Abstract
We study the steady, two-dimensional boundary layer flow and heat transport caused by a stretching cylinder immersed in an incompressible, viscous nanoliquid. The thermal analysis has been done for prescribed surface temperature as well as for prescribed heat flux. The governing partial differential equations in cylindrical form for momentum and heat transfer are reduced to non-linear ordinary differential equations by using similarity transformation. The differential transform method is used to solve these non-linear ordinary differential equations, under appropriate boundary conditions, in the form of power series. The inverse Domb–Sykes plots between number of terms against ratio of consecutive coefficients of the power series are sketched to determine the minimum number of terms required in the series to ensure convergence. A rational approximation in the form of Pad\(\acute{e}\) approximant is then applied to increase the convergence of the power series. Results for skin friction coefficient and surface heat transfer have been presented as a property of nanoparticle volume fraction, curvature parameter and Prandtl number. Dilute concentration \((0<\phi \le 0.2)\) of copper-nanoparticle is considered. Comparison of numerical results are made with previously published works in some limiting cases. The problem is shown to reduce to the stretching sheet case in the absence of transverse curvature.
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Abbreviations
- \(C_p\) :
-
Specific heat at constant pressure
- \(C_f\) :
-
Skin friction coefficient
- \(Nu_x\) :
-
Local Nusselt number
- Pr :
-
Prandtl number
- R :
-
Radius of the cylinder
- \(Re_x\) :
-
Local Reynolds number
- t :
-
Dimensional local temperature of the nanoliquid
- T :
-
Dimensionless local temperature of the nanoliquid
- u, v :
-
Axial and radial velocity components
- x, r :
-
Axial and radial coordinates
- \(\alpha _{nl}\) :
-
Thermal diffusivity of nanoliquid
- \(\eta \) :
-
Similarity variable
- \(\gamma \) :
-
Transverse curvature parameter
- \(\kappa \) :
-
Temperature-dependent-thermal conductivity
- \(\phi \) :
-
Volume fraction of solid nanoparticle
- \(\psi \) :
-
Stream function
- \(\rho \) :
-
Density
- \(\tau _w\) :
-
Surface shear stress
- \(\theta \) :
-
Dimensionless temperature
- \(\vartheta _{nl}\) :
-
Kinematic viscosity of nanoliquid
- \(\textit{nl}\) :
-
Nanoliquid
- \(\textit{bl}\) :
-
Baseliquid
- \(\textit{p}\) :
-
Solid nanoparticle
- \(*\) :
-
Dimensional quantities
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Acknowledgments
Research is supported by the Department of Science and Technology (Government of India), New Delhi, India under the project SR/S4/MS: 409 / 06. The project is being implemented at the Centre for Mathematical Sciences, Banasthali University, Rajasthan, India. The work was initiated during the visit of one of the authors (PGS) to Banasthali University.
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Sinha, D., Jain, P., Siddheshwar, P.G. et al. Boundary Layer Flow and Thermal Analysis of a Cu-Nanoliquid Past a Stretching Cylinder. Int. J. Appl. Comput. Math 3, 2559–2572 (2017). https://doi.org/10.1007/s40819-016-0255-7
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DOI: https://doi.org/10.1007/s40819-016-0255-7