Measuring elasticity-induced unstable flow structures in a curved microchannel using confocal micro particle image velocimetry
| Autor: | Feng-Chen Li, Masamichi Oishi, Xiao-Bin Li, Marie Oshima, Song-Jing Li |
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| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Curvilinear coordinates Materials science Microchannel Internal flow Mechanical Engineering General Chemical Engineering Confocal Aerospace Engineering Nanotechnology Mechanics Velocimetry Curvature 01 natural sciences 010305 fluids & plasmas Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Nuclear Energy and Engineering Particle image velocimetry Particle tracking velocimetry 0103 physical sciences 010306 general physics |
| Zdroj: | Experimental Thermal and Fluid Science. 75:118-128 |
| ISSN: | 0894-1777 |
| DOI: | 10.1016/j.expthermflusci.2016.02.005 |
| Popis: | This paper presents a measurement of the three-dimensional structures of a micellar solution flow in a curvilinear microchannel using confocal micro particle image velocimetry. An aqueous solution of cetyltrimethylammonium chloride/sodium salicylate was used as the working fluid, and fluorescent beads were added as tracer particles. With the aid of a fast-moving piezo stage, the three-dimensional flow structure was measured by scanning the flow layer by layer in the depth direction. It was found that the internal flow oscillates, and is typically twisted. In addition, the flow direction changes according to geometric curvature. Based on the statistics of velocity features, the viscoelastic flow field inside the curved microchannel shares the main features of elastic turbulence. |
| Databáze: | OpenAIRE |
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