Nusselt Number Decreases Research Articles

Effects of elasticity and waviness of the conductive panel surface on the cooling performance and entropy generation by using nano-enhanced multiple impinging jets

The design of cooling systems is crucial for the thermal management of many energy systems including batteries, microelectro-mechanical systems, photovoltaics and many others. In this study, cooling system for elastic curved conductive panel is developed by using nano-enhanced multiple jet impingement. ALE finite element modeling of the entire coupled fluid-structure conjugate heat transfer system is employed for assessment, which considers both elastic flat and wavy panels. Type of the panel and operating parameters affect the cooling performance and entropy generation. Different effects and contributions of varying parameters such as Cauchy number (Ca), jet-cooling spacing (to the target plate and between the slots), wave amplitude and number of the conducive panel and nanoparticle loading amount in the pure fluid on the cooling performance and entropy generation features are analyzed. Increases in the Cauchy number, waveform amplitude, slot-slot distance, and slot-plate distance reduce the effectiveness of cooling, whereas increases in the nanoparticle loading have the reverse effect. When varying the Ca, there is 12.1% decrease of average Nusselt number (Nu) while average panel temperature rise becomes 3.1°C by using nanofluid. The average Nu deteriorates by 7.7% and 6.6% when amplitude and wave number are varied while the corresponding temperature rises are achieved as 1.4°C and 1°C. When wavy and flat surfaces are used, using nanofluid provides 2.8°C and 2.5°C temperature drops. Lower entropy generation (EG) is obtained with flexible panel while higher amplitude of the wave form and increasing the nanoparticle amount result in EG reduction. The amount of EG reduction by using nanofluid becomes 21% and 27% at the highest loading.

Nanoparticle shape effects on MHD Cu–water nanofluid flow over a stretching sheet with thermal radiation and heat source/sink

This study provides an insight into the effects of various nanoparticle shape factors on magnetohydrodynamic boundary layer flow and heat transfer over a stretching sheet. Choosing appropriate nanoparticles can control velocity and heat transfer. A magnetic field is part of the momentum equation, and the effects of radiation and heat source/sink are part of the energy equation. Equations governing the problem are converted into nonlinear ODEs by similarity transformation. Afterwards, Runge–Kutta fourth-order scheme combined with shooting technique is employed. A magnetic field and porosity decrease the velocity. Radiation and a heat source/sink both escalate temperature. The Eckert number and porosity also improve the temperature. As nanoparticle volume fraction increases, the Nusselt number decreases and skin friction increases. Among the nanoparticle shapes considered in this study, platelet-shaped nanoparticles have the best flow and heat transfer performance. According to the studies we examined, the results obtained are consistent with those previously published.

Conjugate Radiation and Convection Heat Transfer Analysis in Solar Cooker Cavity Using a Computational Approach

The heat loss caused by radiation and persistently laminar natural convection in a solar cooker cavity that has a rectangular cavity or a trapezoidal cavity are computationally explored in this paper. The hot bottom and the adiabatic side wall are both taken into account. Two possibilities are considered for the top wall: first, a cold wall, and, second, losses from wind-induced convection and radiation. The parameters of heat loss in various depth cavities have been investigated along with a variety of external heat transfer coefficient values above the glass surface were simulated. The emissivity of the bottom surface, the absolute temperature ratio, on heat loss from the considered geometries, are also calculated. Analysis of the cavity’s flow pattern and isotherms at different depths has been conducted, and it is discovered that the total rate of heat transfer from the top wall increases as the bottom wall’s emissivity, the absolute temperature ratio, the Rayleigh number, and the external Nusselt number all increase. While radiation heat transfer increases monotonically, convective heat transfer rates shift slightly as these values rise at different emissivities of the bottom, and the opposite occurs when Ra increases at the same emissivity. Furthermore, it has been discovered that as the aspect ratio of the cavity increases, the overall Nusselt number decreases. A trapezoidal cavity has a faster rate of heat transfer than a rectangular cavity for the same parameters. Generic empirical correlations were developed for the total average Nusselt number concerning all influencing parameters.

