Investigation of boiling heat transfer of titania nanofluid flowing through horizontal tube and optimization of results utilizing the desirability function approach

Dadhich, Manish; Prajapati, Om Shankar; Sharma, Vikas

doi:10.1016/j.powtec.2020.09.077

Cited by 14 publications

(6 citation statements)

References 26 publications

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“…The number of nodes and elements was ( 859625) and ( 1976913), respectively, with an error of about 0.754 % in ANSYS-FLUENT. The gained results are tabulated in Table (6) and Figure (5).…”

Section: Mesh Generation and Grid Independencementioning

confidence: 99%

“…The research trend is significantly changing towards nano fluids applications in the heat transfer systems due to limitations on future development in the thermos-physical characteristics of traditional working fluids [4]. The term "nanofluid" refers to a mixture of metallic and nonmetallic nanoparticles distributed in water, oils, and other base fluids [5]. Choi [6] created the term nanofluid in 1995, describing a fixed solution of a limited number of extremely tiny particles ranging from 1 nm to 100 nm.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Investigation of Heat Transfer Enhancement by Hybrid Nanofluid and Twisted Tape

Hamza¹,

Aljabair²

2022

ETJ

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 Hybrid nanofluid in a tube with a typical inserted twisted tape has been investigated experimentally and numerically.  The most important basic dimensionless parameters, including Reynolds number, Nusselt number, and Friction factor, have been studied.  The results proved that there is a noticeable improvement in heat transfer in the presence of a typical inserted twisted tape.This paper presents an experimental and numerical study to investigate the heat transfer enhancement in a horizontal circular tube using hybrid nanofluid (CuO, Al₂O₃/ distilled water) and fitted with twisted tape (typical twisted tape, with twist ratios (TR=9.2). Under fully developed turbulent flow and uniform heat flux conditions, the studied hybrid nanofluid concentrations are (=0.6, 1.22, and 1.8% by volume). The experimental test rig includes all the required instruments to study the heat transfer enhancement. All the tests were carried out with a Reynolds number range of 3560-8320 and uniform heat flux (13217.5 W/m². The twisted tape, manufactured from polylactic acid (PLA) by 3-dimensional printer technology, was inserted inside the tube. In this numerical study, the finite volume method (CFD) procedure was employed to pattern the forced convection turbulent flow through the tube. For hybrid nanofluid with twisted, the maximum enhancement in the maximum thermal performance factor was 2.18 for φ = 1.8%, while for a tube (water with twisted) under the same conditions, it was (2.04). A high Nusselt number was obtained with a concentration of 1.8% and an enhancement in the heat transfer of about 6.70%) than water.

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“…The number of nodes and elements was ( 859625) and ( 1976913), respectively, with an error of about 0.754 % in ANSYS-FLUENT. The gained results are tabulated in Table (6) and Figure (5).…”

Section: Mesh Generation and Grid Independencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of Heat Transfer Enhancement by Hybrid Nanofluid and Twisted Tape

Hamza¹,

Aljabair²

2022

ETJ

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“…При пересчёте по данной формуле не учитываются коэффициенты весомости частных показателей, которые объединяются в обобщенную функцию желательности Харрингтона (D) путём определения средних геометрических частных желательностей (d u ) [20][21][22][23].…”

Section: статистический анализunclassified

Application of Multivariate Anova and Generalized Desirability to Optimize the Composition and Technology of Tablets Containing N-Benzyl-N-Methyl-1-Phenylpyrrolo [1,2-A] Pyrazine-3-Carboxamide

Tishkov

Blynskaya

Alekseev

et al. 2022

Farm. farmakol. (Pâtigorsk)

