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Journal ArticleDOI

Entropy analysis of a hydromagnetic micropolar dusty carbon NTs-kerosene nanofluid with heat generation: Darcy–Forchheimer scheme

01 Feb 2021-Journal of Thermal Analysis and Calorimetry (Springer International Publishing)-Vol. 143, Iss: 3, pp 2419-2436
TL;DR: In this article, carbon nanotubes suspended magnetohydrodynamics micropolar dusty nanofluid impinging on a permeable extending sheet placed in a porous regime is taken into account.
Abstract: The current paper on carbon nanotubes suspended magnetohydrodynamics micropolar dusty nanofluid impinging on a permeable extending sheet placed in a porous regime The Darcy–Forchheimer scheme with heat source/sink and thermal radiation is taken into account The shooting method is instrumental for obtaining numerical solutions of the transformed-converted system of nonlinear equations The prescribed surface temperature (PST) and prescribed heat flux (PHF) boundary conditions are used The impact of governing parameters on velocity, temperature, skin friction coefficient, Nusselt number, entropy generation rate and Bejan number are incorporated The significant outcomes of the current investigation are that increment in the suction parameter decline the flow velocity and temperature (for both PST and PHF cases) while the injection uplift them An enhancement in magnetic strength, the skin friction and heat transfer rate show the opposite trend for both SWCNT and MWCNT Bejan number is increasing with the increase in nanoparticle volume fraction $$\phi$$ for both SWCNT and MWCNT
Citations
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TL;DR: In this paper, the stagnation point flow of hybrid nanofluid with inclined magnetic field over a moving cylinder is analyzed and the heat transfer rate on the surface of the nonlinear stretching cylinder is investigated.

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TL;DR: A review of the thermal properties of nanofluids can be found in this article , where the authors discuss the various parameters that have been found to impact the thermal behavior in general significantly and the thermal conductivity of these nanometrics, including particle size and shape, pH of the fluids, surfactant, solvent type, hydrogen bonding, temperature, base fluids, and particular interest here, the alignment of the nanoparticles utilized (carbon nanotubes, Graphene, and metal oxides nanoparticles).

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TL;DR: In this paper, an analysis for heat transfer enhancement of Graphene oxide (Go)/Kerosene oil and Go+ silver (Ag)/Kosene oil hybrid nanofluid is made theoretically when the fluids flow through a porous medium over a stretching sheet in the presence of an applied magnetic field.

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TL;DR: In this article , the authors investigated the steady stream and energy transfer of hybridizing nanoparticles across a surface with radiative impacts, and used the Galerkin finite element technique to solve the issue analytically.

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References
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Journal ArticleDOI
TL;DR: In this paper, a plastischem material fliesst aus einem Spalt with einer Geschwindigkeit, die proportional zum Abstand vom Spalt ist.
Abstract: Eine Platte aus plastischem Material fliesst aus einem Spalt mit einer Geschwindigkeit, die proportional zum Abstand vom Spalt ist. Eine exakte Losung der Grenzschichtgleichungen fur die von der Platte erzeugte Luftbewegung wird gegeben. Oberflachenreibung und Warmeleitungskoeffizient werden berechnet.

3,317 citations


"Entropy analysis of a hydromagnetic..." refers background in this paper

  • ...Crane [4] then studied two-dimensional flow through a circular stretching pane in order to develop this work....

    [...]

Journal ArticleDOI
TL;DR: In this paper, the authors derived equations of motion, constitutive equations and boundary conditions for a class of fluids named micropolar fluids, which respond to micro-rotational motions and spin inertia and therefore can support couple stress and distributed body couples.
Abstract: : Equations of motion, constitutive equations and boundary conditions are derived for a class of fluids named micropolar fluids. These fluids respond to micro-rotational motions and spin inertia and therefore can support couple stress and distributed body couples. Thermodynamical restrictions are studied in detail and field equations are obtained for the density, velocity vector and micro-rotation vector. The system is solved for a channel flow exhibiting certain interesting phenomena.

2,256 citations

Journal ArticleDOI
B. C. Sakiadis1
TL;DR: In this article, the boundary-layer behavior on continuous surfaces is examined, and the basic differential and integral momentum equations of boundary layer theory are derived for such surfaces, for both laminar and turbulent flow in the boundary layer.
Abstract: This study deals with boundary-layer flow on continuous solid surfaces. Flow of this type represents a new class of boundary-layer problems, with solutions substantially different from those for boundary-layer flow on surfaces of finite length. In this paper the boundary-layer behavior on continuous surfaces is examined, and the basic differential and integral momentum equations of boundary-layer theory are derived for such surfaces. In subsequent papers these equations will be solved for the boundary layer on a moving continuous flat surface and a moving continuous cylindrical surface, for both laminar and turbulent flow in the boundary layer.

2,061 citations


"Entropy analysis of a hydromagnetic..." refers background in this paper

  • ...First, Sakiadis [3] studied the boundary layer flowing over rolling rigid surfaces of incompressible viscous fluid....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a review dealing with a certain restricted portion of the mechanics of heterogeneous media is presented, where the problem of detailed transport processes between particles and gas may be treated independently of the complete dynamical problem, and this aspect, being a study of its own, will be suppressed to a considerable extent.
Abstract: This review deals with a certain restricted portion of the mechanics of heterogeneous media. The volume fraction of the solid-particle or droplet cloud is considered to be so small that the interaction between individual particles may be neglected or highly simplified. This limitation applies to the individual flow fields about the particles as well as to collisions, and to heat and mass transfer as well as to momentum exchange between phases. Under this circumstance, the problem of detailed transport processes between particles and gas may be treated independently of the complete dynamical problem, and this aspect, being a study of its own, will be suppressed to a considerable extent here. There are problems, such as the impact of particles on walls, the concentration separation in boundary layers or pipe flow, in which the distortion of the particle flow field due to a solid wall or another particle is the central physical issue. These problems therefore lie outside the scope of the review. On the other hand, the structure of shock waves, sound attenuation, and many flow-field problems can be treated within our present restrictions. The basic equations and exchange processes will be introduced first, together with the physical parameters that indicate the relative importance of the particle cloud and the limitations of the dusty-gas concept. Then several different problems will be discussed that lead to some of the significant results in the field and illustrate analytical techniques that have proven useful.

652 citations