Experimental investigation of the critical Reynolds number for bubbly two-phase flow
| Autor: | Marshall C. MCCRAY, Paul G. A. CIZMAS |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | INCAS Bulletin, Vol 15, Iss 3, Pp 47-55 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2066-8201 2247-4528 |
| DOI: | 10.13111/2066-8201.2023.15.3.4 |
| Popis: | The critical Reynolds number for dispersed bubbly two-phase flows, gas in liquid, was experimentally investigated. In this experiment, the gas was air and the liquid was water. Water flowed upward through a vertical, translucent pipe, and air was introduced into the water prior to the test section by means of a basswood microbubbler. Dye was injected into the water to indicate when the flow transitioned from laminar to turbulent. Mixtures with gas volume fractions up to 10% were tested, and the Reynolds numbers for which the flow transitioned from laminar to turbulent were recorded. The data showed that the critical Reynolds number fell to roughly one-half of its original single-phase liquid value once the gas volume fractions exceeded 0.1%. These results indicate that the presence of even small amounts of bubbles causes pre-mature transition to turbulence. |
| Databáze: | Directory of Open Access Journals |
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