Viscoelasticity and shear-thinning effects on bio-polymer solution and suspended particle behaviours under oscillatory curve Couette flow conditions
| Autor: | Alaleh Safari, Nazanin Emami, Michel Jose Cervantes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lubricants
polymer solutions Couette flow non-Newtonian flow lubrication fluid oscillations shear flow biomechanics elasticity wear resistance flow visualisation viscoelasticity prosthetics biomedical materials suspensions two-phase flow failure (mechanical) channel flow total hip replacement bearing surfaces wear particle distribution patterns implant gap design parameters human joint synovial fluid microparticle image velocimetry motion frequency biolubricant flows suspended particles fluid shear thinning biopolymer solution oscillatory curve Couette flow curved minichannels cross-stream migration Biotechnology TP248.13-248.65 Biochemistry QD415-436 |
| Zdroj: | Biosurface and Biotribology (2018) |
| Druh dokumentu: | article |
| ISSN: | 2405-4518 |
| DOI: | 10.1049/bsbt.2018.0002 |
| Popis: | Formation of wear particles within total hip replacement is one of the main causes of its failure. In addition to improving the lubrication and wear resistance of materials used as bearing surfaces, understanding of wear particle distribution patterns within lubricants inside an implant gap could be used to improve design parameters and implants’ lifespan. In this study, the behaviours of biolubricants (with compositions similar to human joint synovial fluid) and suspended particles were investigated by micro-particle image velocimetry in curved mini channels under oscillatory Couette flow conditions. The studied biolubricants had shear-thinning viscoelastic characteristics. The authors found that increasing shear-thinning, elasticity or motion frequency levels did not affect the trend behaviours of biolubricant flows due to the low strain values of the experimental conditions applied. However, suspended particles formed strings along flow directions and exhibited cross-stream migration to channel walls. Motion frequency, fluid shear thinning and elasticity characteristics and channel dimensions strongly affected particle behaviours. |
| Databáze: | Directory of Open Access Journals |
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