Electrohydro dynamics convection in dielectric rotating Oldroydian nanofluid in porous medium

Sharma, Pushap Lata; Kapalta, Mohini; Kumar, Ashok; Bains, Deepak; Gupta, Sumit; Thakur, Pankaj

doi:10.46481/jnsps.2023.1231

Cited by 11 publications

(8 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Maekawa et al 20 studied theoretically the onset of EC on buoyancy and Marangoni convection in a dielectric fluid layer under the influence of AC and DC electric fields. Besides, many studies of ETC have appeared incorporating various other effects, for example, rotation, [21][22][23][24][25][26][27][28] viscoelasticity of the dielectric fluid, [29][30][31] volumetric heat source, [32][33][34] surface tension and variable internal heating, 35 elastico-viscous nanofluid, [36][37][38][39] and so on.…”

Section: Introductionmentioning

confidence: 99%

Volumetric heating and AC electric field effects on porous convection with general boundary conditions

Rachitha,

Nanjundappa,

Shivakumara

2024

Heat Trans

View full text Add to dashboard Cite

The onset of convective instability in an internally heated dielectric fluid‐saturated porous layer under the influence of a uniform AC electric field for different types of boundary conditions is investigated. The flow in the porous medium is described by the Brinkman model with fluid viscosity different from effective viscosity. The lower adiabatic and the top with finite heat transfer coefficient to the external environment boundaries are considered to be either rigid or stress‐free. The presence of a uniform volumetric heat source alters the conduction profile of the temperature field from linear to quadratic in the vertical coordinate. A modal linear stability analysis of the basic motionless state is carried out and the general regime of linear instability is investigated by solving the stability eigenvalue problem numerically using the Galerkin method of weighted residual technique. The neutral stability condition as well as the critical value of the thermal Rayleigh number is computed for rigid–rigid, free–free, and rigid–free boundaries for various values of governing parameters. It is seen that the nature of boundaries affect the stability of the system only quantitatively, though not qualitatively. The rigid–rigid boundaries offer a more stabilizing effect against convection in comparison with rigid–free and free–free boundaries. The study found that the effect of increasing thermal electric Rayleigh number and the Darcy number is to hasten the onset of instability, while the opposite trend is perceived with an increase in the ratio of viscosities and Biot number. The outcomes of this investigation are found to be in good agreement with past studies under the limiting cases.

show abstract

Section: Introductionmentioning

confidence: 99%

Volumetric heating and AC electric field effects on porous convection with general boundary conditions

Rachitha,

Nanjundappa,

Shivakumara

2024

Heat Trans

View full text Add to dashboard Cite

show abstract

“…This approach is widely employed in physics, engineering and other scientific disciplines to study the stability and dynamics of systems ranging from mechanical vibrations to electromagnetic waves. Recently, the researchers like: Sharma et al [25,26], Bains et al [27], Sharma et al [28,29] and Bains et al [30] have analysed their investigations in different aspects by making use of normal mode analysis.…”

Section: Introductionmentioning

confidence: 99%

Throughflow effect on bi-disperse convection in Rivlin-Ericksen fluid

Sharma,

Thakur

2024

J. Nig. Soc. Phys. Sci.

View full text Add to dashboard Cite

In this investigation, we delve into the influence of throughflow on the phenomenon of bi-disperse convection within Rivlin-Ericksen fluid. In the context of examining bi-disperse convection within this specific type of fluid, the throughflow effect is considered to have a uniform vertical distribution. The primary focus of this study centers on evaluating the system’s linear stability. To achieve this, we employ normal mode analysis to compute the Darcy-Rayleigh number at the onset of convection. This Darcy-Rayleigh number is computed for both stationary and oscillatory convection modes. Furthermore, we conduct a comprehensive analysis and present the results in graphical form to illustrate the impact of various parameters, including Peclet number and kinematic viscoelastic parameter, on both stationary and oscillatory convection. Our research findings demonstrate that when Peclet number Pr1 < 0, it leads to destabilising effect on both stationary and oscillatory convections. Conversely, when Peclet number Pr1 > 0, it induces stabilising effect on both stationary as well as oscillatory convections.

show abstract

“…Meanwhile, researchers like Tzou [5,6], Nield and Bejan [7] and Sheu [8] have broken new ground by deciphering the mystery of nanofluid convection using a range of theoretical models. Through their recent research, Rana et al [9] and Sharma et al [10,11] have illuminated the intricate subject of thermal instabilities and explored the intriguing realm of non-Newtonian fluid.…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on the onset of thermal convection in a Jeffery nanofluid layer saturated by a porous medium: free-free, rigid-rigid and rigid-free boundary conditions

Ajit Kumar,

Pushap Lata,

Praveen Lata

et al. 2024

J. Nig. Soc. Phys. Sci.

View full text Add to dashboard Cite

The effect of the magnetic field on the onset of thermal convection in a porous layer saturated by Jeffrey nanofluid is studied. Three distinct boundary conditions are considered to be free-free, rigid-rigid and rigid-free boundaries. The model used for Jeffrey nanofluid includes the effect of Brownian motion and thermophoresis. The normal mode analysis as well as the Galerkin first approximation technique is used. The effects of the Rayleigh number of nanoparticles, Lewis number, modified diffusivity ratio, Jeffery parameter, porosity and Chandrasekhar number are investigated analytically and graphically. It is discovered that the Chandrasekhar number, Lewis number and modified diffusivity ratio have a stabilizing effect while the Jeffery parameter, nanoparticles Rayleigh number and porosity have a destabilizing effect. This study induces the effect of Chandrasekhar number and Jeffrey nanofluid. We have analyzed that Chandrasekhar number produces a stabilizing effect on the onset of convection i.e. it delays the onset of convection whereas the Jeffrey parameter which comes from Jeffrey nanofluid shows the destabilizing effect on the onset of convection i.e. it accelerates the onset of convection. The influence of a magnetic field on the commencement of nanofluid convection is significant in magnetohydrodynamic power generators, electrical equipment, petroleum reservoirs, nuclear reactors, biochemical engineering, chemical engineering and geophysics.

show abstract

Electrohydro dynamics convection in dielectric rotating Oldroydian nanofluid in porous medium

Cited by 11 publications

References 19 publications

Volumetric heating and AC electric field effects on porous convection with general boundary conditions

Volumetric heating and AC electric field effects on porous convection with general boundary conditions

Throughflow effect on bi-disperse convection in Rivlin-Ericksen fluid

Effect of magnetic field on the onset of thermal convection in a Jeffery nanofluid layer saturated by a porous medium: free-free, rigid-rigid and rigid-free boundary conditions

Contact Info

Product

Resources

About