Turbulent natural convection combined with entropy generation in a nanofluid cavity with non-uniformly heated side walls
The two-dimensional turbulent natural convection and entropy generation within an alumina-water nanoliquid chamber in the presence of sinusoidal temperature profiles at vertical walls is calculated. The considered process has been modelled using the RANS (Reynoldsaveraged Navier-Stokes) approach for...
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Published in | Journal of physics. Conference series Vol. 1366; no. 1; pp. 12049 - 12054 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Bristol
IOP Publishing
01.11.2019
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Subjects | |
Online Access | Get full text |
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Summary: | The two-dimensional turbulent natural convection and entropy generation within an alumina-water nanoliquid chamber in the presence of sinusoidal temperature profiles at vertical walls is calculated. The considered process has been modelled using the RANS (Reynoldsaveraged Navier-Stokes) approach for turbulent regime and Boussinesq approximation for the buoyancy force. The control equations written using the non-dimensional stream function, vorticity and temperature variables combined with parameters of standard κ-ε turbulence model have been solved by the finite difference method with non-uniform computational mesh. The special algebraic transformation has been used for an introduction of the non-uniform mesh in physical domain. The influence of the nano-sized particles concentration and Rayleigh number on the nanofluid circulation and energy transport patterns has been examined. |
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ISSN: | 1742-6588 1742-6596 |
DOI: | 10.1088/1742-6596/1366/1/012049 |