Formation of the stream of liquid at the inlet to a spinneret hole
Investigation of the formation of a stream of liquid at the entrance to a spinneret hole has shown that the size of the disturbing zone in the reservoir and the profile of liquid flow velocity at the entrance to the capillary depend on the Reynolds number and the rheological properties of the liquid.
When Re<1, rearrangement of the stream velocity fields in the initial section of the capillary takes place identically for all values of the mean velocity and viscosity of the liquid, and the length of thehydrodynamic stabilization section for lengthwise stream velocity depends basically on the radius of the reservoir. When Re>10, the length of the hydrodynamic stabilization section depends only on the Reynolds number.
The formation and magnitude of the stagnant zones at channel angles depends on the Reynolds number for Newtonian liquids, but for anomalously viscous liquids, it depends, even directly, on the mean velocity of the stream of liquid.
KeywordsPolymer Viscosity Reynolds Number Flow Velocity Velocity Field
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