Viscoelasticity and shear-thinning effects on bio-polymer solution and suspended particle behaviours under oscillatory curve Couette flow conditions
| Autor: | Michel Cervantes, Nazanin Emami, Alaleh Safari |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
oscillatory curve Couette flow
Strömningsmekanik och akustik 02 engineering and technology channel flow 01 natural sciences 0203 mechanical engineering Teknik och teknologier polymer solutions lcsh:QD415-436 Composite material prosthetics viscoelasticity lubrication human joint synovial fluid Shear thinning Fluid Mechanics and Acoustics 010304 chemical physics wear particle distribution patterns motion frequency Surfaces Coatings and Films 020303 mechanical engineering & transports suspended particles Tribology (Interacting Surfaces including Friction Lubrication and Wear) Tribologi (ytteknik omfattande friktion nötning och smörjning) Lubrication Engineering and Technology Two-phase flow design parameters Shear flow Materials science shear flow lcsh:Biotechnology Biomedical Engineering Biophysics implant gap failure (mechanical) wear resistance Viscoelasticity biomechanics Biomaterials lcsh:Biochemistry flow visualisation lcsh:TP248.13-248.65 0103 physical sciences suspensions Couette flow non-Newtonian flow fluid shear thinning biomedical materials fluid oscillations Mechanical Engineering microparticle image velocimetry cross-stream migration biolubricant flows lubricants Open-channel flow total hip replacement two-phase flow bearing surfaces curved minichannels Particle elasticity human activities biopolymer solution |
| Zdroj: | Biosurface and Biotribology (2018) |
| 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. Validerad;2018;Nivå 1;2018-08-16 (andbra) |
| Databáze: | OpenAIRE |
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