[Faculty] Fwd: [CSRC.COLLOQUIUM] "On the Physics and Simulation of Turbulent Flows"

[Jose Castillo]

[image: SDSU_CSRC Logo.jpg]


DATE:
*Friday, March 11, 2022*


TITLE:
*On the Physics and Simulation of Turbulent Flows *



TIME:
*3:30-4:30PM*



LOCATION:
*In Person - GMCS 314*


SPEAKER/BIO:
*Perry Johnson, Mechanical and Aerospace Engineering, University of CA,
Irvine  *


ABSTRACT:
The phenomenon of turbulence in fluid flows is a paradigmatic nonlinear
multiscale dynamical system in classical physics with important
implications for a wide range of natural and engineered flows. Brute force
simulations of many societally-relevant turbulent flows are far out of
reach even on today's world-class supercomputers, and this will remain the
case for the foreseeable future. As a result, turbulence modeling plays a
central role in advancing the state-of-the-art for computational fluid
dynamics. A promising, and increasingly popular approach to turbulence
modeling is Large-Eddy Simulation (LES). In LES, the large-scale turbulent
fluctuations of a given flow are directly resolved and approximate models
are constructed to represent the net effects of smaller-scale motions. One
of the primary tasks of LES sub-grid scale models is to remove kinetic
energy from resolved scales in an accurate manner. In this talk, I will
review the scale-wise dynamics of kinetic energy in turbulent flows as it
relates to modeling and simulation. A new perspective on the underlying
theory of LES will be introduced, advancing our fundamental understanding
of turbulence physics and suggesting a new framework for extending the
effectiveness of LES to more complex flows.


Host:
*Jose Castillo*

Note: Videos of previous colloquium talks can be seen on the CSRC website
in the colloquium archive section or on the CSRC YouTube page here
<https://www.youtube.com/channel/UCN0ZEztlmyDqG2pm-Rle_Eg/feed>.






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