Is the critical Reynolds number universal? |
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Authors: | S Novopashin A Muriel |
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Institution: | (1) Institute of Thermophysics, Russian Academy of Sciences, Novosibirsk, 630090, Russia |
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Abstract: | This paper is devoted to checking whether the critical Reynolds number is universal in identical conditions for the flow of different fluids. The laminar-turbulent transition in a circular pipe flow has been tested experimentally. The flows of inert gases (He, Ne, Ar, Kr, Xe), molecular gases (N2, CO, CO2, SF6), and two similar liquids (H2O, D2O) have been tested. A considerable, up to 40%, difference in critical Reynolds numbers was observed. The possible reasons for nonuniversality of the critical Reynolds number are discussed. |
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