Finite element and neural computations for energy system containing conductive solid body and bottom circular heaters utilizing Ag–MgO (50:50)/water hybrid nanofluid

This study investigates the natural convection of a hybrid nanofluid containing Ag–MgO (50:50) nanoparticles in water in a trapezoidal enclosure under the influence of Lorentz force. The cavity is heated from below by two semi-circular heaters containing a conductive solid body at the center. Galerkin finite element method is used to analyze the effects of various parameters such as Rayleigh number (103≤Ra≤106), conductivity ratio (10−2≤kr≤102), nanoparticle volume fraction (0≤ζ≤2%), Hartmann number (0≤Ha≤100), aligned magnetic field with angle (0o≤λ≤60o), side of solid central body (0.1L≤Ls≤0.4L) and diameter of circular heater (0.05L≤Dc≤0.4L) on heat transfer. The average Nusselt number decreases by 15%–20% with increasing cavity angle from 5 to 20 degrees (at Ra=5×104 and Ha=5), but adding just 1% of hybrid nanoparticles results in a 10% boost in heat transfer. Various training algorithms, including BFGS quasi-Newton, Resilient backpropagation, One step secant, Conjugate gradient, Bayesian regularization, and Levenberg Marquardt, are compared based on accuracy and computational time for input data generated from seven controlling parameters of heat transfer. Finally, the Levenberg Marquardt algorithm is used on two data sets for hot and cold walls with optimal neurons, and the genetic algorithm is used to predict the optimal values of the Nusselt number in a search space, which are verified with the particle swarm optimization algorithm. The minimum and maximum values for hot walls (Case I) were found to be 3.8005 and 17.5341, respectively, while for cold walls (Case II), the values were 0.9213 and 4.4434, respectively. These findings are significant for designing and optimizing cooling systems in various industries, including aerospace, automotive, and electronics.

Correlations of Heat Transfer and Fluid Flow Data for Lattice Brick Settings in Tunnel Kilns

This paper proposes correlation equations of heat transfer and pressure drop for the design and operation of tunnel kilns loaded with lattice brick settings of different geometrical parameters in the form of Nusselt number and friction factor. The developed correlation equations considered parameters that were not investigated in previous studies, such as the relative roughness of the bricks and the stack channels, and they also extended the Reynolds numbers to a practical range that was not covered before in a simple, practical form. The correlation equations are valid for Reynolds number between 125 and 10,200, Prandtl number between 0.68 and 0.73, brick’s relative roughness between 0.23 and 0.93, voidage fraction between 0.48 and 0.653, and the geometrical parameters of the tested lattice brick settings. The achieved correlations of the Nusselt number and the friction factor are well compared with the available correlations in the literature in their valid range of parameters. It is found that Nusselt numbers and the friction factors for low-density are higher than those of high-density settings for all considered parameters except the voidage fraction. The effect of the considered parameters confirms that Nusselt numbers increase and the friction factors decrease substantially with the Reynolds number and slightly with the Prandtl number. At a constant Reynolds number, both the Nusselt number and the friction factor increase as the brick’s relative roughness is increased. Moreover, as the stack channel spacing is increased, the Nusselt number decreases, and the friction factor increases. The voidage fraction of the setting has a monotonic effect on both Nusselt numbers and friction factors. Nusselt numbers for high-density are higher than those for low-density settings as the voidage fraction varies.

Dual solutions of a nanofluid flow past a convectively heated nonlinearly shrinking sheet

Effects of magnetic field, convective heating and thermal radiation on the dual solutions and boundary layer separations of nanofluid flow over a nonlinearly shrinking sheet are investigated. Shrinking sheet problems may have applications in polymer technology where one deals with stretching/shrinking of plastic sheets and in metallurgy that involves the cooling of continuous strips. The new type of shrinking sheet flow is essentially a backward flow and it shows physical phenomena quite distinct from the stretching flow case. Governing equations of the problem are reduced to a system of dimensionless equations using similarity transformations. The resulting equations are solved using the well-known shooting method. A comparison between the present solutions and the available data shows a good agreement. Higher volume fraction of nanoparticles causes a decrease in skin friction coefficient and local Nusselt number. The converse is observed for increasing suction parameter. Local Nusselt number is substantially increased by larger shrinking index parameter and Biot number. An increase in suction parameter and magnetic parameter leads to diminish the boundary layer separation and the domain of existence of dual solutions. But the reverse is observed with higher volume fraction of nanoparticles and shrinking index parameter. For increasing nanoparticle volume fraction and decreasing suction parameter the velocity decreases and the temperature increases.

