Numerical simulation of double diffusive laminar mixed convection in a horizontal annulus with hot, solutal and rotating inner cylinder

Teamah, Mohamed A.

doi:10.1016/j.ijthermalsci.2006.09.002

Cited by 24 publications

(13 citation statements)

References 18 publications

(20 reference statements)

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“…This figure shows us an excellent agreement for the values of average Nusselt number. On the other hand, the values of average Sherwood number obtained was in good agreement with those found by Teamah [Teamah (2007)], for the high values of Lewis, a maximum difference was less than five percent.…”

Section: Validationsupporting

confidence: 90%

“…Fig. 3 illustrates a comparison with the results obtained by Al-Amiri et al [Al-Amiri and Khanafer (2006)] and Teamah [Teamah (2007)], this on the effect of Lewis number on the average Nusselt and Sherwood numbers Fig. 3(a).…”

Section: Validationmentioning

confidence: 75%

“…After, studies were made by Lee et al [Lee, Kang and Son (1999); Lee, Kang and Son (2000)] for the phenomenon study of double-diffusion convection of a stable stratified fluid in a rotating annular space, they showed the effect of rotation on the development and fusion of the multi-layer flow structure and various variables. Then Lykov et al [Bubnovich and Kolesnikov (1986)] and Kolesnikov et al [kolesnikov and bubnovich (1988)] made a numerical study of the double-diffusion natural convection in a horizontal annulus and it was solved or they showed the effect of walls on the heat transfer, after Sung et al [Sung, Cho and Hyun (1993)] made a numerical study of a double-diffusion mixed convection in a rotating annulus in order to see the effect of rotation on the overall structure of the flow, when the buoyancy ratio is moderate the global flux character shows a considerable dependence of the relative strength of the rotation effect, then in 2005 Almiri et al [Al-Amiri and Khanafer (2006)] have carried out a numerical study of doublediffusion mixed convection in a horizontal annulus where the outer cylinder rotates and which induces forced convection, the rate of heat and mass transfer have been examined for different dimensionless numbers or predictions of the Nusselt and Sherwood number were obtained for the Lewis number ranges and the buoyancy ratio, in the same year the same authors [Al-Amiri and Khanafer (2005)] conducted a numerical study on doublediffusion convection heat transfer in a cylindrical horizontal annulus with a cylinder heated interior with sinusoidal temperature, after study they concluded that the amplitude and frequency of the heated inner cylinder were found to cause a significant increase in the rate of heat transfer, then another numerical study of the dual-diffusion laminar convection was made by Teamah [Teamah (2007)]. In a horizontal cylindrical annulus with a rotating inner cylinder where the inner and outer cylinders are maintained at uniform temperatures and concentrations, the stream function, isothermal lines, iso-concentrations and numbers of Nusselt and Sherwood were studied.…”

mentioning

confidence: 99%

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Numerical Simulation of Double Diffusive Mixed Convection in a Horizontal Annulus with Finned Inner Cylinder

Cherfi¹,

Sadaoui²,

Sahi³

et al. 2019

Fluid Dynamics &Amp; Materials Processing

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The present work relates to a numerical investigation of double diffusive mixed convection around a horizontal annulus with a finned inner cylinder. The solutal and thermal buoyancy forces are sustained by maintaining the inner and outer cylinders at uniform temperatures and concentrations. Buoyancy effects are also considered, with the Boussinesq approximation. The forced convection effect is induced by the outer cylinder rotating with an angular velocity (ω) in an anticlockwise direction. The studies are made for various combinations of dimensionless numbers; buoyancy ratio number (N), Lewis number (Le), Richardson number (Ri) and Grashof number (Gr). The isotherms, isoconcentrations and streamlines as well as both average and local Nusselt and Sherwood numbers were studied. A finite volume scheme is adopted to solve the transport equations for continuity, momentum, energy and mass transfer. The results indicate that the use of fins on the inner cylinder with outer cylinder rotation, significantly improves the heat and mass transfer in the annulus.

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Section: Validationsupporting

confidence: 90%

Section: Validationmentioning

confidence: 75%

mentioning

confidence: 99%

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Numerical Simulation of Double Diffusive Mixed Convection in a Horizontal Annulus with Finned Inner Cylinder

Cherfi¹,

Sadaoui²,

Sahi³

et al. 2019

Fluid Dynamics &Amp; Materials Processing

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“…Some surveyed studies in the literature were concerned primarily with the double diffusive convection, Teamah (2007) carried out a numerical study of double-diffusive laminar mixed convection within a two-dimensional, horizontal annulus rotating cylinders. The results for both average Nusselt and Sherwood numbers were correlated in terms of Lewis number, thermal Rayleigh number and buoyancy ratio.…”

Section: Introductionmentioning

confidence: 99%

Effect of an axial magnetic field on the heat and mass transfer in rotating annulus

Aberkane¹,

malika²,

Moderes³

et al. 2014

Int. J. Phys. Sci.

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This study is interested in the effect of an axial magnetic field imposed on incompressible flow of electrically conductive fluid between two horizontal coaxial cylinders. The imposed magnetic field is assumed uniform and constant. The effect of heat generation due to viscous dissipation is also taken into account. The inner and outer cylinders are maintained at different uniform temperatures and concentrations. The movement of the fluid is due to rotation of the cylinder with a constant speed. An exact solution of the governing equations for momentum and energy are obtained in the form of Bessel functions. A finite difference implicit scheme was used in the numerical solution to solve the governing equations of convection flow and mass transfer. The velocity, concentration and temperature distributions were obtained with and without the magnetic field. The results show that for different values of the Hartmann number, the velocity and concentration between the two cylinders decreases as the Hartmann number increases. On the other hand, the Hartmann number does not affect the temperature. Also, it is found that by increasing the Hartmann number, the Nusselt and Sherwood numbers decreases.

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“…They also classified the data of more than 100 food materials in 11 categories. Double-diffusive laminar mixed convection was numerically considered by Teamah [28], who determined that mass diffusion becomes stronger with the increase of Lewis number. McMinn and Magee [29] investigated the moisture transport in potato cylinders by considering the effects of air velocity and temperature on the drying rate.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic-thermal boundary layer development and mass transfer characteristics of a circular cylinder in confined flow

Ozalp

Dinçer

2010

International Journal of Thermal Sciences

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Numerical simulation of double diffusive laminar mixed convection in a horizontal annulus with hot, solutal and rotating inner cylinder

Cited by 24 publications

References 18 publications

Numerical Simulation of Double Diffusive Mixed Convection in a Horizontal Annulus with Finned Inner Cylinder

Numerical Simulation of Double Diffusive Mixed Convection in a Horizontal Annulus with Finned Inner Cylinder

Effect of an axial magnetic field on the heat and mass transfer in rotating annulus

Hydrodynamic-thermal boundary layer development and mass transfer characteristics of a circular cylinder in confined flow

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