Alexandre Joel Chorin (born 25 June 1938) is an American mathematician known for his contributions to

computational fluid mechanics Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate the ...

turbulence In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between ...

, and computational

statistical mechanics In physics, statistical mechanics is a mathematical framework that applies statistical methods and probability theory to large assemblies of microscopic entities. It does not assume or postulate any natural laws, but explains the macroscopic be ...

. Chorin's work involves developing methods for solving physics and fluid mechanics problems computationally. His early work introduced several widely used numerical methods for solving the Navier-Stokes equations, including the method of artificial compressibility, the projection method, and vortex methods. He has made numerous contributions to turbulence theory. In recent years he has been developing methods for prediction in the face of uncertainty and for filtering and data assimilation.

Career

Chorin is a

University Professor Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who professes". Professors ...

at the

University of California The University of California (UC) is a public land-grant research university system in the U.S. state of California. The system is composed of the campuses at Berkeley, Davis, Irvine, Los Angeles, Merced, Riverside, San Diego, San Francisco, ...

, a Professor of Mathematics at the

University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant u ...

and a Senior Scientist at the

Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory (LBNL), commonly referred to as the Berkeley Lab, is a United States Department of Energy National Labs, United States national laboratory that is owned by, and conducts scientific research on behalf of, t ...

. Chorin received the Ing. Dipl. Physics degree from the EPFL (École Polytechnique Fédérale de Lausanne) in 1961, an M.S. in Mathematics from New York University in 1964, and a PhD in Mathematics from

New York University New York University (NYU) is a private research university in New York City. Chartered in 1831 by the New York State Legislature, NYU was founded by a group of New Yorkers led by then-Secretary of the Treasury Albert Gallatin. In 1832, the ...

in 1966. Chorin is widely recognized for his mentoring of graduate students and postdoctoral fellows, many of whom have become nationally and internationally recognized scientists in their own right. In 2008 he was honored with the Sarlo mentoring award by the

Awards

Chorin's awards include the National Academy Award in Applied Mathematics and Numerical Analysis (1989), the Norbert Wiener Prize of the American Mathematical Society and the Society for Industrial and Applied Mathematics (2000), the Lagrange Prize of the International Council on Industrial and Applied Mathematics (2011) and the National Medal of Science (2012). He is a member of the US

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...

and a fellow of the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and ...

, the

Society for Industrial and Applied Mathematics Society for Industrial and Applied Mathematics (SIAM) is a professional society dedicated to applied mathematics, computational science, and data science through research, publications, and community. SIAM is the world's largest scientific socie ...

, and the

American Mathematical Society The American Mathematical Society (AMS) is an association of professional mathematicians dedicated to the interests of mathematical research and scholarship, and serves the national and international community through its publications, meetings, ...

Journal publications

#
Chorin, A. J. "A numerical method for solving incompressible viscous flow problems" J. Comput. Phys. 2 (1967), pp. 12-26.Chorin, A. J. Numerical solution of the Navier-Stokes equations Math. Comp. 22 (1968) pp. 745-762

Chorin, A. J., Numerical study of slightly viscous flow, J. Fluid. Mech. 57 (1973), pp. 785-796.
#Chorin, A.J., Hald, O.H., and Kupferman, R., Optimal prediction and the Mori-Zwanzig representation of irreversible processes, Proc. Natl. Acad. Sci. USA 97 (2000), pp. 2968–2973. #Chorin, A.J. and Tu, X., Implicit sampling for particle filters, Proc. Natl. Acad. Sci. USA 106 (2009), pp. 17249–17254.

Books authored

* * Chorin, A. J., "Vorticity and Turbulence", Springer-Verlag (1994). * Chorin, A.J. and O.H. Hald, "Stochastic Tools in Mathematics and Science", Springer-Verlag, 3rd ed., (2013).

References

External links

* {{DEFAULTSORT:Chorin, Alexandre Joel Living people University of California, Berkeley College of Letters and Science faculty Numerical analysts Fluid dynamicists Members of the United States National Academy of Sciences Courant Institute of Mathematical Sciences alumni New York University faculty 1938 births Fellows of the Society for Industrial and Applied Mathematics Fellows of the American Mathematical Society