Enhanced Heat Transfer on Thermo Active Cooling Wall

Venko, Samo; Vidrih, Boris; Pavlovic, E.; Medved, Sašo

doi:10.5545/sv-jme.2012.436

Cited by 6 publications

(7 citation statements)

References 18 publications

(23 reference statements)

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“…In addition to the obvious academic interest, this configuration has relevance in various engineering systems (e.g. compact heat exchangers [8] and cooling systems [9,10], selective laser melting process [11]). Although quite some various different configurations of the enclosure problem are possible [12][13][14][15][16][17][18], one of the most studied cases involves the two-dimensional square enclosure with differentially heated isothermal vertical walls and adiabatic horizontal walls [19,20].…”

Section: Introductionmentioning

confidence: 99%

Conduction and convection heat transfer characteristics of water-based au nanofluids in a square cavity with differentially heated side walls subjected to constant temperatures

Ternik¹,

Rudolf

2014

THERM SCI

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The present work deals with the natural convection in a square cavity filled with the water-based Au nanofluid. The cavity is heated on the vertical and cooled from the adjacent wall, while the other two horizontal walls are adiabatic. The governing differential equations have been solved by the standard finite volume method and the hydrodynamic and thermal fields were coupled together using the Boussinesq approximation. The main objective of this study is to investigate the influence of the nanoparticles' volume fraction on the heat transfer characteristics of Au nanofluids at the given base fluid's (i.e. water) Rayleigh number. Accurate results are presented over a wide range of the base fluid Rayleigh number and the volume fraction of Au nanoparticles. It is shown that adding nanoparticles in a base fluid delays the onset of convection. Contrary to many authors, it was shown here that the use of nanofluids can reduce the heat transfer rate instead of increasing it.

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Section: Introductionmentioning

confidence: 99%

Conduction and convection heat transfer characteristics of water-based au nanofluids in a square cavity with differentially heated side walls subjected to constant temperatures

Ternik¹,

Rudolf

2014

THERM SCI

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“…Nu y dy L = ∫ (6) and relative enhancement of the heat transfer rate between the nanofluid (nf) and the base fluid (bf):…”

Section: Geometry and Boundary Conditionsmentioning

confidence: 99%

“…In addition to the obvious academic interest, this configuration has relevance in various engineering systems (e.g. compact heat exchangers [5] and cooling systems [6,7], selective laser melting process [8]). Although quite some various different configurations of the enclosure problem are possible, one of the most studied cases involves the twodimensional square enclosure with differentially heated isothermal vertical walls and adiabatic horizontal walls.…”

Section: Introductionmentioning

confidence: 99%

Laminar Natural Convection of Non-Newtonian Nanofluids in a Square Enclosure with Differentially Heated Side Walls

Ternik¹,

Rudolf²

2013

Int. j. simul. model.

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The present work deals with the laminar natural convection in a square cavity with differentially heated side walls subjected to constant temperatures and filled with homogenous 0,4 wt. % aqueous solution of carboxymethyl cellulose (CMC) based Au, Al 2 O 3 , Cu and TiO 2 nanofluids obeying the Power law rheological model. The governing differential equations have been solved by the standard finite volume method and the hydrodynamic and thermal fields are coupled together using the Boussinesq approximation.The main objective of this study is to investigate the influence of the nanoparticles' volume fraction (0 % ≤ φ ≤ 10 %) on the heat transfer characteristics of CMC based nanofluids over a wide range of nanofluid Rayleigh number (10 3 ≤ Ra nf ≤ 10 6 ). Accurate numerical results are presented in the form of dimensionless temperature and velocity variations, isotherms, mean Nusselt number and heat transfer enhancement. The results indicate clearly that the heat and momentum transfer characteristics are affected only by the nanofluid Rayleigh number, while the type of nanoparticles (i.e. thermo-phyisical properties) and their volume fraction have effect only on the heat transfer enhancement.

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“…Natural convection in nanofluids is one of the most extensively analyzed configurations because of its relevance in various engineering systems [5,6]. To date, most of the authors (e.g.…”

Section: Introductionmentioning

confidence: 99%

Laminar Forced Convection Heat Transfer Characteristics from a Heated Cylinder in Water Based Nanofluids

Ternik¹,

Rudolf²

2014

Int. j. simul. model.

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Forced convection heat transfer from a heated circular cylinder to incompressible water-based nanofluids in the steady cross-flow regime has been investigated numerically. The momentum and thermal energy differential equations have been solved by the standard finite volume method on the non-uniform Cartesian grid.The main objective of this study is to investigate the influence of the nanoparticles' volume fraction (0 % ≤ φ ≤ 10 %) on the heat transfer characteristics of water-based nanofluids over a wide range of base-fluid Reynolds number (1 ≤ Re bf ≤ 20).Accurate numerical results are presented in the form of the local and mean Nusselt number and the heat transfer enhancement. The results indicate clearly that the heat transfer characteristics are affected by the base-fluid Reynolds number, volume fraction and the thermo-physical properties of nanoparticles. Although those nanofluids reduce the mean Nusselt number values, they enhance the heat transfer rate.

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Enhanced Heat Transfer on Thermo Active Cooling Wall

Cited by 6 publications

References 18 publications

Conduction and convection heat transfer characteristics of water-based au nanofluids in a square cavity with differentially heated side walls subjected to constant temperatures

Conduction and convection heat transfer characteristics of water-based au nanofluids in a square cavity with differentially heated side walls subjected to constant temperatures

Laminar Natural Convection of Non-Newtonian Nanofluids in a Square Enclosure with Differentially Heated Side Walls

Laminar Forced Convection Heat Transfer Characteristics from a Heated Cylinder in Water Based Nanofluids

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