Transient free convection flow past vertical cylinder with constant heat flux and mass transfer

Deka, Rudra Kanta; Paul, Ashish; Chaliha, Arun

doi:10.1016/j.asej.2015.10.006

Cited by 17 publications

(13 citation statements)

References 34 publications

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“…Jha et al 13 acquired the transient influence on the reactive viscous liquid in a vertical tube by using numerical schemes as well as the steady-state solution with the perturbation technique. Further studies involving transient free convective flows under different physical configurations have been reported by several researchers, see, for example, Jha and Apere, 14 Deka and Paul, 15 and Deka et al 16 The hydromagnetic transient flow in a vertical concentric annulus due to the natural convection with adiabatic and isothermal boundaries has been analyzed by Jha and Yusuf. 17 Also, Maurya et al 18 studied the influence of radial magnetic field on unsteady hydromagnetic flow problems in a circular cylinder.…”

Section: Introductionmentioning

confidence: 97%

Transient free convective hydromagnetic flow in an infinite vertical cylinder with Hall current and heat source/sink

Dwivedi

Singh

2020

Heat Trans

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The analysis of hydromagnetic flow has been a concern of consideration for research scientists and engineers. In this treatise, the unsteady hydromagnetic free convective flow of an incompressible, viscous, and electrically conducting fluid and heat transfer in a vertical cylinder with Hall effects and transverse magnetic field, in the presence of heat source and sink, is studied. Exact solutions of dimensionless unsteady governing equations are obtained by using the Laplace transform technique. Transient fluid velocity and temperature field are depicted by graphs, whereas heat transfer rate, mass flux, and skinfriction are computed in a tabular form for different physical parametric values, such as the source/sink parameter, Hall current parameter, Prandtl number, and Hartmann number. The valuable result from the investigation is that the Hall parameter slightly accelerates the fluid velocity and it provides resistance to the skin friction at the cylindrical surface. Moreover, it is noticeable that temperature as well as velocity enhances and finally gets to its steady state with time. To be noted, the Hall effects have been widely applied in numerous experimental engineering applications, such as constrictions of turbines, Hall accelerators, Hall sensors.

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Section: Introductionmentioning

confidence: 97%

Transient free convective hydromagnetic flow in an infinite vertical cylinder with Hall current and heat source/sink

Dwivedi

Singh

2020

Heat Trans

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“…Jue et al [8] examined drag coefficient and Nusselt number of mixed convection across three heated cylinders in a channel, and found that the overall averaged Nusselt number reached the maximum value at spacing over diameter ratio equal to 0.75 among the spacing over diameter ratios (0.5 to 1.25). Deka et al [9] investigated transient natural convection across an infinite perpendicular cylinder with constant heat flux at the cylinder surface. Their results indicated that the temperature as well as velocity increased limitlessly with increasing time when the concentration approached the steady situation at greater periods.…”

Section: Introductionmentioning

confidence: 99%

Study of Natural Convection of Lithium-Ion Battery Module Employing Phase Change Material

Ciou

et al. 2021

Processes

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When the Lithium-ion battery operates at high temperature, it would bring about short circuit; if it reaches a critical temperature, it will explode. It is important to reduce its maximum temperature by appropriate heat transfer technique. When it operates without an external force for cooling, it needs natural convection technique to take away heat dissipation. Therefore, this study numerically examines three-dimensional transient natural convection of cylindrical lithium-ion batteries inside a rectangular pack with air between cylinders. The heat transfer technique in this study applies PCM (phase change material) between cylinders without or with fin array on top changing distance between cells. The results indicated that for no fin array, the package adopting the PCM could achieve the peak temperature 14.2 °C smaller than the package adopting the air. However, the package adopting the PCM with fin array vertical to the top of the package can best enhance average Nusselt number by 120% compared with using air and no fin array. Replacing the air by the PCM can keep the peak temperature of the batteries within the desirable operation range.

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“…Mass diffusion effects on the transient flow in a vertical cylinder with variable surface temperature have been investigated by Rani 29 . Recently, Deka et al 30 have derived the exact analytic solution of an unsteady natural convective flow with constant heat and mass transfer in a vertical cylinder. Maurya et al 31 have derived the exact solution of the problem describing the transient magnetohydrodynamic flow in a horizontal circular cylinder by applying the separation of variables technique.…”

Section: Introductionmentioning

confidence: 99%

Transient free convection of a second‐grade fluid flowing in a vertical cylinder

Dwivedi

Singh

2020

Heat Trans

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The intention of the present article is to examine the transient effect on the free convection of the second‐grade fluid flowing in a vertical cylinder. We have found the analytical solution of the derived governing partial differential equations in nondimensional form corresponding to the velocity as well as the temperature fields by applying the Laplace transformation method in terms of the Bessel function of the first kind. To obtain the impacts of the appropriate parameters related to the given equations, such as the second‐grade fluid parameter and the Prandtl number, the numerical values of the velocity are discussed and displayed in graphs. Furthermore, the mass flow rate and the skin friction at the inner surface of the cylinder are given in a tabular form. The influence of the second‐grade fluid parameter is to decelerate the velocity as well as the mass flow rate and to enhance the steady‐state time.

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Transient free convection flow past vertical cylinder with constant heat flux and mass transfer

Cited by 17 publications

References 34 publications

Transient free convective hydromagnetic flow in an infinite vertical cylinder with Hall current and heat source/sink

Transient free convective hydromagnetic flow in an infinite vertical cylinder with Hall current and heat source/sink

Study of Natural Convection of Lithium-Ion Battery Module Employing Phase Change Material

Transient free convection of a second‐grade fluid flowing in a vertical cylinder

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