Computational modeling of magnetohydrodynamic convection from a rotating cone in orthotropic Darcian porous media

Bég, O. Anwar; Prasad, V. Ramachandra; Vasu, B.; Gorla, R. S. R.

doi:10.1007/s40430-017-0708-x

Cited by 10 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ma et al [1] investigated theoretically and experimentally the species diffusion in a rotating cylinder. Further Mohanty et al [2] studied on cylinders, Anwar Bég et al [3] on thermo-magnetic free convection boundary layers from a spinning cone in permeable media, Subhashini et al [4] on compressible heat and mass transfer from a spinning sphere (using finite difference methods) and Takhar and Whitelaw [5] on asymptotic convection from a rotating sphere. An important geometry in various biochemical and medical processes is the rotating disk apparatus.…”

Section: Introductionmentioning

confidence: 99%

Adomian decomposition method simulation of von Kármán swrling bioconvection nanofluid flow

Shamshuddin

Mishra

Bég

et al. 2019

J. Cent. South Univ.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Adomian decomposition method simulation of von Kármán swrling bioconvection nanofluid flow

Shamshuddin

Mishra

Bég

et al. 2019

J. Cent. South Univ.

View full text Add to dashboard Cite

show abstract

“…Although the nanofluid cannot percolate as easily at higher values of P , this is compensated for via tighter packing of fibers (decreasing sparsity) which enables improved heat conduction through the porous medium, as noted by References [39,40,48,49]. Although in the present simulations, a Darcian model has been adopted, with isotropic considerations, future studies may explore orthotropic media as studied earlier by Anwar Bég et al, 41,50 that is, wherein permeability varies in both radial and tangential directions. Figure 13 shows that with increasing permeability parameter, there is initially a reduction in shear stress at the disk surface; however, with further distance from the disk surface, this trend is reversed and thereafter returns to the initial behavior in the free stream.…”

Section: Discussion Of Resultsmentioning

confidence: 85%

Computation of radiative Marangoni (thermocapillary) magnetohydrodynamic convection in a Cu‐water based nanofluid flow from a disk in porous media: Smart coating simulation

et al. 2020

View full text Add to dashboard Cite

With emerging applications for smart and intelligent coating systems in energy, there has been increasing activity in researching magnetic nanomaterial coating flows. Surface tension features significantly in such regimes, and in the presence of heat transfer, Marangoni (thermocapillary) convection arises. Motivated by elaborating deeper the intrinsic transport phenomena in such systems, in this paper, a mathematical model is developed for steady radiative heat transfer and Marangoni magnetohydrodynamic flow of a Cu‐water nanofluid influencing a strong magnetic field through a porous disk. The semianalytical adomain decomposition method is employed to find the solution of flow governing equations, which are reduced into ordinary differential equation form via the Von Karman similarity transformation. Validation with a generalized differential quadrature algorithm is included. The response in dimensionless velocity, temperature, wall heat transfer rate and shear stress is investigated for various values of the control parameters. Temperature is reduced with increasing Marangoni parameter, whereas the flow is accelerated. With increasing permeability parameter, the temperatures are elevated. Increasing radiative flux boosts temperatures further from the disk surface. Increasing magnetic parameter strongly dampens the boundary layer flow and elevates the temperatures, also eliminating temperature oscillations at lower magnetic field strengths.

show abstract

“…increasing magnetic field reduces local Nusselt number at both left and right walls. 43,44 However, while Nu is a maximum at the top of the left wall, it is a minimum at the top of the right wall. Maximum Nu is observed at the base of the right hot wall and minimum Nu computed at the base of the left cold wall.…”

Section: Ra Numentioning

confidence: 98%

“…Further details are given in. [42][43][44][45] Using the weak conservative form of the two-dimensional momentum and heat conservation equation a grid meshing procedure is deployed. Since a square enclosure is considered (L¼ H i.e.…”

Section: Computational Finite Difference Mac Solutionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of magnetohydrodynamic natural convection in a non-Darcian porous enclosure filled with electrically conducting helium gas

Bég¹,

Venkatadri²,

Prasad³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

A theoretical and computational study of MHD natural convection in an isotropic non-Darcian porous medium saturated with electrically conducting helium gas in an enclosure in the presence of heat generation is presented. A Brinkman extended Darcy-Forchheimer model is employed and the working fluid is assumed to be incompressible. The model is non-dimensionalised and converted into pressure-velocity form. The Harlow-Welch marker and cell (MAC) finite difference technique is employed to solve the nonlinear boundary value problem via pressure-vorticity coupling. A parametric investigation of the influence of Grashof number ( Gr), Hartmann magnetic number ( Ha), Darcy number ( Da), and the internal heat generation parameter ( Γ) on streamline and isotherm distributions with Prandtl number ( Pr) is 0.71 (Helium) is conducted. The variation in local Nusselt number along the left and right walls of the computational 2 D enclosure is also studied. Validation house-computational numerical MATLAB code is tests are included. Local Nusselt number is elevated at both left and right walls with greater Darcy number (higher medium permeability) and Grashof number. However, with greater internal heat generation, local Nusselt number magnitudes are enhanced at the left (cold) wall only but suppressed at the right (hot) wall. Increasing magnetic field reduces local Nusselt number at both left and right walls. With increasing magnetic field, the single vortex is strongly distorted and skewed towards the top left and lower right corners of the enclosure. Temperature contours at the left and right wall are however less intense with greater magnetic field effect. The simulations are of relevance to hybrid electromagnetic gaseous fuel cells, magnetic field control of filtration processes and porous media materials processing systems.

show abstract

Computational modeling of magnetohydrodynamic convection from a rotating cone in orthotropic Darcian porous media

Abstract: Ti t l e Co m p u t a tio n al m o d elli n g of m a g n e t o hy d r o dy n a mi c c o nv e c tio n fro m a r o t a ti n g c o n e in o r t h o t r o pic d a r ci a n p o r o u s m e di a

Cited by 10 publications

References 41 publications

Adomian decomposition method simulation of von Kármán swrling bioconvection nanofluid flow

Adomian decomposition method simulation of von Kármán swrling bioconvection nanofluid flow

Computation of radiative Marangoni (thermocapillary) magnetohydrodynamic convection in a Cu‐water based nanofluid flow from a disk in porous media: Smart coating simulation

Numerical study of magnetohydrodynamic natural convection in a non-Darcian porous enclosure filled with electrically conducting helium gas

Contact Info

Product

Resources

About