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Ferromagnetic hybrid nanofluids can be employed in electronics and microelectronics cooling applications to minimise the accumulation of heat and effectively eliminate excess heat. By increasing the heat transfer rate, these nanofluids serve to maintain suitable operating temperatures and avoid device overheating. This study examines the influence of convective heating on the fluid flow of a three-dimensional ferromagnetic Casson hybrid nanofluid (composed of Mn-ZnFe2O4/CoFe2O4 nanoparticles) over a radiative Riga sensor device. The investigation takes place within a permeable medium characterised by Darcy–Forchheimer dynamics. Additionally, the analysis incorporates the assessment of the interaction of viscous dissipation. To establish a standardised set of governing partial differential equations along with their associated boundary circumstances, suitable similarity transformations are implemented. Following this, the resultant transformed ordinary differential equations are efficiently solved using the bvp5c solver. The solution process employs the shooting technique facilitated by MATLAB software. The impact of these influencing factors was carefully observed and thoroughly analysed using graphical representations. Specifically, the effects of pertinent factors on shear stress and heat transfer rates are concisely depicted in tabular formats.

The study aims to investigate the heat transfer efficiency in a hybrid nanofluid flow consisting of silver–molybdenum tetra sulphide (Ag–MoS4) with variable magnetism. The Yamada–Ota model is incorporated to account for viscous dissipation and heat source/sink effects, providing a comprehensive understanding of the fluid flow characteristics. However, the dissipative heat along with thermal radiation combined with the hybrid particles enriches the flow properties. The proposed model is simplified to its corresponding non-dimensional form for using proper similarity rules, and the set of transformed problems is handled numerically by employing the in-house MATLAB function bvp5c. The research utilizes a new statistical approach based on response surface methodology (RSM) and sensitivity evaluation to enhance the overall heat transmission performance. The work is conducted to obtain the relevant data on heat transfer rate. The concentration of nanoparticles, thermal radiation, and heat source are selected as the key parameters affecting the heat transfer efficiency. RSM is employed to optimize these parameters and determine the optimal conditions for enhanced heat transfer rate. Furthermore, the sensitivity analysis is performed to evaluate the efficiency of individual parameters on heat transportation. The findings of this study demonstrate that the hybrid nanofluid flow of Ag–MoS4 exhibits improved heat transfer efficiency compared to conventional fluids. Further, the Yamada–Ota conductivity model is also influential in enhancing the heat transfer properties.

Rotating surfaces are used as essential tools for certain engineering applications such as mixing processes, rolling mills, bearings and seals, etc. Rotating surfaces in engineering applications generate heat, and incompressible flows are often employed in cooling systems to maintain optimal operating temperatures. Leading researchers attempted a variety of approaches to figure out the many physical characteristics. In the present study, the hydromagnetic effect and the radiation‐induced rotational stretching/shrinking interface of a dissipative hybrid nanofluid are examined while accounting for joule heating. The hybrid water‐based solution which generates the nanofluid is composed of silver and molybdenum tetra sulphide particles. The implications of viscous dissipation, thermal radiation and also the heat source are all taken into account in the governing equations for flow and heat transmission, which are built using conservation laws. To observe particle form effects on the characteristics of a nanofluid the Hamilton–Crosser model is also take into consideration. A magnetic field is incorporated into the study in order to determine magnetohydrodynamics (MHD) influences the flow characteristics. The modelled problem equipped with aforesaid properties are transformed to ordinary for the suitable choice of similarity rules and then numerical technique is adopted to handle the governing equations. The influence of many features such as the shape factor, magnetic field, and joule, are carefully examined in the study. [ABSTRACT FROM AUTHOR]

The performances of the heat transfer due to dissipative heat likely magnetic dissipation is a challenging field of research because of it's diversifies applications in industries and engineering. Particularly, nowadays, in biomedical field of research the implementation of dissipation along with thermal radiation is vital. Based upon the current scenario, the present investigation leading to the role of magnetic dissipation vis‐à‐vis thermal radiation on the water‐based hybrid nanofluid past an electro‐magnetized elongating surface associated with melting boundary conditions. The adaptation of the transformed rule particularly, similarity rules are useful to convert the proposed set of problems in to ordinary. Further, shooting‐based numerical technique is proposed to handle the governing equations. The interesting and novel approach in this topic is the use of robust statistical technique, that is, response surface methodology for the optimizing Nusselt number for the use of various factors. Moreover, the validation is obtained by conducting a hypothetical testing using analysis of variance (ANOVA) which conforms a best output model for appropriate response. Further, the major outcomes of the study are depicted as; the unsteadiness parameter decelerates the velocity profile of the hybrid nanofluid for the interaction. However, the increasing particle concentration favours in enhancing the heat transport phenomenon. [ABSTRACT FROM AUTHOR]

This paper analyzes the heat transport phenomena of two-phase nanofluid within a permeable circular segment with an interaction of Arrhenius activation energy and, examines the interaction of convective boundary conditions affecting the flow characteristics. The pre-exponential factor of the Arrhenius equation deals with the collision between molecules, and it has significant applications for getting the rate of a chemical reaction and is used to estimate material properties with changes in temperature and energy. To a greater extent, the external uniform heat source encourages thermal properties on account of the behavior of Brownian and thermophoresis parameters. The transformation of the standard nondimensional form of the governing equations is obtained for the assumption of appropriate similarity variables and stream function. The set of these transformed equations is tackled numerically with the shooting technique. The characteristics of physical parameters on the flow phenomena are presented graphically and the validation with earlier research displays a strong correlation for the specific case. The special attraction of the present investigation is the regression analysis for the simulated results of heat and solutal transfer rates using Response Surface Methodology considering various characterizing parameters like heat source, thermal radiation, curvature, activation energy, thermal and solutal Biot numbers within certain range. [ABSTRACT FROM AUTHOR]