# Modeling and Simulation of Curved Fibers in Dry Spinning Scenarios

## TL;DR

This paper introduces a Cosserat rod model for simulating curved fibers in dry spinning, enabling the analysis of complex fiber-air interactions in industrial scenarios with multiple fibers.

## Contribution

It develops a novel curved fiber model based on Cosserat rods and adapts an existing simulation framework for efficient analysis of industrial dry spinning processes.

## Key findings

- First-time simulation results of multiple curved fibers with two-way airflow coupling
- Demonstrates the model's capability to handle lateral fiber movements
- Enables more realistic industrial dry spinning process simulations

## Abstract

Dry spinning is characterized by the simultaneous production of multiple thin polymeric fibers in airflows and the evaporation of the solvent contained in these fibers. This involves fiber-air interactions as well as radial diffusion effects over the fiber cross-sections. Recent models for fibers in such production processes assume the fiber curves to be strictly uni-axial. But there are industrial setups showing airflow induced lateral movements of the fibers which creates the need for curved fiber models. In this paper we present a special Cosserat rod model that describes curved fibers in such dry spinning processes. Adapting the efficient simulation framework from the uni-axial fiber setting makes the simulation of industrial setups for multiple curved fibers with two-way coupled airflows possible, for which we present results for the first time in literature.