Incrustation of wet dirt on glass surfaces through convective drying
Artikel i vetenskaplig tidskrift, 2018

The macroscopic and microscopic structural patterns formed during the convective drying of aqueous suspensions of dirt (mixture of dust, salt and water) on glass surfaces are investigated. The effects of dust size distribution, convective airflow temperature and velocity on the morphology of the deposited dust aggregates and salt crystals are studied. The critical removal forces necessary to leave behind a clean surface is experimentally determined. Drying at high temperature would cause a strong evaporation rate gradient leading to formation of salt rings and “cauliflower growths” while drying at low temperature results in large individual crystals. The critical removal forces also correlate to these deposition patterns with the more raised structures requiring the lowest removal force. The strongest adhesive contacts are observed for samples with smoother morphology. The latter usually forms at high level of salt supersaturation (fast drying) in the presence of dust particles.

Deposition patterns

Incrustation

Drying suspensions

Författare

Hannah Waters

Chalmers, Kemi och kemiteknik

Mohammad Khalilitehrani

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparatteknik

Farin Daryosh

Volvo

Anders Rasmuson

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparatteknik

Powder Technology

0032-5910 (ISSN)

Vol. 340 173-180

Ämneskategorier

Fysikalisk kemi

Livsmedelsteknik

Annan materialteknik

DOI

10.1016/j.powtec.2018.08.079

Mer information

Senast uppdaterat

2018-09-28