Collisional damping of spherical ice particles
Artikel i vetenskaplig tidskrift, 2021

This paper presents experimental values for the coefficient of restitution (en) for millimeter-sized ice particles colliding with massive walls at different temperatures. Three different wall materials are tested: hardened glass, ice and Acrylonitrile butadiene styrene (ABS) polymer. The results show a high sensitivity to impact velocity Vi, where en decreases rapidly with increasing Vi. The results also show a decrease in en with increasing temperature T. A novel model that predicts en based on the assumption of collisional melting and viscous damping caused by an increased premelted liquid-layer, is proposed. The model predicts both the velocity and the temperature trends seen in the experiments. The difference obtained in experiments between wall materials is also captured by the new model. A generalized regime map for ice particle collisions is proposed to combine the new model with previous work.

surface melting

coefficient of restitution

premelting

particle impact

ice adhesion

icing

Författare

Tobias Eidevåg

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparat- och reaktionsteknik

Erik S Thomson

Göteborgs universitet

Sofia Sollén

Luleå tekniska universitet

Johan Casselgren

Luleå tekniska universitet

Anders Rasmuson

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparat- och reaktionsteknik

Powder Technology

0032-5910 (ISSN)

Vol. 383 May 318-327

CAE methodology for vehicle snow packing and sensor availability for active safety and autonomous vehicles

VINNOVA, 2018-01-01 -- 2021-12-31.

Ämneskategorier

Kemiteknik

DOI

10.1016/j.powtec.2021.01.025

Mer information

Skapat

2021-02-12