Second law analysis of flow in a circular pipe with uniform suction and magnetic field effects

Nagaraju, G; Jangili, S; RamanaMurthy, JV; Beg, OA; Kadir, A

Abstract

The present paper investigates analytically the two-dimensional heat transfer and entropy generation characteristics of axi-symmetric, incompressible viscous fluid flow in a horizontal circular pipe.The flow is subjected to an externally applied uniform suction across the wall in normal direction and a constant radial magnetic field. Constant wall temperature is considered as the thermal boundary condition.The reduced Navier-Stokes equations in a cylindrical coordinate system are solved to obtain the velocity and temperature distributions. The velocity distributions are expressed in terms of stream function and thesolution is obtained using the Homotopy Analysis Method (HAM). Validation with earlier non-magnetic solutions in the literature is incorporated. The effects of various parameters on axial and radial velocities, temperature, axial and radial entropy generation numbers, and axial and radial Bejan numbers and are presented graphically and interpreted at length. Streamlines, isotherms, pressure, entropy generation number and Bejan number contours are also visualized. Increasing magnetic body force parameter shifts the peak of the velocity curve near to the axis where as it accelerates the radial flow. The study is relevant to thermodynamic optimization of magnetic blood flows and electromagnetic industrial flows featuring heat transfer.

Citation

Nagaraju, G., Jangili, S., RamanaMurthy, J., Beg, O., & Kadir, A. (2018). Second law analysis of flow in a circular pipe with uniform suction and magnetic field effects. Journal of Heat Transfer, 141(1), 012004. https://doi.org/10.1115/1.4041796

• Journal Article Type: Article
• Acceptance Date: Sep 19, 2018
• Online Publication Date: Oct 2, 2018
• Publication Date: Oct 2, 2018
• Deposit Date: Sep 20, 2018
• Journal: Journal of Heat Transfer
• Print ISSN: 0022-1481
• Electronic ISSN: 1528-8943
• Publisher: American Society of Mechanical Engineers
• Volume: 141
• Issue: 1
• Pages: 012004
• DOI: https://doi.org/10.1115/1.4041796
• Publisher URL: https://doi.org/10.1115/1.4041796
• Related Public URLs: http://heattransfer.asmedigitalcollection.asme.org/journal.aspx