Feasibility Study with Simulation
As part of ongoing collaborative efforts focusing on development and optimisation of production technologies for nonwovens, Fraunhofer ITWM and Siriotek have completed feasibility investigations on bematic® latest airlay design »AioLos«. The study aimed at simulating fibre dynamics inside the airlay to provide insights and data useful for optimising productivity and efficiency of the production process. It consisted of two sequential stage.
1. Analysis of the Airflow Across the Web Forming Cavity
A detailed CFD model was developed by Siriotek engineers which includes moving boundaries to simulate rotation of the main carding drum as well as linear motion of the porous belts designed to promote web formation and transport of nonwoven fabric.
2. Simulation of the Fibre Deposition Process
Results from the CFD analysis were passed to Fraunhofer ITWM for use with their proprietary software FIDYST (FIberDYnamics Simulation Tool). Using material data, density and size for polyester fibres scientists at Fraunhofer ITWM were able to predict motion of the fibres inside the airlay forming vane under the effect of turbulent airflow resulting from the CFD analyses performed at Siriotek, effectively simulating the deposition process on porous moving belts. A detailed technical description of the dynamic model predictive capabilities can be found in the articles in the infobox.