Mixed convective thermally radiative viscoelastic hybrid nanofluid flow in a vertical channel: Entropy generation analysis

Modern Physics Letters B, Journal Year: 2023, Volume and Issue: 38(04)

Published: Aug. 31, 2023

The utilization of a new category nanofluids, termed hybrid nanofluid, has recently been adopted to elevate the heat transfer rate. This research aims analyze significance thermal radiative flux and entropy generation on flow nanofluid within vertical channel. Specifically, Al 2 O 3 –TiO /CMC-water is assumed be produced by suspending nanoparticles alumina (Al ) titanium oxide (TiO in CMC-water (0.0–0.4%). equations governing problem are converted into set ordinary differential utilizing appropriate similarity conversions, which then solved through Homotopy Analysis Method (HAM). Brinkman number’s significant influence Bejan number regulation system discovered. results skin friction coefficient, rate, generation, depicted graphical representation, covering wide range parameter values.

Language: Английский

---

Entropy optimization and stability analysis in flow of quadratic radiative Ag−MgO / water hybrid micropolar nanofluid over an exponentially contracting permeable Riga surface

International Journal of Modelling and Simulation, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 30

Published: Jan. 10, 2024

Driven by the significant thermal relevance of low-conductivity electrically active fluids and their impact on controlling flows across multiple industrial engineering domains, this study aims to thoroughly investigate primary behavior electro-magneto-non-Newtonian micropolar Ag−MgO/H2O hybridized nanofluid, specifically focusing its flow dynamics heat transfer characteristics over an exponentially contracting porous Riga surface. The surface, exceptional electromagnetic sensor holds potential applications in micro-coolers, submarines, nuclear reactor management systems. These findings hold due prevalent use nanofluids cooling minute electronic components such as microchips associated equipment. Our innovative objective is emphasize influence plate conjunction with characteristics, quadratic radiant energy, convective conditions, velocity slip at boundary various key parameters. parameters include coefficient shear stress, couple-stress, factor (Nusselt number), entropy generation, distribution, micro-rotation or angular velocity, temperature profiles. We successfully tackled highly intricate coupled partial differential equations employing numerical techniques within MATLAB programming platform. Specifically, we utilized a fourth-order method known bvp4c address challenging value problem. outcomes revealed existence dual solutions characterized stable upper solution branch unstable lower region sheet. Notably, observation occurred under specific conditions related mass suction parameter. identification critical values cases prompted subsequent stability analysis discern nature these solutions. Two distinct have been identified for λS<λ, reaching termination λ=λS region. first yields positive minimum eigenvalue (β1>0), indicating stability, while second results nonpositive (β1<0), implying instability. Graphical representations illustrate substantial enhancement nanofluid both branches, notably influenced radiating parameter, Eckert number, Biot number. Moreover, magnetic interaction number parameter affect motion branch. Interestingly, it has observed that stress couple coefficients exhibit upward trend increasing value. However, number) might decrease case solution. This research direction optimize compositions, aiming minimize generation maximizing desired properties. Such endeavors are crucial steps towards fostering more efficient sustainable practices, aligning overarching objectives enhancing energy utilization promoting growth.

Language: Английский

---

Numerical investigation of magnetized nanofluid flow with thermal radiation and homogeneous/heterogeneous reactions over a vertical cylinder

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 50, P. 103424 - 103424

Published: Sept. 1, 2023

Nanofluid flow has gained attention due to its promising applications in numerous industries. Nanofluids exhibit a significant advantage over conventional fluids their superior heat transfer capability, attributed the presence of nanoparticles that enhance thermal conductivity, resulting improved dissipation and efficiency. Current research aims numerically investigate impact homogeneity heterogeneity on mixed convection incompressible viscous nanofluids through vertically permeable cylinder under suction/injection circumstances. The study also considers radiation source/sink phenomena. Ethylene glycol is utilized as base fluid, while include silicon carbide SiC Titanium dioxide TiO2. mathematical model, based nonlinear partial differential equations (PDEs), converted into ordinary (ODEs) by using suitable similarity transformations pronounced system ODEs. To deal with this system, bvp4c shooting methods are used commercial software MATLAB solve these ODEs numerically. impacts parameters various quantities interest elaborated graphically. From obtained results it analyzed velocity field boosts up versus higher values nanoaprticle volume fraction. decreases increasing amount magnetic field. An increase observe rise parameter. good agreement between current published work noted.

Language: Английский

---

Engine oil enhanced performance with hybrid graphene-SWCNT nanomaterials over a Riga curvy surface

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 45, P. 102902 - 102902

Published: March 14, 2023

Hybrid graphene nanomaterials and single-wall carbon nanotubes (SWCNTs) saturated in a steady laminar viscous incompressible engine oil over permeable stretchable curvy Riga surface are focussed the present study. The effects of nanoparticle shape factor, volume fraction thermal radiation towards non-Newtonian flow considered. proposed partial differential governing equations initially transformed into non-linear ODEs aided with similarity expressions. Subsequently, numerical MATLAB's bvp4c package is utilized to solve equations. Then, parameters' influences on dimensionless velocity temperature distributions, reduced skin friction coefficient Nusselt number presented tabularly graphically. graphene-SWCNTs/engine has least velocity, yet greatest profile when φ1= 0.04 φ2= 0.02 It also observed that heat transfer performance enhances as values factor increase. lamina-shape highly recommended elevate hybrid for realistic applications. nanofluid consideration allows enhancement mass various engineering, technological industrial operations especially design submarines, reactors micro-coolers.

Language: Английский

---

On the hydrothermal features of MHD nanofluid flow over a differently shaped thin needle influenced by Hall current with nonlinear thermal radiation

Multidiscipline Modeling in Materials and Structures, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Purpose The investigation has appraised the problem of an incompressible laminar steady magnetohydrodynamic (MHD) nanofluid stream over three distinct slendering thin isothermal needles paraboloid, cylindrical and cone shapes. Water as a base liquid is assumed in this flow model. influences Hall current variable sorts magnetic forces have enriched our investigation. Energy concentration expressions consist thermophoresis Brownian migration phenomena. analysis thermal mass slips presumed model also been performed. Design/methodology/approach A relevant transformation implemented for alteration leading partial differential equations (PDEs) to with nonlinear ordinary form. Due strong nonlinearity foremost equations, solved numerically by embedding well-known RK-4 shooting practice. software MAPLE 2017 exploited reckoning entire computation. To enunciate investigated upshots, some graphical diagrams regarded here. According technological interest, we measured engineering quantities like Sherwood number, coefficient drag friction Nusselt number tabular customs. Findings obtained consequences support that intensifies fluid movement when needle shape, while superior velocity noticed cylindrical-shaped needles. transference heat responds inversely along growths slip factors. Originality/value No work performed on radiated variable-shaped under current, field different

Language: Английский

---