University of Colorado Mourns the Loss of Esteemed Professor and Research Pioneer, Dr. Keith Julien

The academic and scientific community is mourning the loss of Dr. Keith Julien, a distinguished Chair and Professor of Applied Mathematics at the University of Colorado, Boulder. Dr. Julien, who passed away unexpectedly on April 14, was a respected academic, a Fellow of the American Physical Society, and a member of the Editorial Board of Physical Review Fluids. His death is a significant loss to his family and the field of fluid dynamics.

Throughout his career, Dr. Julien contributed significantly to the fields of geophysical and astrophysical fluid dynamics, and applied mathematics. His research focused on the complexities of stratified flows influenced by rotation and magnetism. He conducted important studies on convection, magnetoconvection, dynamos, the magnetorotational instability, and double diffusive convection. His work often involved advanced numerical simulations and the creation of new numerical algorithms, especially in spectral methods.

Dr. Julien was known for using multiscale asymptotic methods to study turbulent flows under significant constraints. His efforts led to the development of simplified sets of partial differential equations that captured the key dynamics of these complex systems. His methods are now widely used in the fluid dynamics community, particularly in studies of rapidly rotating, buoyancy-driven convection.

In addition to his research, Dr. Julien was committed to the academic and personal development of his students. As Chair of the Department of Applied Mathematics, he played a key role in improving the department's programs and creating a supportive environment for both undergraduate and graduate students. His leadership was marked by purpose, balance, and humor.

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