Heat and mass transfer phenomena due to a rotating non-isothermal wavy disk

Here magnetohydrodynamics Darcy–Forchheimer second order velocity slip flow of nanomaterials is discussed between two stretchable surfaces of rotating disks, where the both disks are rotating with altered angular frequencies and rates. Flow in permeable medium is designated by implementing Darcy–Forchheimer relation. The energy expression is discussed and modeled subject to various effects like dissipation, Ohmic heating (Joule heating), and heat source/sink. Two different types of nanoparticles, i.e. graphene oxide (GO) and titanium dioxide (TiO2), are utilized and H2O as a base fluid. Total entropy rate which depends on five different types of irreversibilities (i.e., heat, mass fluid friction, Ohmic heating and Darcy–Forchheimer or porosity) is calculated via thermodynamics law (second). Furthermore, binary chemical reaction is accounted for the analysis of mass with activation energy. Numerical solutions are found out with the help of shooting method. Behaviors of flow variables on the skin friction coefficients, velocity field, Nusselt numbers, temperature distribution, entropy generation, concentration, and Bejan number are plotted graphically and discussed. The results are compared with previous literature and found good agreement with them. Our obtained results illustrate that the entropy rate is more subject to rising Brinkman number.

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“…Thus, researchers have focused recently on the modeling of rotating flow subject to various flow assumptions. 16–25…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Entropy optimized magnetohydrodynamics Darcy–Forchheimer second order velocity slip flow of nanomaterials between two stretchable disks

Khan

Alzahrani

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…In this work, the three-dimensional, unsteady Ag-MgO /water hybrid nanofluid flow, caused by upward/downward movement of a wavy rotating disk, under the magnetic field influence with mass and heat transport has been studied. The following observations have been made on the basis of above computation: The wavy rotating surface increases the heat transmission rate up to 15%, comparatively to flat surface 32 . The rising credit of rotation parameter increases the kinematic energy of fluid, which result in the enhancement of velocity and temperature of hybrid nanoliquid.…”

Section: Discussionmentioning

confidence: 93%

“…The wavy rotating surface increases the heat transmission rate up to 15%, comparatively to flat surface 32 .…”

Section: Discussionmentioning

confidence: 95%

Numerical analysis of thermal conductive hybrid nanofluid flow over the surface of a wavy spinning disk

Ahmadian

Bilal

Khan

et al. 2020

Sci Rep

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A three dimensional (3D) numerical solution of unsteady, Ag-MgO hybrid nanoliquid flow with heat and mass transmission caused by upward/downward moving of wavy spinning disk has been scrutinized. The magnetic field has been also considered. The hybrid nanoliquid has been synthesized in the presence of Ag-MgO nanoparticles. The purpose of the study is to improve the rate of thermal energy transmission for several industrial purposes. The wavy rotating surface increases the heat transmission rate up to 15%, comparatively to the flat surface. The subsequent arrangement of modeled equations is diminished into dimensionless differential equation. The obtained system of equations is further analytically expounded via Homotopy analysis method HAM and the numerical Parametric continuation method (PCM) method has been used for the comparison of the outcomes. The results are graphically presented and discussed. It has been presumed that the geometry of spinning disk positively affects the velocity and thermal energy transmission. The addition of hybrid nanoparticles (silver and magnesium-oxide) significantly improved thermal property of carrier fluid. It uses is more efficacious to overcome low energy transmission. Such as, it provides improvement in thermal performance of carrier fluid, which play important role in power generation, hyperthermia, micro fabrication, air conditioning and metallurgical field.

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“…By using together with the von-Kármán transformations, equation (16) becomes, (18) in which denotes the Prandtl number and is the Eckert number. Eq.…”

Section: Heat Transfer Analysismentioning

confidence: 99%

“…Heat transfer to laminar flow by heated rotating disk with radially varying surface temperature was addressed by Millsaps and Pohlhausen [6]. After these initial contributions, a vast wealth of literature was subsequently published addressing rotating disk induced flows under different physical situations such as wall permeability, transverse magnetic field, non-Newtonian effects and different wall conditions (see [7]- [16] and refs. there in.…”

Section: Introductionmentioning

confidence: 99%

Second law analysis of heat transfer in swirling flow of Bingham fluid by a rotating disk subjected to suction effect

2021

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This framework presents heat transfer analysis for swirling flow of viscoplastic fluid bounded by a permeable rotating disk. Problem formulation is made through constitutive relations of Bingham fluid model. Viscous dissipation effects are preserved in the mathematical model. Entropy production analysis is made which is yet to be explored for the von-Kármán flow of non-Newtonian fluids. Having found the similarity equations, these have been dealt numerically for broad parameter values. The solutions are remarkably influenced by wall suction parameter and Bingham number which measures the fluid yield stress. Akin to earlier numerical results, thermal boundary layer suppresses upon increasing wall suction velocity. Thermal penetration depth is much enhanced when fluid yield stress becomes large. Higher heat transfer rate can be accomplished by employing higher suction velocity at the disk. However, deterioration in heat transfer is anticipated as fluid yield stress enlarges. Current numerical results are in perfect line with those of an existing article in limiting sense.

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Heat and mass transfer phenomena due to a rotating non-isothermal wavy disk

Cited by 20 publications

References 16 publications

RETRACTED: Entropy optimized magnetohydrodynamics Darcy–Forchheimer second order velocity slip flow of nanomaterials between two stretchable disks

RETRACTED: Entropy optimized magnetohydrodynamics Darcy–Forchheimer second order velocity slip flow of nanomaterials between two stretchable disks

Numerical analysis of thermal conductive hybrid nanofluid flow over the surface of a wavy spinning disk

Second law analysis of heat transfer in swirling flow of Bingham fluid by a rotating disk subjected to suction effect

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