Thermally developed unsteady viscoelastic micropolar nanofluid with modified heat/mass fluxes: A generalized model

Sami Ullah Khan, Sabir Ali Shehzad, A. Rauf and Z. Abbas

Physica A: Statistical Mechanics and its Applications, 2020, vol. 550, issue C

Abstract: The main concern of current investigation is to develop an unsteady mathematical model for viscoelastic micropolar nanofluid flow caused by periodically accelerating surface. The generalized heat and mass flux relations are utilized in the energy equation. Further, the energy equation is altered by employing thermal radiation features derived from famous theory of Rosseland’s approximation. The Prandtl number and radiation constants are premeditated as new parameter called here as effective Prandtl number. The solution of formulated dimensionless equations has been stimulated with the help of homotopy analysis method. A theoretical based observation for each engineering parameters is carried out with detailed physical properties. The involved physical quantities namely effective Nusselt number and Sherwood number are evaluated numerically. Numerous contributions have been advised for flow of micropolar fluid but no attempt has been made regarding unsteady viscoelastic micropolar nanofluid with Cattaneo–Christov model which may eventually reduced to the traditionally viscous, viscoelastic and micropolar fluid results simultaneously as limiting cases.

Keywords: Viscoelastic micropolar nanofluid; Cattaneo–Christov theory; Thermal radiation; Oscillatory stretching sheet (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:550:y:2020:i:c:s0378437119322071

DOI: 10.1016/j.physa.2019.123986

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