Numerical investigation on forced, natural, and mixed convective heat transfer of n-decane in laminar flow at supercritical pressures

The present study numerically investigates the forced, natural, and mixed convective heat transfer characteristics of supercritical n-decane in a tube in laminar flow, focusing on the law of mutual coupling of forced and natural convection in mixed convection. Effects of heat flux (100 W/m2–8000 W/m2) and flow direction on heat transfer are investigated. For forced convection, deterioration occurs when the wall temperature reaches the pseudo-critical temperature and the local Nusselt number decreases by up to 17.4% compared to the theoretical value at the heat flux of 2400 W/m2. For natural convection, heat transfer is continuously enhanced with the increase of heat flux. For mixed convection in upward flow, heat transfer is enhanced by the buoyancy of increasing the fluid velocity gradient near the wall. As for the downward flow, buoyancy illustrates the opposite effects. Based on numerical simulation results, the Nusselt number correlations are proposed for forced and natural convection respectively and the correlation for mixed convection is modeled employing a function of the forced and natural convection.

Effect of Wall Electrical Conductivity on Heat Transfer Enhancement of Swirling Nanofluid-Flow

Effects of electrical conductivity of cylindrical walls on both heat transfer enhancement in nanofluid swirling flow and fluid layers produced in a cylindrical container are numerically analyzed. A temperature gradient and external magnetic field are imposed in the axial direction on the rotating flow which is moved by the bottom disk. The governing equations that describe the combined problem (MHD and mixed convection) under the adoptive assumptions are solved numerically by the finite volume technique. Calculations were made for fixed Reynolds number (Re = 1000), Richardson number (0 ≤ Ri ≤ 2), aspect ratio (H/R = 2), Hartmann number (0 ≤ Ha ≤ 60), and solid nanoparticle (copper) with volume fraction (Φ = 0.1). A decrease in the mean Nusselt number was found with the increase of the Richardson number due to stratification layers. These latter limits the heat transfers between the hot and cold zones of the cylinder. The results indicate that the Nusselt number gets bigger within a certain range of Hartmann numbers, and especially when the rotating lid is electrically conducting. Indeed, average Nusselt number decreases while the Hartmann number increase after it exceeds a critical value. Finally, the electrical conductivity of the rotating lid plays an important role in heat transfer enhancement in nanofluid swirling flow.

Experimental investigation of natural convection of Fe3O4-water nanofluid in a cubic cavity

Convective heat transfer of nanofluids has been an active research topic in recent times. But the relative amount of research in natural convection of nanofluids is scarce in comparison with forced convection. In this study the effect of Fe3O4/water nanofluid on the natural convection behavior in a differentially heated cubic cavity of characteristic length 30 mm has been investigated. The nanofluids are synthesized using a two-step approach and their thermophysical properties like thermal conductivity and viscosity are measured in the temperature ranging from 20 to 60 ° C . The effect of nanoparticle volume fraction on heat transfer performance is studied with concentration ranging from 0–0.8% by volume. The cavity is made up of Poly-lactic acid (PLA) with two sides covered with copper plates. One of the copper plates is kept in contact with ambient atmosphere while variable heat flux using silica gel heater is applied on the other copper plate. All previous results have shown either monotonous deterioration or an increment followed by a continuous decrease in heat transfer coefficient and Nusselt number with increase in concentration. The results of this study have shown that for constant input heat flux the Nusselt number decreases monotonously. Further it is observed that for constant Rayleigh number there is an increase in Nusselt number with increase in concentration.

Computational study and characteristics of magnetized gold-blood Oldroyd-B nanofluid flow and heat transfer in stenosis narrow arteries

Nanofluids are incredibly helpful to researchers because of their higher rates of heat transfer that have huge industrial usages. We discuss blood flow via a tiny artery with a stenosis in the appearance of heat and mass transfer in the existing critique. The non-Newtonian blood flow in narrow artery is mathematically investigated by depicting the blood as Oldroyd-B fluid. The major intention of this investigation is to investigate the impact of MHD in Oldroyd-B nanoliquid flow with gold (Au) nanoparticles (NPs) on stenosis arteries. The properties of heat transfer with joule dissipation are being examined. The base fluid for nanoparticles is blood. Appropriate transformations are exploited to convert the nonlinear PDEs that govern the system into nonlinear ODEs. The numerical results of these ODEs are determined using the Homotopy analysis method (HAM). Flow anticipates for every physical quantity is also investigated. Physical explanations are utilized to illustrate the physical effects of flow limitations versus assumed fluid flow. The results show that as the volume fraction, flow, and relaxation parameters increase, so does the velocity contour. The nanofluid temperature is decreased for the volume fraction and Prandtl number. In addition, the drag force and heat transfer explanations for blood flow dynamics are being investigated. As the flow parameter values increase, the Nusselt number decreases and the drag force increases. The modelling and numerical solution serves an essential role in trying to predict the cause of atherosclerosis.

