Entropy generation analysis of CNT‐based nanofluid flows induced by a moving plate

Abstract

Carbon nanotubes have garnered considerable interest from academia and industry due to their unique properties and potential applications. This study examines fluid flow induced by a plate moving at a constant velocity towards/receding from normal stagnation point flow. The plate's surface is immersed with ethylene glycol and two types of carbon nanotubes: single‐walled and multi‐walled. The Reynolds number, proportional to the plate's velocity, governs the flow. Thermal transport analysis includes Ohmic heating, heat source/sink effects for constant wall temperature and prescribed surface temperature, and entropy generation analysis. Similarity ansatz is used to obtain non‐dimensional ordinary differential equations, and numerical and asymptotic solutions are computed using MATLAB's bvp4c routine (finite difference‐based approach). By varying the relevant parameters, the study interprets the behavior of entropy generation, Bejan number, skin frictions, Nusselt number, flow, and energy profiles. The numerical solutions are observed to match their asymptotic behaviors within an intermediate range of small and large Reynolds numbers for the wall stress parameter. The magnetic parameter produces a resistive force that reduces fluid flow but enhances the system's energy. Moreover, understanding the flow and heat transfer characteristics of CNT‐based nanofluids induced by a moving plate can provide insights into the design and optimization of thermal systems, including efficient heat exchangers used in power generation, chemical, and petrochemical industries.

Chemically reactive flow of non‐Newtonian nano‐liquid over different magnetized and slippery inclined surfaces

“…Particular type of flow in the form of Jeffery Hamel flow in combination with heat and mass balance phenomenon is addressed in the mathematical form of Equations ( 10), ( 11) and (17)(18)(19). This new determined physical and mathematical…”

“…However, many practical and significant impacts are incorporated in terms of vertical magnetic field, inclination angle, Brownian motion, thermophoretic force, viscous dissipation, heat generation/absorption, thermal radiation, slippery surface and stretching/shrinking surface. The problem is further demonstrated through flow Equation (9) with BCs (10) and thermal as well as concentration, respectively through Equations (16)(17)(18). The significant parameters appeared in flow equations in the form of Hartman number (𝐻𝑎), Casson liquid related number (𝛽), Reynolds number (Re), inclination angle (𝛼), stretching/shrinking related parameter (𝜒 > 0, 𝜒 < 0) and slip related parameter (𝛾 1 ) are tested for its importance in the flow problem through graphs.…”

“…Entropy production of 3D Bodewadt moment of suspended water and hexanol base material was explored by Hosseinzadeh et al [15]. Numerous researchers [16][17][18][19][20] studied heat transfer during nanoliquid flow. Shao et al [21] studied the Homann type nonaxisymmetric stagnation point motion of an unsteady Walter's B nanomaterial's motion on a vertical cylindrical disk.…”

Entropy and energy transfer analysis of a Maxwell thin‐film fluid over an inclined surface with viscous dissipation effect

“…On the contrary, a decrease in the Bejan number signifies an enhanced heat transport mechanism characterized by reduced entropy generation. Here, entropy generation is formulated [45][46][47][48][49][50][51] by using these features as heat transfer, viscous dissipation and magnetic effect.…”

Influence of Thermophoresis and Brownian Motion on MHD Hybrid Nanofluid MgO - Ag/H2O Flow along Moving Slim Needle

“…In [18], Anitha et al, investigate the thermal characteristics of a tangent hyperbolic fluid as it flows through a vertical micro channel. Sarfraz and Khan [19] conducted an investigation into the entropy generation analysis of nanofluid flows containing carbon nanotubes (CNTs) driven by the motion of a solid plate. Guled et al, [20] conducted research on the impact of MHD slip flow with radiation, suction/injection on heat transfer over a shrinking sheet.…”