Hybrid Carbon Nanotube Flow near the Stagnation Region over a Permeable Vertical Plate with Heat Generation/Absorption

Abstract

This research explored the mixed convection flow past a vertical plate immersed in a hybrid carbon nanotube near the stagnation point. The hybrid carbon nanotube was synthesized by the mixture of two nanoparticles, namely multi-wall (MWCNT) and single-wall (SWCNT) carbon nanotubes immersed in water (base fluid). In addition, attractive aspects of suction/injection and heat generation/absorption effects were incorporated. Similarity variables were used to convert the partial differential equations describing the fluid into ordinary (similarity) differential equations before being solved numerically using Matlab software. The simultaneous impact of several parameters on velocity and temperature profiles, skin friction coefficient, and local Nusselt number were represented with graphs. Dual solutions were observed for some pertinent parameters, which led to stability analysis. This analysis interpreted that merely the first numerical solution is stable. In addition, hybrid nanoparticle, injection effect, and heat-generation parameters led to a decreased range of solutions, whilst the suction effect and heat-absorption parameters acted in the opposite manner. Besides, it is noted that the rate of heat transfer for hybrid carbon nanotube was higher when compared with carbon nanotube and ordinary fluid. Additionally, the heat absorption and buoyancy-assisting flow parameters magnified the heat transfer rate.

Magneto-hydrodynamic boundary layer flow and heat transfer of hybrid carbon nanotube over a moving surface

“…Thus, it is assured that the fluid flow and heat transfer of the current problem can be solved reliably using the present numerical method. The range of nanoparticle volume fraction (ϕ 1 , ϕ 2 ) used in this study is taken from the previous study by Anuar et al [8] which in the range of 0 ϕ 1 , ϕ 2 0.02. Next, moving parameter λ are taken over the range of −0.50 < λ < −0.40.…”

“…Recent experimental and numerical finding by Anuar et al [8] found that hybrid carbon nanotube had a higher rate of heat transfer when compared to carbon nanotube and conventional fluid. However, the above mentioned study is restricted to the problem in a permeable vertical plate.…”

“…Then, many researchers are interested in the study of hybrid carbon nanotubes that are formed by combining two types of nanoparticles which are single-wall and multi-wall carbon nanotubes into the base fluid. In recent works, several studies on hybrid carbon nanotubes with different type of surfaces and effects were explored [8][9][10].…”

Numerical Computation of Hybrid Carbon Nanotubes Flow over a Stretching/Shrinking Vertical Cylinder in Presence of Thermal Radiation and Hydromagnetic

“…Meanwhile, ref. [32] discourse the attractive aspects of suction/injection and heat generation/absorption effects in the flow. It is noted that the suction effect and heat-absorption parameters increase the range of the solution.…”

“…Motivated by the above aforementioned works, this paper decomposes the novelty in (i) utilizing hybrid carbon nanotubes as an essential component in improving the heat transfer effectiveness [32], (ii) adding the hydromagnetic effect for this problem due to its high potential capability especially in drug and gene delivery, cell separation and manipulation in bio-medical field [47,48], (iii) analyzing the thermal radiation effect in this current study as it enhances the rate of heat transfer [49], (iv) performing the stability analysis in order to identify the stability of the solution since non-unique solution is expected to exist. This contribution may benefit the scientists and academicians and give add-on value to their expertise.…”