Fall 2025 Colloquium Schedule

Colloquia are the first Thursday of every month at 3:35 p.m.

August 28— "Eulerian and Lagrangian transport in wall-bounded turbulent flows"

Presenter: Andrew Grace, CU-APPM
Abstract:��The dynamics of fluids in Earth's waters and atmosphere profoundly affect many aspects of our lives, including weather forecasting, disaster response, and our climate. In this talk, I will present some results surrounding fluid mixing, turbulence, and Lagrangian particle dispersion, which represent several of the important underlying physical processes in these applications. I will begin by providing an overview of how we model the motion of incompressible fluids (the incompressible Navier-Stokes equations under the Boussinesq approximation) and show examples of numerical solutions to these equations in different contexts. I will then highlight recent results focused on how we can apply these equations to model turbulent transport of solid particles in buoyancy driven and mechanically driven turbulent flows. Specifically, I will discuss how multi-scale fluid structures in wall-bounded turbulent flows mediate dispersion processes near solid surfaces, and how we can model these interactions. Finally, I will finish the talk by highlighting several exciting avenues for future research.