期刊
POWDER TECHNOLOGY
卷 364, 期 -, 页码 484-493出版社
ELSEVIER
DOI: 10.1016/j.powtec.2020.02.002
关键词
Erosion; Nanofluids; Modelling; Theoretical analysis; Collisions; Multiphase flows; Contact mechanics
资金
- Russian Science Foundation [19-79-10083]
- Russian Science Foundation [19-79-10083] Funding Source: Russian Science Foundation
The present paper focuses on the issue of erosion due to fluid flow laden with nano- and microparticles. We investigated the case of a pipe elbow using theoretical analysis and numerical simulations. For the case when the particles were large, that is, of micrometre size, we observed the expected behaviour in which the erosion rate was greater with increasing particle diameter. The same was seen for flow velocity, and higher velocities promoted the erosion process. For small particles, however, the erosion rate increased with decreasing particle size. This was explained by the formation of secondary flows in the elbow that centrifuged the particles towards the walls. For very small particles, the erosion rate decreased again, i.e. the particle distribution towards the wall was insufficient to erode the pipe wall due to the particles low mass. (C) 2020 Elsevier B.V. All rights reserved.
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