Behavior of fluid flow and heat transfer induced by a stretching surface in the presence of polymers. (1st June 2021)

• Record Type: Journal Article
• Authors: Athar, Maria; Ahmad, Adeel
• Is Part Of: Physica scripta. Volume 96:Number 9(2021)
• Publication Date: 2021-06-01
• Subjects: polymers -- stretching surface -- relaxation time -- boundary layers -- skin friction -- heat transfer; Physics -- Periodicals; 530.05
• DOI: 10.1088/1402-4896/ac0376
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: This article discusses the effects of polymers on flow of a viscous incompressible fluid induced by a heated, permeable, stretching surface. Our main interest is to investigate the response of skin friction and heat transport in the presence of polymers. In consequence of polymer stretching, an additional stress arises in the equation of motion for the velocity field. The simplest Oldroyd-B model of polymers is used to study polymer presence. A set of equations is derived accordingly and solved numerically by using an iterative scheme. We find that the zero-shear viscosity reduces near the surface because of the polymers' interaction with the velocity gradients in the boundary layer, but then goes back to zero-shear viscosity on moving away from the plate. Reduction in skin friction and heat flux is also noticed as a result of polymer addition in the base fluid. Dependence of this reduction on different parameters is also investigated.