Comparative study of Euler and mixture models for turbulent flow of Al2O3 nanofluid inside a horizontal tube

Hejazian, Majid; Moraveji, Mostafa Keshavarz; Beheshti, Alireza

doi:10.1016/j.icheatmasstransfer.2014.01.022

Cited by 100 publications

(35 citation statements)

References 21 publications

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“…The good prediction of the mixture model in nanofluid problems was proved by several previous works [17][18][19][20][21][22]. It was illustrated that the homogenous and Eulerian models underestimate Nusselt number in comparison with the available experimental data [20,22].…”

Section: Governing Equationsmentioning

confidence: 71%

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Khoshvaght-Aliabadi

Sadri

Hormozi

2016

Journal of the Taiwan Institute of Chemical Engineers

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Section: Governing Equationsmentioning

confidence: 71%

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Khoshvaght-Aliabadi

Sadri

Hormozi

2016

Journal of the Taiwan Institute of Chemical Engineers

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“…The good prediction of the mixture model in nanofluid problems was proved by several previous works [21][22][23][24][25][26]. Hence in the present work, the mixture model is adopted by assuming that the coupling between phases is strong, and particles closely follow the flow.…”

Section: Governing Equations and Boundary Conditionsmentioning

confidence: 77%

Influence of Al 2 O 3 –H 2 O nanofluid on performance of twisted minichannels

Khoshvaght-Aliabadi

Arani

Rahimpour

2016

Advanced Powder Technology

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“…Considering nanoparticles as a secondary phase in flow has been investigated by some researchers [10,11]. The multiphase model employed in most nanofluid studies is Mixture model from Eulerian-Eulerian approach which is relied more on nanofluid thermophysical properties gained by empirical correlations.…”

Section: Introductionmentioning

confidence: 99%

CFD modelling of heat transfer and pressure drops for nanofluids through vertical tubes in laminar flow by Lagrangian and Eulerian approaches

Mahdavi

Sharifpur

Meyer

2015

International Journal of Heat and Mass Transfer

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Nanofluids consist of liquid and solid (nanoparticles), therefore, they can be classified as two-component flow, which brings up different approaches for simulation purposes. In this study, heat transfer and hydro-dynamic features of nanoparticles in a laminar nanofluid flow in a vertical tube are investigated numerically via Lagrangian and Eulerian approaches.Discrete Phase Model (DPM) in Lagrangian approach simulates the motion of particles through base flow with force balance equation, therefore, no needs empirical correlations at least for the thermo-physical properties (which they are not universal and change for different fluids and/or nanoparticles). Although, general empirical or analytical correlations are needed for some interactions between solid and liquid such as Thermophoresis, Brownian and clustering effects, but they are not that extensive and can be employed in most of the cases.Mixture model in Eulerian approach provides more reliable results, but it highly depends on the accuracy of the correlations for the thermo-physical properties of the nanofluid. In present study, three common types of nanofluids consist of Alumina, Zirconia and Silica nanoparticles (up to 2.76% of volume fraction) are studied and the results are compared with experimental works. Numerical simulations indicate that the findings are in good agreement with the measured heat transfer coefficient for DPM. Consequently, DPM can be highly recommended for simulation study due to the strength and simplicity. It has been also observed that the effects of nanoparticles in each computational cell need to be distributed to the other neighbourhood cells. Pressure losses results predicted by DPM were found reliable for volume fraction less than 3%, no matter the types of nanoparticles or diameter. DPM velocity profiles show that the slip velocity between nanoparticles and base flow is not negligible.

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Comparative study of Euler and mixture models for turbulent flow of Al2O3 nanofluid inside a horizontal tube

Cited by 100 publications

References 21 publications

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Influence of Al 2 O 3 –H 2 O nanofluid on performance of twisted minichannels

CFD modelling of heat transfer and pressure drops for nanofluids through vertical tubes in laminar flow by Lagrangian and Eulerian approaches

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