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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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1366; no. 1; pp. 12049 - 12054
Main Authors Pop, I, Sheremet, M A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2019
Subjects
Aluminum oxide
Boussinesq approximation
Computational fluid dynamics
Computational grids
Entropy
Finite difference method
Finite element method
Free convection
Nanofluids
Physics
Temperature profiles
Turbulence models
Turbulent flow
Vorticity
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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.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1366/1/012049