Double Diffusive Natural Convection in a Partially Layered Cavity with inner Solid Conductive Body

Ismael, Muneer A.; Ghalib, Hassan S.

doi:10.24200/sci.2017.4349

Cited by 9 publications

(8 citation statements)

References 15 publications

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“…The evolutions of local distributions of model 2 displayed in Figure 20 for the case f = show that the temperature gradient is ameliorated when increasing Ra from 10 4 to 10 5 . The circular roll that appears above the circular groove is no longer present in model 2.…”

Section: Effect Of the Radius Ratiomentioning

confidence: 99%

“…Local distributions F = 290°. The local distributions of dimensionless temperature, dimensionless velocity and Nusselt number are depicted in Figures 5 and 6 for the cases (1, 1) and (2, 1) respectively for Ra = 10 4 and 10 5 The local distributions present symmetric profiles for Ra = 10 4 , and 10 5 . The first thing to remark is that; for Ra = 10 4 ; the thermal plume above the cylinder has not changed when deforming the geometry from model 0 to model 1 and model 2.…”

Section: Effect Of Groove Location and Rayleigh Numbermentioning

confidence: 99%

“…Different aspects were then conducted numerically as well as experimentally by changing the shape of the enclosure since it plays a very important role in the reduction or the increase of heat loss. Research works treated the cases of triangular, [1][2][3][4] square, [5][6][7] and arbitrary 8,9 enclosures with various geometries of inner heated objects. In the other hand, the form of the inner heated surface has also an important effect on the heat transfer rate in the enclosure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of grooved cylinder on heat transfer by natural convection in cylindrical geometry

Abdelmlek¹,

Nejma²

2022

Advances in Mechanical Engineering

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The current study reports a numerical analysis of a two-dimensional steady-state natural convection heat transfer from grooved heated cylinder for laminar flow regime. Two groove shapes are investigated in this work: circular and triangular groove. Simulations were carried out by varying the groove location, radius ratio f from 0.1 to 1, and the Rayleigh number over the range [103–106]. The thermal and dynamic behaviors are carefully analyzed and compared to the case of non-grooved cylinder (model 0). It is found that the heat transfer rate rises up with the increase of Rayleigh number. In addition, the groove locations φ = −90, and 80° provide the lowest heat transfer rate. A decrease of 9.4% in the heat transfer rate is detected for the case of triangular groove with f = 0.7 and Ra = 105. On the other hand, the highest heat transfer rate is provided at a position φ = −45° and 45° for f > 0.65. For these last groove locations, lower f present optimal configurations to accumulate heat on the cylinder. In fact, circular grooved cylinder with f = 0.1 decreases the heat loss by 9.3% and 12.4% for the locations φ = −45° and 45°, respectively compared to model 0. These results would be useful for engineering applications that are interested in the accumulation or transfer of heat through cylindrical ducts.

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Section: Effect Of the Radius Ratiomentioning

confidence: 99%

Section: Effect Of Groove Location and Rayleigh Numbermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of grooved cylinder on heat transfer by natural convection in cylindrical geometry

Abdelmlek¹,

Nejma²

2022

Advances in Mechanical Engineering

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“…Sheikholeslami et al [26] described the effects of thermal radiation on the transport of nanofluid in the presence of magnetic field. Ismael and Ghalib [27] considered the characteristic of natural convection of double diffusive flow in a cavity. Ghaffarpasand [28] discussed the Soret and Dufour effects on the flow of double convection in a lid-driven cavity.…”

Section: ) Introductionmentioning

confidence: 99%

Particle rotation effects in Cosserat-Maxwell boundary layer flow with non-Fourier heat transfer using a new novel approach

et al. 2020

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In this article we use a non-classical approach to investigate different physical effects of Cosserat-Maxwell fluid flow with non-Fourier heat transfer mechanism. Furthermore, a new numerical approach is used and outlined for computing and analyzing the behavior of such flows. In particular, continuous Galerkin-Petrov discretization scheme is embedded with shooting method to get the numerical algorithm to solve the stagnation point flow of Cosserat-Maxwell fluid with Cattaneo-Christov heat transfer. The mathematical description of the physical problem is stated in the form of partial differential equations (PDEs) which govern the flow mechanism. Further, the suitable transformations are utilized to describe the governing PDEs into their respective ordinary differential equations. Numerical experiments are performed for a specific case where there are weak concentrations of the flow near the stretching surface thereby allowing the microelement to rotate and generate vortex flow near the stretching surface. Buoyancy effects

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“…Buoyancy ratio influences on double diffusion in cavities have been examined by Mahapatra et al (2013) and Moukalled and Darwish(2015). Ismael and Ghalib (2018) introduced a conductive solid body in a cavity during double-diffusive convection in a cavity with a partial layer porous medium.…”

Section: Introductionmentioning

confidence: 99%

Effects of buoyancy ratio on diffusion of solid particles inside a pipe during double diffusive flow of a nanofluid

Aly

Mohamed

2020

HFF

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Purpose The purpose of this study is to use an incompressible smoothed particle hydrodynamics (ISPH) method for simulating buoyancy ratio and magnetic field effects on double diffusive natural convection of a cooper-water nanofluid in a cavity. An open pipe is embedded inside the center of a cavity, and it is occupied by solid particles. Design/methodology/approach The dimensionless governing equations in Lagrangian form were solved by ISPH method. Two different thermal conditions were considered for the solid particles. The actions of the solid particles were tracked inside a cavity. The effects of Hartman parameter, Rayleigh number, nanoparticles volume fraction and Lewis number on features of heat and mass transfer and flow field were tested. Findings The results showed that the buoyancy ratio changes the directions of the solid particles diffusion in a cavity. The hot solid particles were raised upwards at aiding mode (N > 0) and downwards at an opposing mode (N < 0). A comparison is made with experimental and numerical simulation results, and it showed a well agreement. Originality/value Novel studies for the impacts of buoyancy ratio on the diffusion of solid particles embedded in an open pipe during double-diffusive flow were conducted.

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Double Diffusive Natural Convection in a Partially Layered Cavity with inner Solid Conductive Body

Cited by 9 publications

References 15 publications

Impact of grooved cylinder on heat transfer by natural convection in cylindrical geometry

Impact of grooved cylinder on heat transfer by natural convection in cylindrical geometry

Particle rotation effects in Cosserat-Maxwell boundary layer flow with non-Fourier heat transfer using a new novel approach

Effects of buoyancy ratio on diffusion of solid particles inside a pipe during double diffusive flow of a nanofluid

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