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Meccanica
Published in: Meccanica 1-2/2017

24-03-2016

Micro-grooves design to modify the thermo-capillary migration of paraffin oil

Authors: Qingwen Dai, Wei Huang, Xiaolei Wang

Published in: Meccanica | Issue 1-2/2017

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Abstract

Thermo-capillary migration is a phenomenon in which thermal gradients drive a liquid to flow without any external force. It is important to prevent the migration of liquid lubricants for moving mechanisms. This study aimed to investigate the influence of micro-grooves patterns on the migration of paraffin oil and obtain a design concept of micro-grooves patterns to obstruct the migration. Micro-grooves patterns with different orientations and geometric parameters were fabricated on the surface of SUS 316 stainless steel. Migration experiments of paraffin oils on each specimen were performed under various temperature gradients. The results indicated that micro-grooves patterns strongly modified the thermo-capillary migration. Micro-grooves perpendicular to the temperature gradient obstructed the migration effectively, while micro-grooves parallel to the temperature gradient accelerated the migration. The width and depth of micro-grooves influenced the migration behavior obviously, and the effects of these geometric parameters were discussed in detail.
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Metadata
Title
Micro-grooves design to modify the thermo-capillary migration of paraffin oil
Authors
Qingwen Dai
Wei Huang
Xiaolei Wang
Publication date
24-03-2016
Publisher
Springer Netherlands
Published in
Meccanica / Issue 1-2/2017
Print ISSN: 0025-6455
Electronic ISSN: 1572-9648
DOI
https://doi.org/10.1007/s11012-016-0413-3

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