Experimental study on the characteristics of heat transfer and flow resistance in turbulent pipe flows of viscoelastic-fluid-based Cu nanofluid

Yang, Juan-Cheng; Li, Feng-Chen; He, Yurong; Huang, Yimin; Jiang, Baocheng

doi:10.1016/j.ijheatmasstransfer.2013.02.074

Cited by 43 publications

(24 citation statements)

References 27 publications

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“…heat transfer rate is increased with the increase of nanoparticles volume fraction (VFBN1-N, VFBN2-N and VFBN3-N) and increased with the increase of Reynolds number (VFBN5-N, VFBN4-N and VFBN3-N). These simulation results show good agreements with our previous experimental results [35] and can capture the main characteristics of BF, NF, VBF and VFBN. Therefore, we can conclude that our simulation method in the present paper is correct and the following analyses based on simulation results are feasible.…”

Section: Overall Performance Of the Viscoelastic Fluid Base Nanofluidsupporting

confidence: 88%

“…Some other detailed information of the phase diagram has been illustrated in the previous publication and can be seen in ref. [35], thus not repeats here.…”

Section: Overall Performance Of the Viscoelastic Fluid Base Nanofluidmentioning

confidence: 86%

“…The simulation cases and its physical properties which derived from our previous experiments [34,35] are list in Table 1. It should be noted that the physical properties of fluid have been transformed into some non-dimensional parameters such as Re, We, Pr and β in order to be substituted in the governing equation in the present simulation.…”

Section: Simulation Casesmentioning

confidence: 99%

“…Our previous experimental results and numerical simulation results have proved that the VFBN (the aqueous solution of CTAC/sodium salicylate (NaSal) system is used as viscoelastic base fluid, copper is used as nanoparticles) can realize the flow drag reduction effects compared with traditional nanofluid and the heat transfer enhancement compared with viscoelastic fluid. Some detailed experimental results and simulation results of VFBN can be seen in our previous publications [35][36][37][38][39]. Following the similar analysis procedure of nanofluid used by FSP, it is also valuable to investigate the synergy between the velocity filed and temperature gradient filed of VFBN under turbulent flow state.…”

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Analysis of heat transfer performance for turbulent viscoelastic fluid-based nanofluid using field synergy principle

Yang

et al. 2015

Sci. China Technol. Sci.

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In this paper, the field synergy principle is firstly performed on the viscoelastic fluid-based nanofluid and other relevant fluid in channel at turbulent flow state to scrutinize their heat transfer performance based on our direct numerical simulation database. The cosine values of intersection angle between velocity vector and temperature gradient vector are calculated for different simulated cases with varying nanoparticle volume fraction, nanoparticle diameter, Reynolds number and Weissenberg number. It is found that the filed synergy effect is enhanced when the nanoparticle volume fraction is increased, nanoparticle diameter is decreased and Weissenberg number is decreased, i.e. the heat transfer is also enhanced. However, the filed synergy effect is weakened with the increase of Reynolds number which may be the possible reason for the power function relationship in empirical correlation of heat transfer between heat transfer performance and Reynolds number with the constant power exponent lower than 1. Finally, it is also observed that the field synergy principle can be used to analyze the heat transfer process of viscoelastic fluid-based nanofluid at the turbulent flow state even if some negative cosine values of intersection angle exist in the flow field. viscoelastic fluid-based nanofluid, filed synergy principle, intersection angle, turbulent drag reduction, heat transfer enhancement Citation:Yang J C, Li F C, Ni M J, et al. Analysis of heat transfer performance for turbulent viscoelastic fluid-based nanofluid using field synergy principle.

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Section: Overall Performance Of the Viscoelastic Fluid Base Nanofluidsupporting

confidence: 88%

“…Some other detailed information of the phase diagram has been illustrated in the previous publication and can be seen in ref. [35], thus not repeats here.…”

Section: Overall Performance Of the Viscoelastic Fluid Base Nanofluidmentioning

confidence: 86%

Section: Simulation Casesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Analysis of heat transfer performance for turbulent viscoelastic fluid-based nanofluid using field synergy principle

Yang

et al. 2015

Sci. China Technol. Sci.

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“…Yang et al [189] performed experiments on heat transfer and flow resistance using viscoelastic-fluid-based Copper (Cu) nanofluid. The viscoelastic-based-fluid (VBF) used was CTAC/Sodium Salicylate (NaSaI) with mass concentration of 600 and 1,200 ppm.…”

Section: Potential Research Area: Addition Of Drag Reducing Additivesmentioning

confidence: 99%

Reviews on drag reducing polymers

Tiong

Perumal

2015

Korean J. Chem. Eng.

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Polymers are effective drag reducers owing to their ability to suppress the formation of turbulent eddies at low concentrations. Existing drag reduction methods can be generally classified into additive and non-additive techniques. The polymer additive based method is categorized under additive techniques. Other drag reducing additives are fibers and surfactants. Non-additive techniques are associated with the applications of different types of surfaces: riblets, dimples, oscillating walls, compliant surfaces and microbubbles. This review focuses on experimental and computational fluid dynamics (CFD) modeling studies on polymer-induced drag reduction in turbulent regimes. Other drag reduction methods are briefly addressed and compared to polymer-induced drag reduction. This paper also reports on the effects of polymer additives on the heat transfer performances in laminar regime. Knowledge gaps and potential research areas are identified. It is envisaged that polymer additives may be a promising solution in addressing the current limitations of nanofluid heat transfer applications.

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Influence of temperature and inhibitor content on the lifetime of copper nanoparticles in a propylene glycol‐based nanofluid

Stoulil

Pfeifer

Švadlena

et al. 2015

Materials & Corrosion

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The present paper investigated the lifetime of copper nanoparticles in a propylene glycol-based nanofluid. The corrosion behavior of nanoparticles was observed by means of linear polarization resistance, resistometry, transmission electron microscopy, and X-ray photoelectron spectroscopy. Copper nanoparticles were tested in pure propylene glycol with the addition of the inhibitors benztriazole, benzimidazole, and tolyltriazole. The best performance was found with tolyltriazole as it provided some inhibiting efficiency even at higher temperatures, i.e., up to 120 8C. A layer of cuprous oxide was observed on the surface after exposure to propylene glycol, but this oxide was defective on the curved surface of nanoparticles. The corrosion rate of nanoparticles was at least two orders of magnitude greater than the corrosion rate of the compact sample. The lifetime of bare copper nanoparticles was not sufficient for practical purposes even when an inhibitor was used.

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Experimental study on the characteristics of heat transfer and flow resistance in turbulent pipe flows of viscoelastic-fluid-based Cu nanofluid

Cited by 43 publications

References 27 publications

Analysis of heat transfer performance for turbulent viscoelastic fluid-based nanofluid using field synergy principle

Analysis of heat transfer performance for turbulent viscoelastic fluid-based nanofluid using field synergy principle

Reviews on drag reducing polymers

Influence of temperature and inhibitor content on the lifetime of copper nanoparticles in a propylene glycol‐based nanofluid

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