68 citations · 113 across the 7 of their papers we have counts for
7 papers
Formulation and calibration of CATKE, a one-equation parameterization for microscale ocean mixing
Gregory LeClaire Wagner, Adeline Hillier, Navid C. Constantinou +7
We describe CATKE, a parameterization for fluxes associated with small-scale or "microscale" ocean turbulent mixing on scales between 1 and 100 meters. CATKE uses a downgradient fo…
Transforming Butterflies into Graphs: Statistics of Chaotic and Turbulent Systems
Andre N. Souza
We formulate a data-driven method for constructing finite volume discretizations of a dynamical system's underlying Continuity / Fokker-Planck equation. A method is employed that a…
Statistical Nonlocality of Dynamically Coherent Structures
Andre N. Souza, Tyler Lutz, Glenn R. Flierl
We introduce a class of stochastic advection problems amenable to analysis of turbulent transport. The statistics of the flow field are represented as a continuous time Markov proc…
Capturing missing physics in climate model parameterizations using neural differential equations
Ali Ramadhan, John Marshall, Andre Souza +8
We explore how neural differential equations (NDEs) may be trained on highly resolved fluid-dynamical models of unresolved scales providing an ideal framework for data-driven param…
Wall-to-wall optimal transport in two dimensions
Andre N. Souza, Ian Tobasco, Charles R. Doering
Gradient ascent methods are developed to compute incompressible flows that maximize heat transport between two isothermal no-slip parallel walls. Parameterizing the magnitude of ve…
Intermittency at Fine Scales and Complex Singularities of Turbulent Couette Flow
Andre Souza, Divakar Viswanath
Fine scales of turbulent velocity fields, beyond the inertial range and well into the dissipative range, are highly intermittent. It has been hypothesized that complex plane singul…
Wall to Wall Optimal Transport
Pedram Hassanzadeh, Gregory P. Chini, Charles R. Doering
The calculus of variations is employed to find steady divergence-free velocity fields that maximize transport of a tracer between two parallel walls held at fixed concentration for…