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Abstract

“When a single cotton hair or fiber is exposed to a moving airstream, it experiences a fractional force induced by the relative movement of the air near the fiber surface. This force, known as aerodynamic drag, was measured for several cottons, each having a different Micronaire reading. Individual fibers were selected for fiber fineness and installed in a specially designed wind tunnel apparatus. Drag-force measurements for crossflow velocities from 12 to 280 cm/sec were recorded. Correlation of the test results show that aerodynamic drag coefficient for all cotton fibers can be expressed by the relation C_d = 10.35/Re^0,825 for the 0.07 to 0.8 Reynolds number range, and C_d = 10.8/Re^0,876 for the Reynolds numbers from 0.8 to 3. Laminar flow drag theories for smooth circular cylinders in crossflow are compared with the data recorded for cotton fibers.

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References

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Aerodynamic Drag of Cotton Fibers in Crossflow

Abstract

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