A comparative study between linear and exponential stretching sheet with double stratification of a rotating Maxwell nanofluid flow

PurposeThe focus of the paper is only on the contributions toward the use of entropy generation of non-Newtonian Casson fluid over an exponential stretching sheet. The purpose of this paper is to investigate the entropy generation and homogeneous–heterogeneous reaction. Velocity and thermal slips are considered instead of no-slip conditions at the boundary.Design/methodology/approachBasic equations in form of partial differential equations are converted into a system of ordinary differential equations and then solved using the spectral quasi-linearization method (SQLM).FindingsThe validity of the model is established using error analysis. Variation of the velocity, temperature, concentration profiles and entropy generation against some of the governing parameters are presented graphically. It is to be noted that the increase in entropy generation due to increase in heterogeneous reaction parameter is due to the increase in heat transfer irreversibility. It is further noted that the Bejan number decreases with Brinkman number because increase in Brinkman number reduces the total entropy generation.Originality/valueThis paper acquires realistic numerical explanations for rapidly convergent temperature and concentration profiles using the SQLM. Convergence of the numerical solutions was monitored using the residual error of the PDEs. The resulting equations are then integrated using the SQLM. The influence of emergent flow, heat and mass transfer parameters effects are shown graphically.

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Effects of partial slip on boundary layer flow past a permeable exponential stretching sheet in presence of thermal radiation

Heat and Mass Transfer ◽

10.1007/s00231-012-1024-8 ◽

2012 ◽

Vol 48 (10) ◽

pp. 1773-1781 ◽

Cited By ~ 46

Author(s):

Swati Mukhopadhyay ◽

Rama Subba Reddy Gorla

Keyword(s):

Boundary Layer ◽

Thermal Radiation ◽

Boundary Layer Flow ◽

Stretching Sheet ◽

Partial Slip ◽

Flow Past ◽

Exponential Stretching ◽

Exponential Stretching Sheet ◽

Layer Flow

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Influence of chemically radiative nanoparticles on flow of Maxwell electrically conducting fluid over a convectively heated exponential stretching sheet

World Journal of Engineering ◽

10.1108/wje-04-2019-0100 ◽

2019 ◽

Vol 16 (6) ◽

pp. 791-805

Author(s):

Atul Kumar Ray ◽

Vasu B.

Keyword(s):

Stretching Sheet ◽

Volume Fraction ◽

Maxwell Fluid ◽

Nanoparticle Volume Fraction ◽

Analysis Method ◽

Content Type ◽

Electrically Conducting ◽

Exponential Stretching ◽

Homotopy Analysis ◽

Exponential Stretching Sheet

Purpose This paper aims to examine the influence of radiative nanoparticles on incompressible electrically conducting upper convected Maxwell fluid (rate type fluid) flow over a convectively heated exponential stretching sheet with suction/injection in the presence of heat source taking chemical reaction into account. Also, a comparison of the flow behavior of Newtonian and Maxwell fluid containing nanoparticles under the effect of different thermophysical parameters is elaborated. Velocity, temperature and nanoparticle volume fractions are assumed to have exponential distribution at boundary. Buongiorno model is considered for nanofluid transport. Design/methodology/approach The equations, which govern the flow, are reduced to ordinary differential equations using suitable transformation. The transformed equations are solved using a robust homotopy analysis method. The convergence of the homotopy series solution is explicitly discussed. The present results are compared with the results reported in the literature and are found to be in good agreement. Findings It is observed from the present study that larger relaxation time leads to slower recovery, which results in a decrease in velocity, whereas temperature and nanoparticle volume fraction is increased. Maxwell nanofluid has lower velocity with higher temperature and nanoparticle volume fraction when compared with Newtonian counterpart. Also, the presence of magnetic field leads to decrease the velocity of the nanofluid and enhances the skin coefficient friction. The existence of thermal radiation and heat source enhance the temperature. Further, the presence of chemical reaction leads to decrease in nanoparticle volume fraction. Higher value of Deborah number results in lower the rate of heat and mass transfer. Originality/value The novelty of present work lies in understanding the impact of fluid elasticity and radiative nanoparticles on the flow over convectively heated exponentially boundary surface in the presence of a magnetic field using homotopy analysis method. The current results may help in designing electronic and industrial applicants. The present outputs have not been considered elsewhere.

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