Work

Deformation of ellipsoidal droplets in homogeneous and isotropic turbulence

Year: 2025

Type: article

Abstract: We examine the statistics of the deformation of sub-Kolmogorov droplets in homogeneous isotropic turbulence (HIT). Data obtained with various phenomenological ellipsoidal models (EMs) -- assuming that the droplet preserves the ellipsoidal shape at all times -- are compared with ground-truth data obtained with three-dimensional fully resolved simulations (FRSs), without any ad-hoc assumption on the droplet shape. We find that some EM models show close agreement with FRS data across the range of capillary numbers explored. Given the computational expense of FRS the possibility to generate ensembles of data with quantitatively validated EMs in shorter times could be useful for some purposes.

Source: Physical Review Fluids

DOI: 10.1103/zhzf-q2b9

Authors: Fabio Guglietta, Diego Taglienti, Mauro Sbragaglia

Institutions: University of Rome Tor Vergata, Istituto Nazionale di Fisica Nucleare

Language: English

Topic: Fluid Dynamics and Heat Transfer

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Ministero dell'Università e della Ricerca, Horizon 2020 Framework Programme, H2020 European Research Council, NextGenerationEU

Awards: G7860113109, G874694918