## Effects of Inertia and Process Parameters on Isothermal High Speed Two-Layer Filament Jet Flow

**Authors:** Md. Abdul Wakil, Z. U. Ahmed

This paper investigates the influences of inertia and process parameters on two-layer fiber
spinning process for incompressible, isothermal and Newtonian filament jet flow. The present study
focuses on the steady flow considering inertia, gravity and non-uniform velocity of each layer across
the fiber. The governing equations are solved numerically as nonlinear two-point boundary value
problem given the analytical solution is practically impossible. The effects of inertia and initial process
conditions (draw ratio, initial velocity ratio and die exit radius ratio) are discussed. The velocity
increases monotonically with the axial position in each layer due to inertia effect, at a rate that is
relatively slower (faster) near the spinneret (take-up point) as Re increases. In contrast, the radii
decrease monotonically with the axial position in each layer.

**Comments:** 9 Pages.

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### Submission history

[v1] 2012-08-19 10:51:44

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