Work

How turbulence increases the bubble–particle collision rate

Year: 2025

Type: article

Abstract: We study the effect of turbulence on collisions between a finite-size bubble and small inertial particles based on interface-resolved simulations. Our results show that the interaction with the flow field around the bubble remains the dominant effect. Nonlinear dependencies in this process can enhance the turbulent collision rate by up to 100 % compared to quiescent flow. Fluctuations in the bubble slip velocity during the interaction with the particle additionally increase the collision rate. We present a frozen-turbulence model that captures the relevant effects providing a physically consistent framework to model collisions of small inertial particles with finite-sized objects in turbulence.

Source: Journal of Fluid Mechanics

DOI: 10.1017/jfm.2025.44

Authors: Linfeng Jiang, Dominik Krug

Institutions: Max Planck University of Twente Center for Complex Fluid Dynamics, University of Twente

Language: English

Topic: Particle Dynamics in Fluid Flows

Subfield: Ocean Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,550

Funders: European Commission, H2020 European Research Council