Vortex-induced vibration of a cylinder in pulsating nanofluid flow
| Autor: | Y. Amini, Saeed Akhavan, Ehsan Izadpanah |
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| Rok vydání: | 2019 |
| Předmět: |
Damping ratio
Materials science Reynolds number 02 engineering and technology Mechanics Wake 021001 nanoscience & nanotechnology Condensed Matter Physics Vortex shedding 01 natural sciences 010406 physical chemistry 0104 chemical sciences Physics::Fluid Dynamics Vibration symbols.namesake Nanofluid Vortex-induced vibration Heat transfer symbols Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 140:2143-2158 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | In this paper, vortex-induced vibration of a circular cylinder with forced convection heat transfer and entropy generation in pulsating alumina–water nanofluid flow is investigated numerically. Numerical simulation is carried out for a constant mass ratio of 2 and damping ratio of 0.01 at a fixed Reynolds number of 150. The ranges of reduced velocity, particle volume fraction and inlet velocity oscillation amplitude are 3–8, 0–5% and 0–1, respectively. It was found that the lock-in phenomenon, nanofluid concentration and inlet velocity oscillation amplitude have an effective role in increasing heat transfer and decreasing entropy generation. Two wake patterns (2S and 2P) were observed in the present simulation. For velocity oscillation amplitude of 1, the transition from 2S to 2P modes occurs in vortex shedding pattern. |
| Databáze: | OpenAIRE |
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