Double stratfied flow of nanofluid subject to temperature based thermal conductivity and heat source

Hayat, Tasawar; Ullah, Ikram; Alsaedi, Ahmed; Waqas, M.

doi:10.2298/tsci180121242h

Therm sci

2020

DOI: 10.2298/tsci180121242h

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Double stratfied flow of nanofluid subject to temperature based thermal conductivity and heat source

Tasawar Hayat

Ikram Ullah

Ahmed Alsaedi

et al.

Abstract: Stratified hydromagnetic flow of nanomaterial in the zone of stagnation point is addressed. An exponential base space dependent heat source, temperature dependent thermal conductivity and viscous dissipation are accounted. In addition, first order chemical reaction is present. The obtained non-linear system is computed by employing homotopic procedure. Convergent solutions are obtained. Plots and tabulated values are arranged for interpretation of sundry variables. Clearly temperature and concentration distrib… Show more

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Cited by 5 publications

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“…The governing problems are achieved via boundary-layer assumptions. Homotopic approach [32][33][34][35][36][37][38][39][40][41][42][43] is employed for the solutions of non-dimensional governing problems. Physics of sundry variables are studied graphically and for tabulated values.…”

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Mixed convective radiative flow of vicoelastic liquid subject to space dependent internal heat source and chemical reaction

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Original scientific paper https://doi.org/10.2298/TSCI171229287HPresent study addresses Soret and Dufour effects in mixed convection MHD flow of viscoelastic liquid with chemical reaction. Flow induced by an exponential stretching sheet is addressed in the presence of magnetic field. Energy expression is modelled by exponential space dependent internal heat source, thermal radiation, and convective condition. Relevant problems are modelled by employing boundary-layer concept. The partial differential systems are reduced to ordinary differential systems, and problem is solved by homotopic technique. Physical insight of results is arranged by graphs and tables. radiation in flow by an exponentially stretching surface. Flow of magneto second grade nanoliquid persuaded by an exponentially stretching sheet discussed by Hayat et al. [13].The respective mass/energy fluxes can be achieved by taking gradients of temperature/concentration. Thermal-diffusion (Soret effect) is generated because of temperature gradient while diffusion-thermo (Dufour effect) occurred due to concentration gradient. Such aspects have great implementation in area of chemical engineering and geosciences. Soret effect can be seen in solar ponds, micro-structure, and the biological systems of the world oceans. Thermal-diffusion is also utilized in process of isotope separation and in mixture between gases with small molecular weight (He, H 2 ) and of medium molecular weight (air, N 2 ). Related analysis in this direction have been mentioned by the studies [14][15][16][17][18].Excessive heat generation is a serious issue in engineering applications like nuclear power plants, concrete industry, computer processors and inside of earth. Effective heat transfer can drastically improve the effectiveness in such cases. There is most likely that heat transfer is very valuable in dilution technique, dialysis, oxygenation, and hyperthermia. Tissue engineering uses thermal excursion to selectively destroy tissues and cells. All these applications require heat transfer in the most proficient way by utilizing both free and forced convection which frequently supports mass transfer too. Heat and mass transfer through mixed convection is noticeable in processes like food solidification, diffusion of nutrients, reverse osmosis, cooling of nuclear reactors, float glass production cell separation, chemical waste management, cooling of combustion chamber wall in a gas defroster and turbine system. Many researchers admits the importance of involvement of mixed convection. Mixed convection in MHD viscoelastic fluid flow over a porous stretching sheet is analytically elaborated by Turkyilmazoglu [19]. Mixed convective boundary-layer flow over a convectively heated sheet is addressed by Grosan et al. [20]. The MHD mixed convective flow by an inclined porous plate with slip effect is discussed by Das et al. [21]. Imtiaz et al. [22] studied mixed convective nanofluid flow with Newtonian heating. Hayat et al.[23] studied mixed convection in 3-D flow of Sisko nanoliquid. Fur...

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Mixed convective radiative flow of vicoelastic liquid subject to space dependent internal heat source and chemical reaction

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Analysis of non-linear radiative stagnation point flow of Carreau fluid with homogeneous-heterogeneous reactions

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Dissipative flow of hybrid nanoliquid (H₂O-aluminum alloy nanoparticles) with thermal radiation

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An improvement in heat transfer fluid is one of the important tasks which can be achieved through implementation of hybrid nanoparticles. Hence the aim of this study is to communicate flow of hybrid nanoliquid by stretchable rotating disk. The considered hybrid nanoliquid is a combination of AA7072 and AA7075 nanoparticles and water. Law of energy incorporates the thermal radiation, dissipation and irregular heat source terms. Von Karman variables lead to the dimensionless problem under consideration. Reduced system is tackled numerically via NDSolve based Shooting scheme. Graphical descriptions are made against various physical variables of interest. Moreover rate of heat transfer at disk is estimated. Present work pointed out that local heat transfer rate accelerates for higher thermal radiation and thermal slip parameters whereas decaying trend is seen for higher estimations of Eckert number and (ESHS) parameter. It is noted that fluid velocity reduces for higher volumetric fraction. Furthermore hybrid nanomaterials have great influence throughout our analysis when compared with regular nanomaterials. The peculiar outcomes achieved in this study are important in industrial research, academics and discussion about heat transfer analysis in flow of two types of nanoliquids by keeping the regular fluid fixed. Finally key points of present analysis are included.

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Double stratfied flow of nanofluid subject to temperature based thermal conductivity and heat source

Cited by 5 publications

References 45 publications

Mixed convective radiative flow of vicoelastic liquid subject to space dependent internal heat source and chemical reaction

Mixed convective radiative flow of vicoelastic liquid subject to space dependent internal heat source and chemical reaction

Analysis of non-linear radiative stagnation point flow of Carreau fluid with homogeneous-heterogeneous reactions

Dissipative flow of hybrid nanoliquid (H₂O-aluminum alloy nanoparticles) with thermal radiation

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Double stratfied flow of nanofluid subject to temperature based thermal conductivity and heat source

Cited by 5 publications

References 45 publications

Mixed convective radiative flow of vicoelastic liquid subject to space dependent internal heat source and chemical reaction

Mixed convective radiative flow of vicoelastic liquid subject to space dependent internal heat source and chemical reaction

Analysis of non-linear radiative stagnation point flow of Carreau fluid with homogeneous-heterogeneous reactions

Dissipative flow of hybrid nanoliquid (H2O-aluminum alloy nanoparticles) with thermal radiation

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Dissipative flow of hybrid nanoliquid (H₂O-aluminum alloy nanoparticles) with thermal radiation