title: Steady flow and heat transfer analysis of Phan-Thein-Tanner fluid in double-layer optical fiber coating analysis with Slip Conditions.
abstract: Modern optical fibers require double-layer coating on the glass fiber to provide protection from signal attenuation and mechanical damage. The most important plastic resins used in wires and optical fibers are plastic polyvinyl chloride (PVC) and low-high density polyethylene (LDPE/HDPE), nylon and Polysulfone. In this paper, double-layer optical fiber coating is performed using melt polymer satisfying PTT fluid model in a pressure type die using wet-on-wet coating process. The assumption of fully developed flow of Phan-Thien-Tanner (PTT) fluid model, two-layer liquid flows of an immiscible fluid is modeled in an annular die, where the fiber is dragged at a higher speed. The equations characterizing the flow and heat transfer phenomena are solved exactly and the effects of emerging parameters (Deborah and slip parameters, characteristic velocity, radii ratio and Brinkman numbers on the axial velocity, flow rate, thickness of coated fiber optics, and temperature distribution) are reported in graphs. It is shown that an increase in the non-Newtonian parameters increase the velocity in the absence or presence of slip parameters which coincides with related work. The comparison is done with experimental work by taking λ → 0 (non-Newtonian parameter).
authors.affiliation: Department of Mathematics, Abdul Wali Khan University, Mardan, KPK, Pakistan.|Department of Computer Science and IT, Sarhad University of Science and IT, KPK, Pakistan.
authors.forename: Zeeshan
authors.initials: Z
authors.lastname: Khan
authors.affiliation: Department of Mathematics, University of Engineering and Technology, Peshawar, KPK, Pakistan.
authors.forename: Rehan Ali
authors.initials: RA
authors.lastname: Shah
authors.affiliation: Department of Mathematics, Abdul Wali Khan University, Mardan, KPK, Pakistan.
authors.forename: Saeed
authors.initials: S
authors.lastname: Islam
authors.affiliation: Department of Computer Science and IT, Sarhad University of Science and IT, KPK, Pakistan.
authors.forename: Bilal
authors.initials: B
authors.lastname: Jan
authors.affiliation: Department of Computer Science and IT, Sarhad University of Science and IT, KPK, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Imran
authors.affiliation: Department of Physics, Abdul Wali Khan University, Mardan, KPK, Pakistan.
authors.forename: Farisa
authors.initials: F
authors.lastname: Tahir