Contact Force Mediated Rapid Deposition of Colloidal Microspheres Flowing over Microstructured Barriers

Prakash, P and Abdulla, AZ and Varma, M (2021) Contact Force Mediated Rapid Deposition of Colloidal Microspheres Flowing over Microstructured Barriers. In: Langmuir, 37 (23). pp. 6915-6922.

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Abstract

Deposition of particles while flowing past constrictions is a ubiquitous phenomenon observed in diverse systems. Some common examples are jamming of salt crystals near the orifice of salt shakers, clogging of filter systems, gridlock in vehicular traffic, etc. Our work investigates the deposition events of colloidal microspheres flowing over microstructured barriers in microfluidic devices. The interplay of DLVO, contact, and hydrodynamic forces in facilitating rapid deposition of microspheres is discussed. Noticeably, a decrease in the electrostatic repulsion among microspheres leads to linear chain formations, whereas an increase in roughness results in rapid deposition. ©

Item Type:	Journal Article
Publication:	Langmuir
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to American Chemical Society
Keywords:	Microspheres; Microstructure, Colloidal microspheres; Contact forces; Electrostatic repulsion; Filter system; Hydrodynamic forces; Linear chain; Micro-fluidic devices; Salt crystals, Deposition
Department/Centre:	Division of Interdisciplinary Sciences > Robert Bosch Centre for Cyber Physical Systems Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Aug 2021 08:55
Last Modified:	02 Aug 2021 08:55
URI:	http://eprints.iisc.ac.in/id/eprint/69030

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