Heat Transfer Enhancement of Partially Serrated Twisted Finned Tube Bank

Due to the large thermal resistance on the airside of the air-cooled heat exchangers, it is necessary to improve heat transfer performance and reduce flow resistance by improving the fin structure. In this paper, partially serrated finned tube bank was proposed and numerically investigated. The experimental system of finned tube bank was built to verify the correctness of the numerical simulation. The finned tube bank is twisted and serrated on the windward side to enhance heat transfer. Moreover, the non-grooved sector region on the leeward side reduces the flow resistance and improves the temperature uniformity of the fins. The effects of fin twisting of the windward side and non-grooving angle of the leeward side were explored. Nusselt number and friction factor decrease as the leeward non-grooving sector region increases. The correlations of Nusselt number and friction factor were derived based on the simulation results of partially serrated twisted finned tube banks with 120° non-grooving region on the leeward side. Nusselt number, friction factor and comprehensive heat transfer coefficient of partially serrated twisted finned tube bank are 13.3%, 13.0% and 10.5% higher than that of annular finned tube bank with Reynolds number from 6200 to 20,600, respectively.

Numerical Study of Natural Convective Heat Transfer in an Air Filled Square Cavity Heated from Below and Symmetrically Cooled from the Sides with a Partition in the Hot Wall

A two-dimensional numerical study of laminar natural convection in a square enclosure filled with air with a wall partially heated on the bottom is presented. The heat source is located on the lower wall with different heated widths varied from 20 to 80%(ε = 0.2–0.8) of the total width of the lower wall and different heights h = H/4 and H/2 of the partition. The effect of the partition height on the main system dynamics is investigated through solution of the two-dimensional Navier–Stokes equations and the energy equation by means of a finite volume method based on the SIMPLE algorithm. The influence of the Rayleigh number (Ra = 103 to 106) and the hot wall length is also examined. It is shown that the average Nusselt number grows when ε increases and when h decreases. For a given value of ε and h, the average Nusselt number increases as Ra increases. It is concluded that the partition height causes a decrease in the average Nusselt number.

NATURAL CONVECTION FLOW AND HEAT TRANSFER IN AN L-SHAPED CAVITY PARTIALLY FILLED WITH POROUS MEDIUM: NUMERICAL ANALYSIS

In an L-shaped cavity partially filled with a porous material, natural convection flow and heat transfer are quantitatively investigated. The effect of numerous significant parameters on isotherms, streamlines, and heat transport characteristics is investigated within the enclosure. The Rayleigh number, Darcy number, effective heat conductivity of the porous medium, aspect ratio, and thickness of the porous layer are all investigated. The governing equations are solved using the Galerkin technique with weighted residuals. The findings of this study demonstrate that an L-shaped cavity exhibits fascinating properties. As a result, as the aspect ratio of the L-shaped cavity increases, the average Nusselt number decreases. Furthermore, raising the Rayleigh number, as well as the effective thermal conductivity of porous media, improved the average Nusselt number. In the case of natural convection, the thickness of the porous layer is shown to be inconsequential.

Numerical research on the flow and heat transfer characteristic of impingement cooling with return holes

Jet impingement cooling is usually used in zones with extremely high thermal loads. The major factor that limits impingement heat transfer uniformity is the crossflow. The impingement cooling with return hole is applied to reduce the negative effect of crossflow on the target surface heat transfer in present paper. The influences of jet-to-plate spacing (H/D), impingement target surface curvature (α), temperature ratio (TR) and Reynolds number on flow field and heat transfer performance are investigated in detail. The results indicate that the correlation between the overall area average Nusselt number of target surface and H/D, the overall area average Nusselt number decreases by approximately 5.76% with H/D increases by one unit. Increasing the impingement target surface curvature is beneficial to expand the spanwise heat transfer. The overall area average Nusselt number increases by 295.5% for Reynolds number varying from 10,000 to 50,000 at TR = 0.910, and the overall area average Nusselt number increases by 8.68% for the TR varying from 0.668 to 0.910 at Re = 30,000. The results indicate that impingement cooling with return hole can achieve high heat transfer coefficient and uniform heat transfer distribution.

