Flow visualization using heat lines for unsteady radiative hydromagnetic micropolar convection from a vertical slender hollow cylinder

Reddy, G. Janardhana; Kethireddy, Bhaskerreddy; Bég, O. Anwar

doi:10.1016/j.ijmecsci.2018.03.014

Cited by 16 publications

(6 citation statements)

References 42 publications

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“…Reddy et al [36] explored the natural convection for the Casson fluid flow past over a hollow slender cylinder. With the help of Bejan's heat function concept, Reddy et al [37] investigated the unsteady MHD micropolar fluid flow in a homogeneously thermal radiative hollow slender cylinder with the radiative transmission of heat effect. Further latest stimulating work in this area can be found in [38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Thermophoresis and Brownian Model of Pseudo-Plastic Nanofluid Flow over a Vertical Slender Cylinder

Hussain

Nadeem

2020

Mathematical Problems in Engineering

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This study focuses on the industrial and engineering interest quantities, such as drag force and rate of transmission of heat, for pseudo-plastic nanofluid flow. The attributes of natural convection of the pseudo-plastic nanofluid flow model over a vertical slender cylinder are explored. The pseudo-plastic flow is studied under the influence of concentration of nanoparticles, rate of heat transmission, and drag force. For the first time, the pseudo-plastic nanofluid flow model has been implemented over a vertical slender cylinder which is not yet investigated. The acquired model is based on thermophoresis and Brownian motion mechanisms. The governing equations of pseudo-plastic nanofluid in cylindrical coordinates are modelled. The developed system of nonlinear equations is tackled by boundary layer assumptions and similarity transformations. Moreover, the solution of the acquired system exhibited by using a new powerful numerical technique. A comprehensive debate on drag force and transmission of heat under the influence of various emerging parameters is illustrated in the table. Furthermore, the effects of dimensionless parameters over the velocity profile, temperature profile, and concentration of nanoparticle profile have been exhibited graphically.

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Section: Introductionmentioning

confidence: 99%

Thermophoresis and Brownian Model of Pseudo-Plastic Nanofluid Flow over a Vertical Slender Cylinder

Hussain

Nadeem

2020

Mathematical Problems in Engineering

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“…By considering vertical cylinder geometry, Rani et al [21] analyzed Bejan's heat and mass lines of Couple stress fluid flow. In addition, Reddy et al [22][23][24] numerically studied heat flow visualization of non-Newtonian fluids such as Casson, micropolar and third-grade fluids around vertical and slender cylinders using the CNS technique. Further, Vinay et al [25] utilized the Galerkin finite element approach to comprehensively evaluate and visualize convection thermal and concentration transmission in permeable enclosures under multiple interrelating force fields.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Reddy et al. [22–24] numerically studied heat flow visualization of non‐Newtonian fluids such as Casson, micropolar and third‐grade fluids around vertical and slender cylinders using the CNS technique. Further, Vinay et al.…”

Section: Introductionmentioning

confidence: 99%

Turbulent heat and mass lines in finite difference regime

S P,

Reddy,

Basha

2023

Z Angew Math Mech

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Finite difference modelling of turbulent heat and mass flow visualization finds numerous applications in atmospheric flows/oceanic currents, wind turbines, thermal transfer in nuclear reactors, drag in oil pipelines, cooling of industrial machineries, and to investigate the complexity, dynamic and chaotic nature of the physical system. A turbulent phenomenon is effectively implemented in engineering, physics, earth sciences, bio‐engineering and medicine. Hence, motivated by the advantages of turbulence in various engineering fields, in the current article, a finite difference analysis is performed to demonstrate the k‐ε turbulence model‐based heat and mass lines visualization in boundary layer regime under turbulent buoyancy‐driven convective conditions along a cylinder. Turbulent flow characteristics are accurately explored by deploying the classical Newtonian flow model. Further, to accomplish a more sophisticated finite difference simulation, the effects of extra kinetic energy and its dissipation rate equations are considered. The produced Navier‐Stokes equations for time‐dependent turbulent heat and mass transmission are rendered to non‐dimensional by deploying suitable dimensionless numbers. The advanced coupled nonlinear turbulent unsteady buoyancy‐motivated vertical convection problem is then solved with a well‐sophisticated finite difference scheme such as Crank‐Nicolson technique using computational software. Authentication of current results with former solutions over a range of buoyancy number, Schmidt, and Prandtl parameters are presented. An extensive tabular and graphical discussion along with contours, heat and masslines visualization is included to enumerate the hydro‐dynamic, thermal and mass diffusion behaviour for the impact of emerged regulating numbers in the Prandtl regime. It is confirmed that, the accelerating turbulent buoyancy‐ratio number, maximizes the velocity, kinetic energy and dissipation rate at . Further, the numerical values of laminar thermal and mass diffusion rates are monotonically enhanced when compared to the turbulent values. Also, to verify the current findings, the authors compared the LRN k‐ε model turbulent results with the existing solutions and found good agreement. Further, the uniqueness and novelty of the current investigation is the exploration of heat and masslines in unsteady buoyancy‐driven convection regime under the influence of k‐ε turbulence model which extends the former studies and offers a more precise appraisal of the thermal and mass diffusion lines via the Crank‐Nicolson analysis.

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“…Aslani et al [19] analyzed radiation effects of a micropolar fluid with mass transpiration. Janardhana et al [20] worked on the micropolar fluids and solved it numerically under the effect of transfer of heat as well as the radiations. He used a cylinder for this, which was empty and in the upright direction.…”

Section: Introductionmentioning

confidence: 99%

Radiation and Multiple Slip Effects on Magnetohydrodynamic Bioconvection Flow of Micropolar Based Nanofluid over a Stretching Surface

et al. 2021

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Our aim in this article is to study the radiation and multiple slip effects on magnetohydrodynamic bioconvection flow of micropolar based nanofluid over a stretching surface. In addition, a steering mechanism of making improvements to the Brownian motion and thermophoresis motion of nanoparticles is integrated. The numerical solution of 2-dimensional laminar bioconvective boundary layer flow of micropolar based nanofluids is presented. The basic formulation as partial differential equations is transmuted into ordinary differential equations with the help of suitable similarity transformations. Which are then solved by using the Runge–Kutta method of fourth-order with shooting technique. Some important and relevant characteristics of physical quantities are evaluated via inclusive numerical computations. The influence of vital parameters such as buoyancy parameter λ, bioconvection Rayleigh number Rb, the material parameter K are examined. This investigation showed that with the increment in material parameter, micro rotation and velocity profile increases. In addition, the temperature rises due to the enhancement in Nb (Brownian motion) and Nt (thermophoresis parameter).

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Flow visualization using heat lines for unsteady radiative hydromagnetic micropolar convection from a vertical slender hollow cylinder

Abstract: Ti t l e Flo w vis u aliz a tio n u si n g h e a t lin e s for u n s t e a dy r a di a tiv e h y d r o m a g n e ti c Mic r o p ol a r c o nv e c tio n fro m a v e r ti c al sl e n d e r h ollo w cylin d e r A u t h o r s Ja n a r d h a n a R e d dy, G, Ket hi r e d dy, B a n d Be g, OA

Cited by 16 publications

References 42 publications

Thermophoresis and Brownian Model of Pseudo-Plastic Nanofluid Flow over a Vertical Slender Cylinder

Thermophoresis and Brownian Model of Pseudo-Plastic Nanofluid Flow over a Vertical Slender Cylinder

Turbulent heat and mass lines in finite difference regime

Radiation and Multiple Slip Effects on Magnetohydrodynamic Bioconvection Flow of Micropolar Based Nanofluid over a Stretching Surface

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