John Sebastian

Fluid Mechanics; Applied Mathematics; Soft matter; Biophysics

Portrait

I am a physicist and engineer working at the interface of fluid mechanics, soft matter physics, and geometric mechanics. The interplay of form and function in physical and biological systems has been a subject of timeless curiosity for natural philosophers. Inspired by this, I have investigated how geometry, confinement, and stochastic forcing govern transport, flow, and deformation across scales, from nanofluidic systems to macroscopic flexible structures, using continuum theory, asymptotic analysis, numerical simulations, and controlled experiments.

I am currently a PhD student in the Soft Matter Biophysics group at the Technical University of Denmark, where I pursue problems in which morphology and mechanics co-evolve, including the differential geometry of evolving interfaces, the inference of interaction forces from kinematic observations, and electrokinetic regulation of signalling in organisms that lack a nervous system, such as plants.