Numerical simulation of double-layer optical fiber coating using Oldroyd 8-constant fluid as a coating material

作者：Khan Zeeshan; Rasheed Haroon Ur^*; Shah Qayyum; Abbas Tariq; Ullah Murad

来源：Optical Engineering, 2018, 57(7): 076104.

DOI：10.1117/1.OE.57.7.076104

• double-layer coating
• wet-on-wet coating process
• Oldroyd 8-constant fluid
• optimal homotopy asymptotic method and shooting technique

Polymer flow during wire coating in a pressure type coating die has been simulated under non-isothermal conditions. The flow is dependent on the wire velocity, geometry of the die, and the viscosity of the polymer. The constitutive equation of an Oldroyd 8-constant fluid is used to characterize the rheology of the polymer melt. The equation describing the flow of polymer melt inside the die is solved (i) analytically by applying optimal homotopy asymptotic method and (ii) numerically by shooting method with Runge-Kutta-Fehlberg algorithm. The convergence of the series solution is established. The effect of physical characteristics of the problem has been discussed in detail through graphs by assigning numerical values for several parameters of interest. At the end, this study is also compared with the published work as a particular case and good agreement iS found.

• 出版日期2018-7