Stagnation Point Flow of Bioconvective MHD Nanofluids over Darcy Forchheimer Porous Medium with Thermal Radiation and Buoyancy Effect

Modified starch, derivatives of cellulose and sodium alginate are shear thinning fluids which can be analyzed using hyperbolic tangent model as these fluids can be used as natural thickeners in the ink. Thus, the present article's intent is to study the flow conduct of hyperbolic tangent nanofluid in microchannel situated horizontally. The impact of viscous dissipation and magnetic field is recorded. The suction‐ injection is promoted at the walls of the microchannel. Two imperative slip mechanisms like Brownian motion and thermophoresis are accounted for the study. Entropy scrutiny is carried out for system effectiveness. To simplify the non‐linear equations certain non‐dimensional variables are used. The obtained mathematical formulations are solved using an efficient problem‐solving operation namely Runge–Kutta–Fehlberg 4–5th order method. The parameters attained are studied using graphical illustrations. The findings of this article comprehend that on enlarging Weissenberg number, flow field declines at the bottom wall and levitates at the top wall and the material power law parameter magnifies the velocity distribution. Entropy generated is maximum at top wall and minimum at the bottom wall for the Brownian motion parameter but the reverse manner is attained for thermophoresis parameter. Incorporating porous media to the microchannel for the flow of shear thinning fluid is useful in cell engineering, spotting particles and filtering.

Section: Introductionmentioning

confidence: 99%

Entropy scrutinization of magnetized‐hyperbolic tangent nanofluid in the microchannel stuffed by porous media

Felicita,

Venkatesh,

Gireesha

et al. 2024

Bioconvection heat and mass transfer across a nonlinear stretching sheet with hybrid nanofluids, joule dissipation, and entropy generation

Tanveer,

Aneja,

Ashraf

et al. 2024

Nanofluids plays a crucial role in enhancing heat transfer characteristics of ordinary fluids such as oil, water and many more. Nanoliquids possess numerous applications in heat transport phenomenon in plethora of fields such as micro electronics, biomedicines, engine cooling thermal management, chiller and heat exchangers. Keeping in view of the above mentioned facts, the objective of the current work is to examine the heat and mass transportation characteristics of hybrid nanofluid (Cu‐/water) along with ohmic dissipation (Joule heating) in the presence of gyrotactic mirco‐organisms (flows under the effect of gravity) which causes bioconvection. The entropy produced by the conducting hybrid nanofluid is investigated in the permeable media in the current problem. Through similarity transformations, partial differential equations that represent the issue are transformed into ordinary differential equations. The BVP4C method is used to numerically solve the equations. The impacts of auxiliary variables on velocity, temperature , concentration of hybrid nanoparticles , and density of motile micro‐organisms () are plotted with those of the variation in bioconvection rayleigh number, Schmidt number, and Bioconvection Schmidt number and examined carefully in detail. Velocity of the flow decreases when porosity factor and bioconvection rayleigh number enlarges. Microbial velocity decreases for rising Prandtl number. Entropy generation and Bejan number rises for higher volume fraction values The current investigation also included entropy analysis, which revealed that hybrid nanofluids create less entropy than regular nanofluids. The potential for hybrid nanofluids to be employed in heat transfer applications in a more environmentally responsible and effective way is the relevance of this research. It looks at the interaction between heat transmission through nanofluids and the presence of gyrotactic microorganisms, which may cause bioconvection. Such a multiphysics method is quite new and complex.

Implication of electromagnetohydrodynamic flow of a non‐Newtonian hybrid nanofluid in a converging and diverging channel with velocity slip effects: A comparative investigation using numerical and ADM approaches

Kezzar,

Nehal,

Ragupathi

et al. 2024

This study delves into the intricate interplay of magnetic and electric fields (EMHD) on the flow characteristics of a non‐Newtonian bio‐hybrid nanofluid, consisting of Ag+Graphene/blood, within converging and diverging geometries. The investigation takes into account the effects of velocity slip at the walls, offering a comprehensive examination of this complex fluid system. A novel bio‐hybrid nanofluid model was introduced, featuring a unique combination of Ag+Graphene/blood nanoparticles. To address this multifaceted problem, the research employed mathematical modeling based on nonlinear partial differential equations (PDEs), encompassing continuity and momentum equations. These PDEs were then transformed into a system of nonlinear ordinary differential equations (ODEs) through similarity transformations. The study explored both numerical and analytical solutions, with a particular focus on the application of the Adomian decomposition method (ADM). To validate the findings, the study compared the analytical results with those obtained using the HAM‐based Mathematica package and the Runge–Kutta Fehlberg 4th–5th order (RKF‐45) method in specific scenarios. Active parameters, including nanofluid volume fraction, slip factors, and the influence of magnetic and electric fields, were systematically examined to unveil their impacts on velocity and skin friction within this multifaceted nanofluid system. It is found that the skin friction coefficient decreases with the Increasing both the nanoparticle volume fraction, Hartmann number and the angle in both channels. Results obtained also reveal an in the converging section, higher Casson parameters lead to increased yield stress but are offset by the higher shear rates, resulting in a higher velocity profile. In the diverging section, the fluid resists flow due to the reduced shear stress, leading to a decreased velocity profile.