To read this content please select one of the options below:

Hydro-thermo-fluidic aspects of Oldroyd B fluid with hybrid nanostructure subject to low and moderate Prandtl numbers

Rajib Gope (Department of Mathematics, Amity University Kolkata, Kolkata, India)
Manoj Kumar Nayak (Department of Mechanical Engineering, Siksha O Anusandhan University, Bhubaneswar, India)
Sachin Shaw (Department of Mathematics and Statistical Sciences, Botswana International University of Science and Technology, Palapye, Botswana)
Sabyasachi Mondal (Department of Mathematics, Amity University Kolkata, Kolkata, India)

Multidiscipline Modeling in Materials and Structures

ISSN: 1573-6105

Article publication date: 26 January 2023

Issue publication date: 24 February 2023

66

Abstract

Purpose

The major goal of this article is to investigate flow and thermal aspects of Oldroyd B with hybrid nanostructure subject to a radially stretched surface under the influence of low and moderate Prandtl numbers.

Design/methodology/approach

The non-dimensional governing equations are solved considering BVP4C in MATLAB as instrumental.

Findings

Entropy generation effect is analyzed. Radial velocity and entropy generation exhibit opposite effect in response to amplified relaxation and retardation time parameters in case of both low and moderate Prandtl numbers. Augmented relaxation and retardation time parameters controls heat transfer rate.The results show that increasing the aspect ratio increases both the average Nusselt and entropy generation numbers for each value of the Prandtl number, while increasing the prandtl number decreases both. There is also a minimum value for the entropy generation number at a given relaxation and retardation parameter.

Research limitations/implications

Assume that the Oldroyd B fluid is dispersed with hybrid nanostructure in order to ameliorate thermal conductivity of Oldroyd B fluid so as to make it as best coolant.

Practical implications

The low range of Prandtl number comprising particles of air, gas, etc. and moderate range of Prandtl number comprising particles of honey, thin motor oil, or any non-Newtonian liquid. The hybrid nanofluid is radiative in nature. Also, the effects of significant physical parameters on entropy generation are highlighted. The entropy generation number intensifies due to the rise in temperature difference parameter at low/moderate Prandtl number effectively. Entropy minimization can lead to the amelioration of available energy thereby enhances the efficiency of several thermal systems.

Originality/value

This article's primary goal is to investigate the flow and thermal aspects of Oldroyd B with a hybrid nanostructure subject to a radially stretched surface under the influence of low and moderate Prandtl numbers.

Keywords

Acknowledgements

The authors are thankful to Amity University, Kolkata, India, for the necessary support to complete this work.

Funding: There is no funding for this research work.

Conflict of Interest: The authors do not have any conflict of interest regarding the publication of this paper in this journal.

Citation

Gope, R., Nayak, M.K., Shaw, S. and Mondal, S. (2023), "Hydro-thermo-fluidic aspects of Oldroyd B fluid with hybrid nanostructure subject to low and moderate Prandtl numbers", Multidiscipline Modeling in Materials and Structures, Vol. 19 No. 2, pp. 292-310. https://doi.org/10.1108/MMMS-09-2022-0200

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

Related articles