Dresden 2026 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Droplets, Wetting, and Microfluidics (joint session DY/CPP)

CPP 10.6: Vortrag

Montag, 9. März 2026, 16:15–16:30, ZEU/0118

Odd Droplets — •Thomas Appleford — University of Amsterdam, Amsterdam, Netherlands

In chiral systems such as active spinning colloidal matter, time-reversal symmetry-breaking interactions often give rise to a macroscopic continuum description in which the stress tensor contains off-diagonal terms. In fluids, these off-diagonal components lead to so-called "odd-viscous" deformations, in which energy is not dissipated. Odd viscous fluids have been shown to exhibit a rich variety of phenomena, including symmetry-broken flow around translating droplets and asymmetric droplet spreading on superhydrophobic surfaces. Our work investigates the behaviour of droplets in suspension. In particular, we present an analytical solution to the droplet-in-shear problem within the framework of two-dimensional odd Stokes flow, followed by the derivation of a formula for the apparent viscosity of a dilute emulsion. We then explore how chirality can be parametrically varied to tune the bulk rheological properties and control the system’s overall energy dissipation.

Keywords: Odd Viscosity; Droplets; Stokes Flow