**5. Outcomes with Discussion**

In this section the impact of different parameters on velocity and temperature profile, drag force coefficient, and Nusselt number is described in the form of graphs and tables. In order to acquire the required outcome we fix the different flow parameters such as *M* = 0.7, *A*<sup>1</sup> = 0.5, γ<sup>1</sup> = 0.1, γ<sup>2</sup> = 0.5, *Sc* = 1, *Pr* = 6.7, γ = 0.5, *k*1 = 0.1, Ω = 0.1.

### *5.1. Radial and Axial Velocity Profile*

In Figures 2–9, the radial velocity *f*- (η) and axial velocity profiles *f*(η) is depicted for *Re*, parameters, scaled Stretching γ<sup>1</sup> and γ<sup>2</sup> and nanoparticle volume fraction φ. The solid line ( ) and the dashed line (—-) represent the single wall carbon nanotubes and multiwall carbon nanotubes respectively. Figures 2 and 3 show that the magnitude of radial *f*- (η) and axial velocity *f*(η) reduces for incremental value of *Re*. The fact is that for increasing values of Reynolds number causes the increase in resistive forces which reduces the motion of fluid. Magnitude of *f*- (η) and *f*(η) for multiwall carbon nanotubes is higher as compared with single wall carbon nanotubes. *f*(η) takes on negative values near the lower disks because upper disks are moving faster than the lower disks. Figure 4 depicts that *f*- (η) escalates in the vicinity of the lower disk and declines in the vicinity of the upper disks by enhancing the value of γ1, while the behavior of *f*(η) remain same throughout the system as shown

in Figure 5. But by the increase in the value of γ2, *f*- (η) increases in the vicinity of the lower disks and decreases in the vicinity of the upper disks, (see Figure 6), and *f*(η) shows decrease in magnitude throughout the system, (see Figure 7). Figure 8 shows that *f*(η) reduces by the increase of nanoparticle volume fraction and magnitude of *f*(η) is smaller for MWCNTs. *f*- (η) is decreasing near the lower disk and enhancing near the upper disks by increasing φ, while the amplitude of *f*- (η) is higher for MWCNTs than SWCNTs. This effect is shown in Figure 9.

**Figure 3.** Radial velocity profile *f*- (η) for *Re*.

**Figure 4.** Radial velocity profile *f*- (η) for γ1.

**Figure 5.** Axial velocity profile *f*(η) for γ1.

**Figure 6.** Radial velocity profile *f*- (η) for γ2.

**Figure 9.** Axial velocity profile *f*-(η) for φ.
