Deposition of micron liquid droplets on wall in impinging turbulent air jet |
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Authors: | Tianshu Liu Jacob Nink Parviz Merati Tian Tian Yong Li Tom Shieh |
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Affiliation: | (1) Department of Mechanical and Aeronautical Engineering, Western Michigan University, Kalamazoo, MI 49008, USA;(2) Sloan Automotive Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;(3) Toyota Motor Engineering and Manufacturing North America, Inc, Toyota Technical Center, Ann Arbor, MI 48105, USA |
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Abstract: | The fluid mechanics of the deposition of micron liquid (olive oil) droplets on a glass wall in an impinging turbulent air jet is studied experimentally. The spatial patterns of droplets deposited on a wall are measured by using luminescent oil visualization technique, and the statistical data of deposited droplets are obtained through microscopic imagery. Two distinct rings of droplets deposited on a wall are found, and the mechanisms of the formation of the inner and outer rings are investigated based on global diagnostics of velocity and skin friction fields. In particular, the intriguing effects of turbulence, including large-scale coherent vortices and small-scale random turbulence, on micron droplet deposition on a wall and coalescence in the air are explored. |
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