Mixed convective flow stability of nanofluids past a square cylinder by dynamic mode decomposition

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• 作者：S ; ip Sarkar ; Suvankar Ganguly ; Amaresh Dalal ; Pankaj Saha ; Suman Chakraborty
• 关键词：Nanofluids ; Square cylinder ; DMD ; Mixed convection ; Finite element method
• 刊名：International Journal of Heat and Fluid Flow
• 出版年：December, 2013
• 年：2013
• 卷：44
• 期：Complete
• 页码：624-634
• 全文大小：1295 K

文摘

The mixed convective flow stability of nanofluids past a square cylinder is investigated by Dynamic Mode Decomposition (DMD). The energy content in the individual modes for Cu-water nanofluids is found to be higher than that of Al₂O₃-water nanofluids. DMD results showed the fact that Cu-water nanofluids have more small-scale structures of higher frequency modes compared to that of Al₂O₃-water nanofluids. The most dominant temporal dynamic mode corresponds to the lower-frequency eigenvalue for Al₂O₃-water nanofluids and for Cu-water nanofluids. Energy content in the mean flow of the base fluid at Richardson number of 鈭?.5 is found to be maximum compared to that of nanofluids.