Effect of surface structure on flow and heat transfer using lattice Boltzmann method in a microchannel exchanger

The D2Q9 multiple relaxation time (MRT) model and D2Q5 MRT model of lattice Boltzmann method are proposed for the fluid flow and heat transfer in a microchannel exchanger. The appropriate flow and thermal boundary conditions are adopted by non-equilibrium extrapolation method. The performance of heat convection between cold fluid and hot wall in rectangular microchannel is simulated and the results are verified through experiments by Liu et al. and previous numerical results by Ebrahimi et al. Effects of structured surface with rectangular, hemispherical and triangular micro-bulges on the flow behavior and heat transfer of fluid are analyzed. Simulated results indicate that the structured heat transfer surface can effectively enhance the heat transfer, the surface with rectangular micro-bulges for the best performance. Subsequently, the optimal ratio of the micro-bulge height to the micro-channel height of 0.25 is obtained based on the relative Nusselt number of rectangular structured surface, and the Reynolds number decreases with the increase of the micro-bulge height, and the relative logarithmic temperature difference is the opposite. The relative Nusselt number and relative logarithmic temperature difference decrease first and then increase with the increase of micro-bulge distance, while the Reynolds number changes on the contrary. The effect of micro-bulges interval on the heat transfer efficiency is less than that of micro-bulge height, and the thermal efficiency is increased by 15% with an optimal height and distance of the rectangular micro-bumps in the microchannel.

Experimental and Numerical Analysis of Forced Convection in a Horizontal Tube Partially Filled with a Porous Medium under Local Thermal Equilibrium Conditions

The objective of the present work is to analyze experimentally and numerically the laminar forced convection flow in a horizontal pipe partially filled with a porous medium under constant heat flux and to study the influence of the eccentricity of the porous medium on the results. In a numerical analysis, the governing equations are solved in three dimensions. To simplify the grid generation and the satisfaction of the boundary conditions, conformal mapping is applied to convert the cross-section of the tube in the fluid domain (space between two eccentric circles) into a rectangle, and the equations are solved in a computational domain in this domain. The Darcy–Brinkman–Forchheimer model is applied to simulate the hydrodynamic behavior of the flow in the porous region. Thermal equilibrium between solid and fluid is assumed for the energy equation. A FORTRAN program was developed to solve the equations using the finite volume method and the SIMPLE algorithm. Velocity profile, pressure drop and average Nusselt number are studied in a wide range of Darcy numbers, thickness of porous mediums and eccentricities. The results show that the eccentricity of the porous material reduces the heat transfer coefficient and the pressure drop simultaneously; of course, the reduction in the heat transfer coefficient is less noticeable when the thickness of the porous medium is smaller. For example, at RP = 0.5, when the eccentricity of the porous medium increases up to E = 0.4, the average Nusselt number decreases by 66%, and this reduction for a smaller porous thickness decreases to 11%. The maximum pressure drop reduction for Da = 10−5 and E = 0.4 is 25%.

Analysis of thermal radiation in magneto-hydrodynamic motile gyrotactic micro-organisms flow comprising tiny nanoparticle towards a nonlinear surface with velocity slip

This study investigates 2D bioconvection magneto-hydrodynamic (MHD) flow and heat transfer of the non-Newtonian (Casson) nanofluid model. The phenomenon of Brownian motion and thermophoresis containing gyrotactic microorganisms over a nonlinear surface is demonstrated pictorially under the simultaneous impact of thermal radiation and velocity slip. Herein, the flow is electrically conducting where different cases and the effect of convergence parameters such as chemical reactions and heat generation/absorption are studied. The transformed ODEs are tackled numerically by employing the Bvp4c scheme. This method contains three-stage Lobatto IIIa collocation formula that provides continuous solutions up to fifth-order accuracy. The salient features of relevant flow parameters are illustrated through tables and graphs, and the current results are compared with the previous ones, which claim considerable agreement. The main finding reveals an increase in the thermophoresis parameter (Nt) and radiation (R) parameters, uprising the temperature profile which leads to enhancement in the thermal boundary layer. Also, the impact of the magnetic parameter (M) shows decrement in the velocity profile because there exists a Lorentz force that suppresses fluid motion. The friction factor and local Nusselt number decrease for higher values of the Casson parameter (β), whereas increment is illustrated for the suction parameter (S).

