The viscosity is the parameter representing the friction of the flow. The fluid lines adjacent different movement speeds, in addition to the collisions between particles also have a momentum exchange between them.
For very small viscosity of water should the water near the rotary element will be thrown under centrifugal force.
for plastic materials huge viscosity, plastic migrate to the center axis and move up on the spindle.
the viscosity of the resin depends on the temperature, flow unlike yoc61 together in dragon mold and channels, the flow is turbulent flow in the mold.
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