article · Numerical Heat Transfer Part B Fundamentals
Mathematical modelling and numerical simulations have been used to evaluate boundary-layer nanofluid flow containing gyrotactic microorganisms over a vertical Riga plate under electroosmotic forces. The system incorporates the combined effects of heat and mass transfer, Joule heating, and viscous dissipation. Non-linear partial differential equations describing the flow were converted into ordinary differential equations to examine the physical characteristics of the system under specific boundary conditions. The investigation reveals that increasing the Lewis number reduces the concentration and density profile of motile microorganisms. Furthermore, higher values of the chemical reaction parameter and the Casson parameter enhance the temperature distribution within the fluid. Notably, applying electroosmotic forces along bounding surfaces facilitates the separation and dewatering of microorganisms from incompressible solid and liquid mixtures.
Understanding how fluid movement, heat, and electric charges interact with microscopic organisms is essential for optimising fluid handling at minute scales. This research demonstrates how combining thermal and electroosmotic effects can control temperature profiles and isolate microorganisms from fluid suspensions, which is relevant for refining separation techniques in fluid mechanics.
The finding that electroosmotic forces facilitate dewatering and the separation of microorganisms from solid and liquid mixtures suggests potential applications in bioprocessing, water treatment, or filtration systems. Potential users include process engineers and system designers working with microfluidic separation. However, as this work is purely computational and based on theoretical mathematical modelling, it represents early-stage research that requires physical prototyping and experimental validation.
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This investigation studies the flow of a boundary layer with electroosmotic forces on a nanofluid with gyrotactic microorganisms along the vertical Riga plate. This sort of fluid movement necessitates specific mathematical techniques and numerical simulations. In addition, the boundary-layer flow is induced by the mass and heat transfer, Joule heating, and viscous dissipation. A mathematical model is simulated by non-linear partial differential equations (PDEs). The combination of PDEs is turned into a set of non-linear ordinary differential equations using proper transformations. Some analysis tools are used to investigate the morphological characteristics of the problem while applying suitable boundary conditions. The influence of parameters on the derived solutions is numerically and visually explained through sets of figures. It is elucidated that the concentration of the microorganisms reduces due to an increase in Lewis number which leads to a decrease in the motile microorganism's density profile. It is seen that the temperature distribution is improved when the chemical reaction and Casson parameter increase. In addition, we find that the application of electro-osmotic forces applied to the surfaces helps to dewater and separate microorganisms from incompressible solid and liquid mixtures.
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DOI: 10.1080/10407790.2024.2364767
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