Magnetohydrodynamic and thermal radiation effects on the boundary-layer flow due to a moving extensible surface with the velocity slip model: A comparative study of four nanofluids

Aly, Emad H.; Sayed, Hamed M.

doi:10.1016/j.jmmm.2016.08.072

Cited by 32 publications

(12 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CSCM has been widely applied in many scientific areas. Examples include computational fluid dynamics (Kaladhar et al [56], electrodynamics (Belgacem and Grundmann [57]), free vibration analysis of rotating and nonrotating Timoshenko beams (Ma'en and Butcher [58], magnetohydrodynamics (Aly and Sayed [59]), fractional diffusion equations (Agarwal and El-Sayed [60]), magneto-bioconvection wedge flow (Uddin et al [61]), non-Newtonian flow (Tian et al [62]), 3-D transient radiative-conductive heat transfer (Sun et al [63]), thermally stratified fluid in porous medium (Vasu et al [64]), 3-D Helmholtz-type equations (Bai et al [65]), electrohydrodynamic ion drag pump flows (Bég et al [66]) and ferromagnetic nano-coating dynamics (Shamshuddin et al [67]). In spite of the high precision and efficacy of the method, it has not been used extensively in nonlinear bioconvection nanofluid dynamics.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of Von Karman swirling bioconvective nanofluid transport from a rotating disk in a porous medium with Stefan blowing and anisotropic slip effects

Bég¹,

Kabir

Uddin

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

In recent years, significant progress has been made in modern micro- and nanotechnologies for micro/nano-electronic devices. These technologies are increasingly utilizing sophisticated fluid media to enhance performance. Among the new trends is the simultaneous adoption of nanofluids and biological micro-organisms. Motivated by bio-nanofluid rotating disk oxygenators in medical engineering, in the current work, a mathematical model is developed for steady convective von-Karman swirling flow from an impermeable radially stretched disk rotating in a Darcy porous medium saturated with nanofluid doped with gyrotactic micro-organisms. Anisotropic slip at the wall and blowing effects due to concentration are incorporated. The nano-bio transport model is formulated using nonlinear partial differential equations, which are transformed to a set of similarity ordinary differential equations (SODEs) by appropriate transformations. The transformed boundary value problem is solved by a Chebyshev spectral collocation method (CSCM). Impacts of key parameters on dimensionless velocity components, concentration, temperature and motile microorganism density distributions are investigated and graphically visualized. Validation with previous studies is included. It is found that that the effects of suction provide a better enhancement of the heat, mass and microorganisms transfer in comparison to blowing. Moreover, physical quantities decrease with higher slip parameters irrespective of the existence of blowing. Temperature is suppressed with increasing thermal slip, while nanoparticle concentration is suppressed with increasing wall mass slip. Micro-organism density number increases with the greater microorganism slip. Radial skin friction is boosted with positive values of the power law stretching parameter, whereas it is decreased with negative values. The converse response is computed for circumferential skin friction, nanoparticle mass transfer rate and motile micro-organism density number gradient. Results from this study are relevant to novel bioreactors, membrane oxygenators, food processing and bio-chromatography.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical investigation of Von Karman swirling bioconvective nanofluid transport from a rotating disk in a porous medium with Stefan blowing and anisotropic slip effects

Bég¹,

Kabir

Uddin

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…The numerical technique of the Chebyshev pseudospectral differentiation matrix (ChPDM) is applied to solve Equations ( 14) and ( 15) subject to the boundary conditions (16). The works of Aly et al [23], Guedda et al [24], Aly and Vajravelu [25], Aly and Sayed [26], Aly and Pop [27] contain more details about this approach. In particular, one supposes that the problem's domain is [0, η ∞ ], where η ∞ is the boundary-layer edge.…”

Section: Numerical Approachmentioning

confidence: 99%

Convective Heat Transfer of a Hybrid Nanofluid over a Nonlinearly Stretching Surface with Radiation Effect

Aly

Roşca

et al. 2021

Mathematics

Self Cite

View full text Add to dashboard Cite

The flow of the hybrid nanofluid (copper–titanium dioxide/water) over a nonlinearly stretching surface was studied with suction and radiation effect. The governing partial differential equations were then converted into non-linear ordinary differential equations by using proper similarity transformations. Therefore, these equations were solved by applying a numerical technique, namely Chebyshev pseudo spectral differentiation matrix. The results of the flow field, temperature distribution, reduced skin friction coefficient and reduced Nusselt number were deduced. It was found that the rising of the mass flux parameter slows down the velocity and, hence, decreases the temperature. Further, on enlarging the stretching parameter, the velocity and temperature increases and decreases, respectively. In addition, it was mentioned that the radiation parameter can effectively control the thermal boundary layer. Finally, the temperature decreases when the values of the temperature parameter increases.

show abstract

“…Torabi et al (2017) studied the conditions of total entropy production rate of the interface entropies in micro-channels with and without velocity slip and temperature jump. Aly and Sayed (2017) studied the effects of velocity slip on the velocity and heat transfer of four nano-fluids on a non-linear stretched sheet. Kayalvizhi et al (2016) discussed the effects of velocity slip on the heat flux and mass flux of a viscous conductive fluid flowing on a stretched sheet in the presence of viscosity dissipation, ohmic losses and thermal radiation.…”

Section: Introductionmentioning

confidence: 99%

Fluid-structure interaction on the dynamic characteristics of the hydrostatic spindle in micro-scale

Chen

Zhao

Zha

et al. 2019

ILT

View full text Add to dashboard Cite

Purpose The purpose of this paper is to investigate the effect of fluid–structure interaction in micro-scale on the performance of the hydrostatic spindle and improve the analysis precision of the dynamic performance of hydrostatic spindle. Design/methodology/approach Dynamic analysis of hydrostatic spindle before and after fluid–structure interaction is carried out according to stiffness and damping performance of the bearing, which demonstrates that the natural frequency and peak response of the spindle are increased in the micro-scale. Findings It is concluded from the simulation and experimental results that there is micro-scale effect in the actual operation of the spindle system and slippage exists in the oil film flow. The error between the modal detection result and the theoretical value is within 10 per cent, which also verifies the correctness of the above conclusions. Originality/value This paper analyzes the changes of the bearing performance parameters at macro- and micro-scale, which present the influence of the static and dynamic performance of the spindle in the micro-scale.

show abstract

Magnetohydrodynamic and thermal radiation effects on the boundary-layer flow due to a moving extensible surface with the velocity slip model: A comparative study of four nanofluids

Cited by 32 publications

References 44 publications

Numerical investigation of Von Karman swirling bioconvective nanofluid transport from a rotating disk in a porous medium with Stefan blowing and anisotropic slip effects

Numerical investigation of Von Karman swirling bioconvective nanofluid transport from a rotating disk in a porous medium with Stefan blowing and anisotropic slip effects

Convective Heat Transfer of a Hybrid Nanofluid over a Nonlinearly Stretching Surface with Radiation Effect

Fluid-structure interaction on the dynamic characteristics of the hydrostatic spindle in micro-scale

Contact Info

Product

Resources

About