Dynamic behavior of temperature field in a buoyancy-driven turbulent fire |
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| Authors: | Kazushi Takagi Hiroshi Gotoda Isao T. Tokuda Takaya Miyano |
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| Affiliation: | 1. Department of Mechanical Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, 125-8585, Japan;2. Department of Mechanical Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan |
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| Abstract: | We study the dynamic behavior of temperature field in a buoyancy-driven turbulent fire from the viewpoints of symbolic dynamics, complex networks, and statistical complexity. The permutation entropy and the horizontal visibility network entropy allow us to capture the subtle changes in temperature fluctuations. The possible existence of deterministic chaos in temperature fluctuations, as well as in streamwise flow velocity fluctuations [Takagi et al., Phys. Rev. E 96 (2017) 052223], is clearly verified using the multiscale complexity-entropy causality plane. |
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| Keywords: | Time series analysis Symbolic dynamics Complexity Complex networks Combustion |
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