Shape Factor and Sensitivity Analysis on Stagnation Point of Bioconvective Tetra-hybrid Nanofluid over Porous Stretched Vertical Cylinder.

The current study presents the stagnation point of tetra-hybrid nanofluid blood flow over a vertical stretching cylinder. Stratification phenomenon and thermal radiation effects are considered and filled with porous structure of tissues. Adding motile microorganisms to the blood flow to examine the bioconvection phenomenon is a key part of this study. Ag, MoS₂, SWCNT, and MWCNT are considered for enhancing thermal transmission rate, and comparisons are done for di-hybrid, tri-hybrid and tetra-hybrid nanofluids flowing in the blood stream. Numerical results are computed using the fifth-order Runge-Kutta-Fehlberg method. The impacts of non-dimensional parameters are figured out graphically in velocity, energy, concentration, and density of microorganism profiles and explained in detail. Validation of current result with distinct values of the curvature parameter and volume fraction is found to be in excellent agreement. Heat transfer, mass transfer rate, and drag force are discussed via bar graphs for important physical parameters such as Hartmann number, Prandtl number, and Schmidt number, and their results are investigated. Sensitivity analysis is done for design optimization and parameters results are discussed to fix good-to-fit data. The measured outcomes demonstrate that the thermal radiation parameter has the maximum heat transfer rate, and the major results of the current study are that sphere-shaped nanoparticles have an efficient heat transfer rate 16.3% higher than other geometry. Tetra-hybrid nanofluids have efficient heat transfer rate 2.99% higher than hybrid nanofluid. The discussed results have significant applications in atherosclerosis treatment, drug delivery, deep tissue penetration for targeted treatment, and neurotherapy. [ABSTRACT FROM AUTHOR]