The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions
An experimental study is performed to disclose the origin of Ekman flow on the surfaces of a rotating drum resulting from fluid-structure interaction after an impulsive start of motion (referred to as the spin-up process) or an impulsive stop (the spin-down process). Laser Doppler velocimetry (LDV)...
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| Format: | Article |
| Language: | English |
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Wiley
2001-01-01
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| Series: | International Journal of Rotating Machinery |
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| Online Access: | http://dx.doi.org/10.1155/S1023621X0100015X |
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| author | Wen-Jei Yang Hiroshi Ohue Genshi Kawashima |
| author_facet | Wen-Jei Yang Hiroshi Ohue Genshi Kawashima |
| author_sort | Wen-Jei Yang |
| collection | DOAJ |
| description | An experimental study is performed to disclose the origin of Ekman flow on the surfaces of a rotating drum resulting from fluid-structure interaction after an impulsive start of motion (referred to as the spin-up process) or an impulsive stop (the spin-down process). Laser Doppler velocimetry (LDV) is employed to determine instantaneous distribution of both the radial and angular velocity components in the flow field inside the rotating drum. From these results, the secondary flow and the time history of the Ekman boundary layer thickness are determined. The tracer/light sheet method is also engaged to enable real-time visualization of flow patterns. Fluid viscosity, drum size and rotational speed are varied to determine their effects on fluid-structure interactions. Results may be applied to cavity flow in rotating machinery. |
| format | Article |
| id | doaj-art-55f2dae46c3c4826b331c20d5ba37011 |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 2001-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-55f2dae46c3c4826b331c20d5ba370112025-02-03T01:33:17ZengWileyInternational Journal of Rotating Machinery1023-621X2001-01-017316517110.1155/S1023621X0100015XThe Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational MotionsWen-Jei Yang0Hiroshi Ohue1Genshi Kawashima2Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor 48109-2125, Michigan, USADepartment of Mechanical Engineering, Musashi Institute of Technology, Tamazutsumi, Setagaya-ku, Tokyo 158-8557, JapanDepartment of Mechanical Engineering, Musashi Institute of Technology, Tamazutsumi, Setagaya-ku, Tokyo 158-8557, JapanAn experimental study is performed to disclose the origin of Ekman flow on the surfaces of a rotating drum resulting from fluid-structure interaction after an impulsive start of motion (referred to as the spin-up process) or an impulsive stop (the spin-down process). Laser Doppler velocimetry (LDV) is employed to determine instantaneous distribution of both the radial and angular velocity components in the flow field inside the rotating drum. From these results, the secondary flow and the time history of the Ekman boundary layer thickness are determined. The tracer/light sheet method is also engaged to enable real-time visualization of flow patterns. Fluid viscosity, drum size and rotational speed are varied to determine their effects on fluid-structure interactions. Results may be applied to cavity flow in rotating machinery.http://dx.doi.org/10.1155/S1023621X0100015XEkman flowCavity spaceImpulsive rotational motionLDVTracer/light sheet method. |
| spellingShingle | Wen-Jei Yang Hiroshi Ohue Genshi Kawashima The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions International Journal of Rotating Machinery Ekman flow Cavity space Impulsive rotational motion LDV Tracer/light sheet method. |
| title | The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions |
| title_full | The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions |
| title_fullStr | The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions |
| title_full_unstemmed | The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions |
| title_short | The Origin of Ekman Flow in a Cavity Subject to Impulsive Rotational Motions |
| title_sort | origin of ekman flow in a cavity subject to impulsive rotational motions |
| topic | Ekman flow Cavity space Impulsive rotational motion LDV Tracer/light sheet method. |
| url | http://dx.doi.org/10.1155/S1023621X0100015X |
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