Significance of non‐Fourier flux on a chemically reactive ternary hybrid nanofluid flow (water + Al2O3 + ZnO + Fe3O4) by a quadratically radiated tended elongating surface

AbstractThis study compares the dynamics of dissipative water–alumina–zinc oxide–iron (II, III) oxide ternary hybrid nanofluid (THNF) and water–alumina–zinc oxide binary hybrid nanofluid flows across an inclined surface when quadratic thermal radiation and chemical reaction are important. This report presents the governing equations for the transportation of both dynamics using the thermo‐physical properties of water (base fluid), alumina nanoparticles, zinc oxide nanoparticles and iron (II, III) oxide nanoparticles. To analyse heat transmission phenomena, the Cattaneo–Christov heat flux model was added into the energy equation. With proper similarity transformations, flow‐driven equations are transformed into nonlinear ordinary differential equations and then solved using the bvp4c solver. Slope of linear regression (SLR) is used to determine the rate at which physical parameters increase or decrease as a result of the influence of relevant factors. It is noticed that, when volume percent of nanoparticles (ϕ1) takes input in the range , skin friction coefficient decreases at a rate of 16.548 (in case of THNF) and 14.2018 (in case of binary hybrid nanofluid) per unit value of volume percent of nanoparticles. It is detected that when radiation parameter increases, Nusselt number decreases. The decrement rates are observed as 2.9451 (in case of THNF) and 1.15337 (in case of binary hybrid nanofluid) when radiation parameter takes input in the range . Furthermore, it is noticed that, when chemical reaction parameter increases, Sherwood number increases. The increment rates are observed as 0.1259 (in case of THNF) and 1.1263 (in case of binary hybrid nanofluid) when chemical reaction parameter takes input in the range . There was also good agreement in a validation study between the current and previous results.

The effect of nozzle geometry on the flow and heat transfer of pulsed impinging jet on the concave surface

The main aim of this paper is to investigate the effect of nozzle geometry on the flow and heat transfer from a pulsed jet into a concave surface. Experiments have been carried out for pulsed circular jet and numerical simulations were done for circular, elliptical, rectangular and square geometries. Numerical solution was performed for the frequency ranges of 25Hz to 100Hz, the jet Reynolds number of 7000, the dimensionless nozzle distance to concave surfaces of 2 and 5. Numerical results show a consistent agreement with experimental results and previous works. Accordingly, the geometry of nozzle directly affects the air entrainment ratio. In addition, with the increase of aspect ratio of the nozzle, average Nusselt number (Nuave) decreases. By pulsating the inlet jet with pulse frequency of 100Hz, the average Nu number for circular/square and elliptical/rectangular jets increases 22% and 15%, respectively. Generally, the pulsation causes a reduction and an increase of the Nuave at low and high frequencies, respectively, compared to that of the steady jet. At low frequencies, the Nuave of circular jet decreases significantly in comparison to that of the square and elliptical jets. However, at high frequencies, circular jet shows higher Nuave compared to other ones. As the distance between the jet and the concave surface increases, the effect of the nozzle shape on Nuave decreases.

Quasi-Linearization Analysis for Entropy Generation in MHD Mixed-Convection Flow of Casson Nanofluid over Nonlinear Stretching Sheet with Arrhenius Activation Energy

Thermal performance of magnetically driven Casson nanofluid over a nonlinear stretching sheet under the influence of entropy, activation energy and convective boundary conditions was analyzed numerically, employing the quasi-linearization method (QLM). The collective behavior of thermophoretic diffusion and Brownian motion along with special effects of viscous dissipation, thermal radiation, heat generation and joule heating are considered in the energy equation for the flow problem. The addition of nanoparticles helps to stabilize the flowing of a nanofluid and maintain the symmetry of the flowing structure. The governing highly nonlinear coupled differential equations of velocity, temperature, concentration and entropy are simulated through an iterative scheme encoded with MATLAB programming language. The geometric model is, therefore, described using a symmetry technique. A comparative analysis of linear and nonlinear stretching in sheets is presented via graphs and tables regarding pertinent dimensionless parameters. It is worth noting that the Nusselt number and Sherwood number decrease at relatively higher rates with growing values of activation energy in the case of nonlinear stretching. Moreover, the entropy generation rate near the stretching surface decreases due to the strong effects of Brownian motion and thermophoretic diffusion while it goes on improving far off the stretching surface.