https://scholars.lib.ntu.edu.tw/handle/123456789/627614
標題: | On the double-diffusive layer formation in the vertical annulus driven by radial thermal and salinity gradients | 作者: | Wang, CC FALIN CHEN |
關鍵字: | Double -diffusive stability; Convection; Cylindrical annulus; Convection layer; Parallel gradients; CONVECTION; STABILITY | 公開日期: | 2022 | 出版社: | PERGAMON-ELSEVIER SCIENCE LTD | 卷: | 125 | 來源出版物: | MECHANICS RESEARCH COMMUNICATIONS | 摘要: | We employ the Chebyshev tau-qz algorithm developed by Straughan and co-workers (1996, 2013) to investigate the stability of the double-diffusive convection in a vertical annulus, in which the inner cylinder maintains cold and fresh and the outer cylinder warm and salty. Results show that the double-diffusive layer may form through a successive generation of vortices induced by the interaction between the radial thermal and salinity gradients. The competition of the two gradients leads to three different types of double-diffusive instabilities: thermal, salt-finger, and diffusive. The axisymmetric mode is generally the most unstable, and its instability enhances when the annular gap width is larger. The non-axisymmetric mode becomes more stable for the annulus with a larger gap width, and its stability enhances when the mode has a smaller azimuthal wavelength. Finally, we show through a simulated experiment that the HDDL thickness is of a scale about the gap width. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/627614 | ISSN: | 0093-6413 | DOI: | 10.1016/j.mechrescom.2022.103991 |
顯示於: | 應用力學研究所 |
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