Onset of double-diffusive convection of a sparsely packed micropolar fluid in a porous medium layer saturated with a nanofluid

Umavathi, J. C.; Sheremet, Mikhail A.

doi:10.1007/s10404-017-1965-9

Cited by 32 publications

(15 citation statements)

References 40 publications

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“…Umavathi and Sasso 27,28 also worked including the effects of variable properties. The convective stability for the nanofluid saturated with porous medium was discussed by Umavathi et al 29 Umavathi et al 30 worked on the double-diffusive stability analysis for micropolar nanofluid saturated with porous medium. Numerical study of boundary layer flow over a penetrating surface was discussed by Subhashini et al 31 for double diffusive convection.…”

Section: Introductionmentioning

confidence: 99%

Triple diffusive mixed convection flow in a duct using convective boundary conditions

Umavathi

Ali

Patil

2020

Math Methods in App Sciences

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The motivation of the current article is to explore a numerical investigation on steady triply diffusive convection in a vertical channel. Heat is exchanged from the external fluid with the plates. The reference temperature is taken as equal and also as different for the external fluid. Solutions in the absence of viscous dissipation and buoyancy forces are also obtained as special cases. General solutions including the effects of viscous dissipation and buoyancy forces are obtained analytically using the method of perturbation. The analytical solutions can be used only if the Brinkman number is small. Hence to know the flow properties for all values of Brinkman number, we resort to numerical solutions. The effects of thermal Grashof number, solutal Grashof number, and the chemical reaction parameter on the flow field are evaluated numerically. The obtained results are validated against previously published results for special case of the problems.

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Section: Introductionmentioning

confidence: 99%

Triple diffusive mixed convection flow in a duct using convective boundary conditions

Umavathi

Ali

Patil

2020

Math Methods in App Sciences

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“…They concluded that the rate of heat transfer as well as skin friction decreases with the increase in Strouhal number. Other related article can be found in the work of Umavathi and Sheremet (2017).…”

Section: Natural Convection Flowmentioning

confidence: 99%

Natural convection flow in a vertical micro-annulus with time-periodic thermal boundary conditions

Jha

Oni

2018

MMMS

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Purpose The purpose of this paper is to investigate the impact of time-periodic thermal boundary conditions on natural convection flow in a vertical micro-annulus. Design/methodology/approach Analytical solution in terms of Bessel’s function and modified Bessel’s function of order 0 and 1 is obtained for velocity, temperature, Nusselt number, skin friction and mass flow rate. Findings It is established that the role of Knudsen number and fluid–wall interaction parameter is to decrease fluid temperature, velocity, Nusselt number and skin friction. Research limitations/implications No laboratory practical or experiment was conducted. Practical implications Cooling device in electronic panels, card and micro-chips is frequently cooled by natural convection. Originality/value In view of the amount of works done on natural convection in microchannel, it becomes interesting to investigate the effect that time-periodic heating has on natural convection flow in a vertical micro-annulus. The purpose of this paper is to examine the impact of time-periodic thermal boundary conditions on natural convection flow in a vertical micro-annulus.

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“…Furthermore, Srivastava 18 explored the study done by Srivastava and Bera 17 by applying vertical electrical field on the double‐diffusive system. The linear and nonlinear stability analysis was performed by Umavathi et al 19,20 to analyse the stability of double‐diffusive convection in a micropolar fluid as well as in a nanofluid saturated porous medium. They solved the eigenvalue problems by the Galerkin technique.…”

Section: Introductionmentioning

confidence: 99%

Stability of a chemically reacting double‐diffusive fluid layer in a porous medium

Mahajan

Tripathi

2021

Heat Trans

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In the present study, double‐diffusive convection with chemical reaction in a Darcy–Brinkman porous layer, heated and salted below, has been investigated. Linear analysis is performed with the help of the normal mode technique, and nonlinear analysis is performed with the help of the energy method. The effect of the thermal contribution of the chemical reaction is found to be more effective on the convective instability in comparison with the solutal contribution of the chemical reaction. The reaction parameters k 1 , k 2 enhance the onset of convection in the stationary mode, however, in oscillatory mode, the onset of convection is seen to be delayed. The effect of solute Rayleigh number R s , Darcy number D a , is depicted graphically.

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Onset of double-diffusive convection of a sparsely packed micropolar fluid in a porous medium layer saturated with a nanofluid

Cited by 32 publications

References 40 publications

Triple diffusive mixed convection flow in a duct using convective boundary conditions

Triple diffusive mixed convection flow in a duct using convective boundary conditions

Natural convection flow in a vertical micro-annulus with time-periodic thermal boundary conditions

Stability of a chemically reacting double‐diffusive fluid layer in a porous medium

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