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The creation of drugs with an anxiolytic activity, which do not have the main side effects characteristic of drugs of this group, is an important and socially significant task. For its implementation, within the framework of the development of an original drug with an anxiolytic activity, the composition and manufacturing of GML-1 tablets (N-benzyl-N-methyl-1-phenylpyrrolo [1,2-a] pyrazine-3-carboxamide) are being developed.The aim of this article is to study, using a four-factor analysis of variance, the influence of composition factors on the manufacturing properties of GML-1 tablets and the selection of the type, the amount, stage of the disintegrant addition and the type of lubricating excipients used in the technology of wet granulation of GML-1 tablets.Materials and methods. The materials used are: the substance – GML-1 (N-benzyl-N-methyl-1-phenylpyrrolo [1,2-a] pyrazine-3-carboxamide). Excipients: microcrystalline cellulose 101 (MCC 101); polyvinylpyrrolidone (PVP); crospovidone, croscarmellose sodium (CCS), sodium starch glycolate (SSG); magnesium stearate (MS), sodium stearyl fumarate (SSF). To obtain tablet mixtures, wet granulation and tableting with the study of their main pharmaceutical and technological properties was used.Results. Model compositions were developed and their pharmaceutical and technological properties were studied. These results have been analyzed, the degree of these factors’ influence and their interactions have been determined. In most of the cases considered, the interactions of the factors did not cause a significant change in the optimization criteria. With an increase in the amount of a disintegrant, the disintegration time decreased unevenly, so an increase in the amount of these excipients from 4 to 6 mg had a stronger effect than from 2 to 4 mg. Factor B affected the release degree non-linearly. Factor A influenced all the optimization criteria considered, especially a PS release. The best release and disintegration were observed with crospovidone, which was of a particular importance when processing the test results using a generalized desirability method.Conclusion. In view of the conflicting variance analysis results, for particular factors, the resulting values were additionally analyzed using the generalized desirability function. The use of this method made it possible to reduce the conflicting variance analysis results to the most optimal composition.

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“…Currently, energy saving in thermal systems has grabbed considerable attention to reduce the heat losses and improve the heat transfer performance [1]. Due to restrictions on the further improvement in the thermophysical properties of conventional working fluids, the research trend is drastically shifting towards nanofluids applications in heat transfer systems [2].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations on Heat Transfer Characteristics of Single Particle and Hybrid Nanofluids in Uniformly Heated Tube

Garud

Lee

2021

Symmetry

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In the present study, the heat transfer characteristics, namely, heat transfer coefficient, Nusselt number, pressure drop, friction factor and performance evaluation criteria are evaluated for water, Al2O3 and Al2O3/Cu nanofluids. The effects of Reynolds number, volume fraction and composition of nanoparticles in hybrid nanofluid are analyzed for all heat transfer characteristics. The single particle and hybrid nanofluids are flowing through a plain straight tube which is symmetrically heated under uniform heat flux condition. The numerical model is validated for Nusselt number within 7.66% error and friction factor within 8.83% error with corresponding experimental results from the previous literature study. The thermophysical properties of hybrid nanofluid are superior to the single particle nanofluid and water. The heat transfer coefficient, Nusselt number and pressure drop show increasing trend with increase in the Reynolds number and volume fraction. The friction factor shows the parabolic trend, and the performance evaluation criteria shows small variations with change in Reynolds number. However, both friction factor and performance evaluation criteria have increased with increase in the volume fraction. The 2.0% Al2O3/Cu with equal composition of both nanoparticles (50/50%) have presented superior heat transfer characteristics among all working fluids. Further, the heat transfer characteristics of 2.0% Al2O3/Cu hybrid nanofluid are enhanced by changing the nanoparticle compositions. The performance evaluation criteria for 2.0% Al2O3, 2.0% Al2O3/Cu (50/50%), 2.0% Al2O3/Cu (75/25%) and 2.0% Al2O3/Cu (25/75%) are evaluated as 1.08, 1.11, 1.10 and 1.12, respectively.

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Investigation of boiling heat transfer of titania nanofluid flowing through horizontal tube and optimization of results utilizing the desirability function approach

Cited by 14 publications

References 26 publications

Numerical and Experimental Investigation of Heat Transfer Enhancement by Hybrid Nanofluid and Twisted Tape

Numerical and Experimental Investigation of Heat Transfer Enhancement by Hybrid Nanofluid and Twisted Tape

Application of Multivariate Anova and Generalized Desirability to Optimize the Composition and Technology of Tablets Containing N-Benzyl-N-Methyl-1-Phenylpyrrolo [1,2-A] Pyrazine-3-Carboxamide

Numerical Investigations on Heat Transfer Characteristics of Single Particle and Hybrid Nanofluids in Uniformly Heated Tube

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