A novel suspension transport method: Viscoplastic lubrication of high-density fluids
| Autor: | S. Garmeh, Ali Dolatabadi, Ida Karimfazli |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Buoyancy
Materials science 010304 chemical physics Viscoplasticity Applied Mathematics Mechanical Engineering General Chemical Engineering Flow (psychology) Mechanics engineering.material Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Volumetric flow rate Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Phase space 0103 physical sciences Lubrication engineering General Materials Science Suspension (vehicle) Pressure gradient |
| Zdroj: | Journal of Non-Newtonian Fluid Mechanics. 287:104449 |
| ISSN: | 0377-0257 |
| DOI: | 10.1016/j.jnnfm.2020.104449 |
| Popis: | We present proof-of-concept experiments to illustrate the application of viscoplastic lubrication in transport of high-concentration suspensions. The proposed transport method appears robust for a wide range of suspension concentrations. We develop a theoretical description of the flow that incorporates the significant density difference between the suspension and the lubricating fluid. We explore the variation of the pressure gradient and the flow rate ratio with fluid properties and demonstrate that buoyancy effects expand the favorable lubrication regime within the phase space of the problem. We illustrate the possibility of flow reversal in the core fluid and the emergence of a new flow regime, two features not captured when buoyancy stresses are neglected. |
| Databáze: | OpenAIRE |
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