Three-dimensional numerical analysis of flow and heat transfer of bi-directional stretched nanofluid film exposed to an exponential heat generation using modified Buongiorno model

Abstract

The heat transfer characteristics of copper/water nanofluid flow over a bi-directional stretched film are theoretically studied. The used mathematical model accounts for nanofluid effective dynamic viscosity and thermal conductivity. The model of the current study utilizes the modified Buongiorno model to scrutinize the effect of haphazard motion, nanoparticles' thermo-migration, and effective nanofluid properties. 3D flow is driven by having the nanofluid film elongation in two directions. The thermal analysis of the problem considers the nonlinear internal heat source and Newton heating conditions. In modeling the problem, the Prandtl boundary layer approximations are employed. Moreover, the nonlinear problem set of governing equations for investigating the transport of water conveying copper nanoparticles was non-dimensionalized before being treated numerically. The current parametric study investigates the impact of governing parameters on nanoparticles velocities, temperature, and concentration distributions. The presence of copper nanoparticles leads to a higher nanofluid temperature upon heating. The temperature enhances with the nanoparticles Brownian movement and thermo-migration aspects. Furthermore, involving a heat source phenomenon augments the magnitude of the heat transfer rate. Moreover, the velocity ratio factor exhibits decreasing behavior for x-component velocity and increasing behavior for y-component velocity. In conclusion, the study results proved that for larger values of Nb and Nt the temperature is higher. In addition, it is clear from the investigations that the Lewis number and Brownian motion factor decline the nanoparticle concentration field.

Entropy analysis of slip flow second-grade Cu − EO and TiO 2 − EO nanofluids using Modified Buongiorno model

“…Owhaib et al [33] have explored Newtonian heating and radiation impact on Cu − H 2 O nanofluid flow via the MBM. Owhaib and Kouz [34] have analyzed three-dimensional Cu − H 2 O nanofluid flow past a bilaterally stretching sheet with the aid of MBM. Activation energy and double stratification consequences on rotating Maxwell nanofluid flow were scrutinized by Khan and Nadeem [35].…”

Thermal Flow for Radiative Ternary Hybrid Nanofluid over Nonlinear Stretching Sheet Subject to Darcy–Forchheimer Phenomenon

“…In light of the abovementioned assumptions, the equations that manage flow system can be described as [39,40]…”

MHD second-grade nanofluid slip flow over a stretching sheet subject to activation energy, thermophoresis, and Brownian effects

“…The Modified Buongiorno model (MBM) is applied to investigate the consequences of thermophoresis, nanoparticle volume fraction, and Brownian diffusion on flow, heat and mass transfer of nanofluids. Owhaib et al [29,30] have examined the Cu − H 2 O nanofluid 3-D flow influenced by radiation, exponential heat source and viscous dissipation. The authors have implemented the MBM to analyze the nanofluid properties.…”