Fiber on its Orientation in a Shear Flow at Finite Reynolds Numbers, TAPPICon24

Orientation of flexible fibers in the forming section in a paper machine is important for paper quality.  How flexibility of fibers affect their orientation in the cross machine direction is still unclear.  In present work, a lattice-Boltzmannlattice- spring methods to disapplied to simulate the fiber orientation in in the cross flow direction.  We found that at a given Reynolds number, when fiber rigidity is small enough direction, and rotates around the voricity direction like a screwdriver, called helimotion.  The hilimotion causes the fiber to be oriented in the cross flow direction.

The helix motion causes the fiber to be oriented in the cross flow direction.  In other words, the fiber long body turns to the crossmachine direction if the fiber is flexible enough.  As the fiber rigidity increases, the fiber processes to snake-springy, and rigid motion in this sequence.

At given ratio of fluid for ceto fiber rigidity, the Reynolds number may alter fiber rotation. As the Reynolds number increases, the fiber may take helix, snake,springy, and rigid modes in sequence.  All phenomenons above occur at a particle Reynolds number less than a critical value where the fiber stops rotating.

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.