Visualisation of turbulent spots under the influence of adverse pressure gradients
In this paper, a method of using temperature sensitive liquid crystal to visualize the thermal footprints of turbulent spots is described. It is employed to study the nature and development of artificially created turbulent spots in a laminar boundary layer over a heated surface under the influence...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2000
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| _version_ | 1797072540921757696 |
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| author | Zhong, S Kittichaikan, C Hodson, H Ireland, P |
| author_facet | Zhong, S Kittichaikan, C Hodson, H Ireland, P |
| author_sort | Zhong, S |
| collection | OXFORD |
| description | In this paper, a method of using temperature sensitive liquid crystal to visualize the thermal footprints of turbulent spots is described. It is employed to study the nature and development of artificially created turbulent spots in a laminar boundary layer over a heated surface under the influence of adverse pressure gradients in a water flow experiment. This method not only provides qualitative information about the structures and growth of the spot but also contours of heat flux beneath an entire spot as it propagates downstream. Furthermore, the lateral spreading angle and propagation rate of turbulent spots are obtained by analysing the colour images and heat transfer contours. The results are compared with those obtained by other researchers using different experimental methods. |
| first_indexed | 2024-03-06T23:09:11Z |
| format | Journal article |
| id | oxford-uuid:64e20330-19f9-4081-a507-8f4e864e38bd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:09:11Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:64e20330-19f9-4081-a507-8f4e864e38bd2022-03-26T18:21:46ZVisualisation of turbulent spots under the influence of adverse pressure gradientsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:64e20330-19f9-4081-a507-8f4e864e38bdEnglishSymplectic Elements at Oxford2000Zhong, SKittichaikan, CHodson, HIreland, PIn this paper, a method of using temperature sensitive liquid crystal to visualize the thermal footprints of turbulent spots is described. It is employed to study the nature and development of artificially created turbulent spots in a laminar boundary layer over a heated surface under the influence of adverse pressure gradients in a water flow experiment. This method not only provides qualitative information about the structures and growth of the spot but also contours of heat flux beneath an entire spot as it propagates downstream. Furthermore, the lateral spreading angle and propagation rate of turbulent spots are obtained by analysing the colour images and heat transfer contours. The results are compared with those obtained by other researchers using different experimental methods. |
| spellingShingle | Zhong, S Kittichaikan, C Hodson, H Ireland, P Visualisation of turbulent spots under the influence of adverse pressure gradients |
| title | Visualisation of turbulent spots under the influence of adverse pressure gradients |
| title_full | Visualisation of turbulent spots under the influence of adverse pressure gradients |
| title_fullStr | Visualisation of turbulent spots under the influence of adverse pressure gradients |
| title_full_unstemmed | Visualisation of turbulent spots under the influence of adverse pressure gradients |
| title_short | Visualisation of turbulent spots under the influence of adverse pressure gradients |
| title_sort | visualisation of turbulent spots under the influence of adverse pressure gradients |
| work_keys_str_mv | AT zhongs visualisationofturbulentspotsundertheinfluenceofadversepressuregradients AT kittichaikanc visualisationofturbulentspotsundertheinfluenceofadversepressuregradients AT hodsonh visualisationofturbulentspotsundertheinfluenceofadversepressuregradients AT irelandp visualisationofturbulentspotsundertheinfluenceofadversepressuregradients |