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Vortex tracking on visualized temperature fields in a rotating Rayleigh-Benard convection

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/76217

Title: Vortex tracking on visualized temperature fields in a rotating Rayleigh-Benard convection
Authors: Noto, Daisuke Browse this author
Tasaka, Yuji Browse this author →KAKEN DB
Yanagisawa, Takatoshi Browse this author
Park, Hyun Jin Browse this author
Murai, Yuichi Browse this author →KAKEN DB
Keywords: Thermochromic liquid crystals
Rotating convection
Vortex tracking
Vortex behavior
Issue Date: Dec-2018
Publisher: Springer
Journal Title: Journal of visualization
Volume: 21
Issue: 6
Start Page: 987
End Page: 998
Publisher DOI: 10.1007/s12650-018-0510-6
Abstract: We established a vortex detection method using instantaneous temperature fields that were visualized using thermochromic liquid crystals (TLCs) to investigate behaviors of vortical structures in a rotating Rayleigh-Benard convection. Experimental testing was performed at a fixed Rayleigh number in water containing encapsulated TLCs. Vortices were recognized as undulations that appear in the horizontal temperature fields, thus making vortex detection with high spatial resolution possible, and this enabled quantitative investigation of the dynamics of vortical structures. Standard template matching was used to detect individual vortices on visualized temperature fields, and two-dimensional curved surface fitting was adopted to remove erroneous detections and to evaluate shapes of local temperature fields corresponding to vortical structures. Additionally, vortex tracking clearly showed geometric advection pattern of vortical structures.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/76217
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田坂 裕司

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