Enhanced heat transfer due to curvature-induced lateral vortices in laminar flows in sinusoidal corrugated-plate channels

Metwally, Hossam; Manglik, Raj M.

doi:10.1016/j.ijheatmasstransfer.2003.11.019

Cited by 191 publications

(65 citation statements)

References 27 publications

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“…Manglik [11] studied the impact of the corrugation depth and the Reynolds number on the thermohydraulics of sinusoidal wavy fins. For very low Re or very low corrugation aspect ratio γ (ratio of the amplitude to the wavelength) the surface geometry has no effect on the flow and the fluid moves undisturbed through the channel without any recirculation.…”

Section: Main Flow Manipulationmentioning

confidence: 99%

“…At higher Re the data diverges away from these regimes as the friction factor and Nu number increase. By considering the wall shear stress and heat flux distributions Metwally and Manglik [11] argued that the flow can be categorized into two distinct regimes: (1) an undisturbed streamline flow regime and (2) a steady swirl flow regime that is characterized by self-sustained transverse vortices in the troughs. Rush et al [12] visualized these vortices and the resulting macroscopic mixing using dye injection in scaled up models.…”

Section: Main Flow Manipulationmentioning

confidence: 99%

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Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

T’Joen¹,

Huisseune²,

Canière³

et al. 2011

International Journal of Heat and Mass Transfer

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In this study the inclined louvered fin, a hybrid fin design based on the slit fin and louvered fin design is considered. The goal of the research program is to investigate the interaction between the flow behaviour (flow deflection and transition to unsteady flow) and the thermo-hydraulics of the fin design. This approach was selected in order to reveal the flow physics behind the transitions found in the thermo-hydraulic data.

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Section: Main Flow Manipulationmentioning

confidence: 99%

Section: Main Flow Manipulationmentioning

confidence: 99%

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

T’Joen¹,

Huisseune²,

Canière³

et al. 2011

International Journal of Heat and Mass Transfer

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show abstract

“…Due to the broad range of application of this heat transfer equipment, several experimental and modelling works have been performed in order to study the thermal and hydraulic performance of different plate patterns, fouling tendency, corrosion mechanisms and the optimization of different arrangements and configurations, when leading with Newtonian or non-Newtonian fluids (Afonso et al, 2003;Antonini, François, & Shuai, 1987;Bassiouny & Martin, 1984;Delplace & Leuliet, 1995;Gut & Pinto, 2003a, 2003bKho & Mü ller-Steinhagen, 1999;Leuliet, Maigonnat, & Lalande, 1987, 1988, 1990Mehrabian & Poulter, 2000;Metwally & Manglick, 2004;Stasiek, Collins, Ciofalo, & Chew, 1996).…”

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Fernandes

Dias

Nóbrega

et al. 2006

Journal of Food Engineering

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In this study, CFD calculations were made in order to analyse the thermal behaviour of yoghurt in a plate heat exchanger, the yoghurt viscosity being described by a Herschel-Bulkley model.The influence of Reynolds number on local Nusselt numbers was analysed as well as the influence of entry effects on average Nusselt number. Numerical runs considering and discarding the influence of temperature on the viscosity were performed and the impact on average Nusselt numbers was analysed. Transversal variations of viscosity were studied and thermal correlations including the ratio between bulk and wall viscosities are proposed.The obtained thermal correlations were compared with the experimental ones (described in the literature) and a very good agreement was found, mainly when considering the effect of temperature on viscosity. Simulations with a non-Newtonian fluid having lower Prandtl numbers than yoghurt were performed in order to analyse the influence of this variation on the Reynolds number exponent of the thermal correlation.

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“…1(B)), mainly due to the common shear-thinning phenomenon in the pseudoplastic fluid. 57 The power law model is employed to correlate the shear rate and shear stress, Eq (1) 63 :…”

Section: A Rheological Behaviors Of Epoxy Resin Nanosuspensionsmentioning

confidence: 99%

Magnetic epoxy nanocomposites with superparamagnetic MnFe2O4 nanoparticles

et al. 2015

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Manganese iron oxide (MnFe2O4) nanoparticles successfully served as nanofillers for obtaining magnetic epoxy nanocomposites. The viscosities of MnFe2O4/epoxy resin liquid suspensions increased with increasing the nanoparticles loading except the suspension with 5.0 and 1.0 wt% loading, whose viscosities were lower than that of pure epoxy. The introduction of MnFe2O4 nanoparticles showed a lower onset decomposition temperature and glass transition temperature (Tg), which decreased with increasing the nanoparticles loading. The storage modulus and tensile strength of 1.0 wt% MnFe2O4/epoxy were a little higher than that of pure epoxy. The coercivity of MnFe2O4/epoxy nanocomposites with 5.0 wt% (44.7 Oe) and 10.0 wt% (43.9 Oe) displayed much higher than that of pure MnFe2O4 nanoparticles (14.94 Oe). The magnetic moment (m) of nanocomposites (1.354 μB for 10 wt% MnFe2O4/epoxy) are higher than that of pure MnFe2O4 nanoparticles (1.244 μB). The increased real permittivity observed in the nanocomposites was attributed to the interfacial polarization. The intrinsic permittivity of the MnFe2O4 nanoparticles was also calculated.

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Enhanced heat transfer due to curvature-induced lateral vortices in laminar flows in sinusoidal corrugated-plate channels

Cited by 191 publications

References 27 publications

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

Thermal behaviour of stirred yoghurt during cooling in plate heat exchangers

Magnetic epoxy nanocomposites with superparamagnetic MnFe2O4 nanoparticles

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