Thermal Behavior of Optical Fibers during the Cooling Stage of the Drawing Process

Singh, M (2011) Thermal Behavior of Optical Fibers during the Cooling Stage of the Drawing Process. Masters thesis, Indian Institute of Technology.

Preview

Text
ME09G009.pdf - Submitted Version
Download (16MB)

Abstract

Thermal behavior of optical fibers during the cooling stage of the drawing process has been studied numerically. An optical fiber during the cooling stage of the drawing process can be modeled as an infinite cylinder moving in still air at a constant speed. Two-dimensional unsteady energy equation is solved using fourth order Rungue-Kutta method (RK-4) for time integration and second order finite difference schemes for spatial derivatives. Two-dimensional steady boundary layer equations are solved to estimate the value of convective heat transfer coefficient at the surface of the fiber using implicit finite difference method. The velocity and temperature contours are plotted with different values of Reynolds number. The value of convective heat transfer coefficient is matching very well with the results available from the literature. Results are reported with different speed and size of the optical fiber. Reported results show that the cooling rate of the optical fiber is increases with the increase of drawing velocity at a fixed diameter. The cooling rate of the optical fiber is increases with the increase of diameter at a constant drawing velocity. The cooling rate of the optical fiber decreases with the increase of thermal conductivity for a fixed size and drawing speed of the fiber. The present results are matching very well with results available from the literature.

[error in script]

IITH Creators: