# Alexandre Chorin

**Alexandre Joel Chorin** (born 25 June 1938) is known for his contributions to computational fluid mechanics, turbulence, and computational statistical mechanics.

Alexandre Joel Chorin | |
---|---|

Born | Warsaw, Poland | June 25, 1938

Nationality | American |

Alma mater | Courant Institute of Mathematical Sciences |

Known for | Artificial Compressibility Method Projection Method Random Vortex Method Implicit Sampling |

Scientific career | |

Fields | Mathematics |

Institutions | University of California, Berkeley, Courant Institute of Mathematical Sciences |

Thesis | Numerical Study of Thermal Convection in a Fluid Layer Heated from Below (1966) |

Doctoral advisor | Peter D. Lax |

Doctoral students | Phillip Colella Charles S. Peskin James Sethian |

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 ,[1] the projection method,[2] and vortex methods.[3] He has made numerous contributions to turbulence theory.[4] In recent years he has been developing methods for prediction in the face of uncertainty [5] and for filtering and data assimilation .[6]

## Career

Chorin is a University Professor at the University of California, a Professor of Mathematics at the University of California, Berkeley and a Senior Scientist at the Lawrence Berkeley National Laboratory.

Chorin received the Ing. Dipl. Physics degree from the Ecole Polytechnique of Lausanne in 1961, an M.S. in Mathematics from New York University in 1964, and a PhD in Mathematics from New York University in 1966.

Chorin is widely recognized for his mentoring of graduate students [7] 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 University of California Berkeley.[8]

## 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),[9] the Lagrange Prize of the International Council on Industrial and Applied Mathematics (2011) and the National Medal of Science (2012).[10][11] He is a member of the US National Academy of Sciences and a fellow of the American Academy of Arts and Sciences, the Society for Industrial and Applied Mathematics, and the American Mathematical Society.

## Journal publications

- Chorin, A. J. (1967). "A numerical method for solving incompressible viscous flow problems".
*Journal of Computational Physics*.**2**: 12. Bibcode:1967JCoPh...2...12C. doi:10.1016/0021-9991(67)90037-X. - 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, Alexandre J.; Marsden, Jerrold E. (1993).
*A Mathematical Introduction to Fluid Mechanics*. Texts in Applied Mathematics.**4**(3rd ed.). New York: Springer Verlag. ISBN 0387979182. - Chorin, A. J., "Vorticity and Turbulence", Springer-Verlag (1994).[12]
- Chorin, A.J. and O.H. Hald, "Stochastic Tools in Mathematics and Science", Springer-Verlag, 3rd ed., (2013).

## References

- http://math.berkeley.edu/~chorin/chorin67.pdf
- http://math.berkeley.edu/~chorin/chorin68.pdf
- http://math.berkeley.edu/~chorin/jfm73.pdf
- https://www.springer.com/mathematics/analysis/book/978-0-387-94197-4
- http://math.berkeley.edu/~chorin/CHK02.pdf
- http://math.berkeley.edu/~chorin/CMT10.pdf
- http://genealogy.math.ndsu.nodak.edu/id.php?id=30630
- http://grad.berkeley.edu/mentoringawards/slideshow_08.shtml
- 2000 AMS-SIAM Wiener Prize
- http://nationalmedals.org/laureates/alexandre-chorin
- White House press statement - President Obama Honors Nation’s Top Scientists and Innovators
- Majda, Andrew. "Review:
*Vorticity and Turbulence*, by Alexandre Chorin" (PDF).*Bull. Amer. Math. Soc. (N.S.)*.**33**(1): 71–73. doi:10.1090/s0273-0979-96-00632-5.