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- W2141348488 abstract "Abstract Experimental results for instabilities present in a rotating Hagen–Poiseuille flow are reported in this study through fluid flow visualization. First, we found a very good agreement between the experimental and the theoretical predictions for the onset of convective hydrodynamic instabilities. Our analysis in a space–time domain is able to obtain quantitative data, so the wavelengths and the frequencies are also estimated. The comparison of the predicted theoretical frequencies with the experimental ones shows the suitability of the parallel, spatial and linear stability analysis, even though the problem is spatially developing. Special attention is focused on the transition from convective to absolute instabilities, where we observe that the entire pipe presents wavy patterns, and the experimental frequencies collapse with the theoretical results for the absolute frequencies. Thus, we provide experimental evidence of absolute instabilities in a pipe flow, confirming that the rotating pipe flow may be absolutely unstable for moderate values of Reynolds numbers and low values of the swirl parameter." @default.
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- W2141348488 date "2013-01-28" @default.
- W2141348488 modified "2023-10-04" @default.
- W2141348488 title "Experimental evidence of convective and absolute instabilities in rotating Hagen–Poiseuille flow" @default.
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- W2141348488 doi "https://doi.org/10.1017/jfm.2012.600" @default.
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