**4. Graphical Results and Discussion**

In this portion, we will examine the impact of appropriate model variables on a thin layer flow of Casson nanofluid over a stretching upright cylinder. The main features of the flow, like surface drag force (coefficient of skin friction), the rate of heat transport (Nusselt number), and the rate of spray on the thin layer have been studied for both SWCNTs and MWCNTs nanofluids. The other physical parameters of interest, like the Casson parameter *β*, nanoparticles volume fraction *ϕ*, magnetic variable *M*, Grashof number *Gr*, Prandle number Pr, and Reynolds number Re, have been presented graphically and physically discussed for both cases of SWCNTs and MWCNTs nanoparticles. We considered the thin liquid flow and heat analysis of two kinds of CNTs (SWCNTs and MWCNTs) human blood-based nanoliquid. The schematic sketch and coordinate system of the present problem are displayed in Figure 1. The variation in the velocity field *d f*(*η*) *<sup>d</sup><sup>η</sup>* , thermal field Θ(*η*), and pressure field *<sup>p</sup>*−*pb <sup>μ</sup><sup>c</sup> <sup>f</sup>* (*η*) of blood flow against the different emerging parameters of magnitudes (*M* = 0.3, Pr = 24, *Ec* = 1.5, *ϕ* = 0.01, *α* = 1.4, *Gr* = 0.2, Re = 0.3) have been portrayed in the following figures for both sorts of CNTs.
