Chaotic Advection," Proceedings, First ISHMT-ASME Heat and Mass Transfer Conference, Sukhatone et al., Ed., Vadams Books International, 1994.

P. Dutta and R. Chevray, "Role of Transient Velocities and Diffusion of Chaotic Advection in an Eccentric Annulus," Proceedings, Fifth Asian Congress of Fluid Mechanics, Daejon, Korea, June 1992.

P. Dutta and R. Chevray, "Effects of Diffusion on Chaotic Advection in Stokes Flow," The Physics of Fluids A, Vol. 3, 1991, pp. 1440.

R. Chevray, "Fractals," Yearbook of Science and Technology, McGraw-Hill Encyclopedia of Science and Technology, 1991.

E. Panides and R. Chevray, "Vortex Dynamic in a Plane, Moderate-Reynolds-Number Shear Layer," J. Fluid Mech., Vol. 214, 1990, pp. 411.

R. Chevray, "Chaos and the Onset of Turbulence," Chapter 5, Advances in Turbulence, W. K. George and R. Arndt, Editors, Hemisphere, 1989, pp. 127-158.

R. Chevray, "Chaotic Advection in a Shear Layer," American Physical Society, Bulletin, 34, 1989, p. 1143.

S. Iida and R. Chevray, "Solving Laminar Boundary Layer Equations," Chapter 4, Encyclopedia of Fluid Mechanics, N. P. Cheremisinoff, Editor, Golf, 1989, pp. 83-110.

R. Chevray, K. Ogawara, and S. Iida, "General Aspects of Chaotic Phenomena", J. Japan Society of Mechanical Engineers, Vol. 91, 1989, pp. 1129-1134.

P. Dutta and R. Chevray, "Inertial Effects in Chaotic Mixing with Diffusion", J. Fluid Mech., Vol. 285, 1, 1995.


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