Assessment of the local thermal non-equilibrium condition for nanofluid flow through porous media: a comparative analysis

This investigation aims to scrutinize the general criterion for local thermal non-equilibrium (LTNE) and to focus on the influence of nanoparticles (AA7075 and Cu) in the base fluids (methanol and NaAlg) by employing the Tiwari–Das model. The heat transfer features of a nanoliquid flow over a stretc...

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Bibliographic Details
Published inIndian journal of physics Vol. 96; no. 8; pp. 2475 - 2483
Main Author Prasannakumara, B. C.
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 01.07.2022
Springer Nature B.V
Subjects
Aluminum base alloys
Astrophysics and Astroparticles
Equilibrium conditions
Fluid flow
Friction factor
Heat transfer
Mathematical models
Methanol
Nanofluids
Nanoparticles
Original Paper
Parameter modification
Physics
Physics and Astronomy
Porosity
Porous media
Runge-Kutta method
Solid phases
Local thermal non-equilibrium
Stretching sheet
Nanofluid
Porous medium
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Summary:This investigation aims to scrutinize the general criterion for local thermal non-equilibrium (LTNE) and to focus on the influence of nanoparticles (AA7075 and Cu) in the base fluids (methanol and NaAlg) by employing the Tiwari–Das model. The heat transfer features of a nanoliquid flow over a stretching sheet in a porous medium are investigated numerically in terms of parameters of engineering interest. The system of modelled equations is reduced by using suitable similarity transformations, which are then tackled numerically by using the Runge–Kutta–Fehlberg (RKF) process with shooting technique. The influence of numerous controlling pertinent parameters on velocity, thermal field, friction factor and Nusselt number for fluid and solid matrix phase is discussed graphically. It is concluded that the velocity of the NaAlg–Cu nanoliquid is strongly stimulated by growing values of porosity parameter. The fluid and solid-phase thermal profiles of Methanol-AA7075 nanoliquid are strongly stimulated by increasing porosity-modified conductivity ratio parameter values. An upsurge in the inter-phase heat transfer parameter led to growth in the heat transfer rate of the solid phase but decreased the heat transfer rate of the fluid phase.
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ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-021-02216-9