Mechanical Engineering: Faculty Publications

Development and Assessment of a New Flow-Through Test Instrument to Study Wear and Erosion Effects of Nanofluids

Document Type

Article

Publication Date

1-1-2017

Publication Title

International Journal of Surface Engineering and Interdisciplinary Materials Science

DOI

10.4018/IJSEIMS.2017010104

ISSN

2166-7233

Abstract

Nanofluids, the suspensions of nano-size powders in ordinary fluids, are of technical interest for their enhanced cooling properties, but their possible erosion-corrosion effects on cooling-system materials are mostly unknown. This paper discusses the rationale for designing and developing a new test-rig with flow-through parallel to the tested surfaces. The instrument conduct-chamber accommodates multiple specimens for simultaneous testing, and controlled fluid speed and temperature. This study shows that the new rig yields measurable surface-modifications from nanofluid action in reasonable test-times. Results are presented for a nanofluid (of 2%-alumina-nanopowder in water) that is recirculated in parallel-flow contact with polished aluminum and copper. Surface modifications are assessed by roughness, weighing of removed-material, and optical-microscopy, and results indicate that nanopowders can lead to patterns of wear, erosion and corrosion that are substantially different than those typically obtained from the base-fluids.

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