Modeling the influence of forming fabric structure on vacuum box dewatering, TAPPI JOURNAL August 2017

ABSTRACT: This investigation used numerical models to describe forming section sheet dewatering at the high vacuum suction boxes. Three different fabric structures were examined with numerical models for single-phase flow of air and for two-phase flow of air and water. This was done to evaluate how forming fabric structure influences sheet dewatering. The numerical models were compared with an experimental study of the same fabrics investigated on a laboratory suction box. The small differences in dewatering rate in the experimental study could be simulated with the models, which confirmed the validity of the models. This implies that these numerical models can be used to describe new fabrics and how they will respond in the papermaking process.

Application:  This article explains how numerical models can be used by manufacturers of paper machine clothing to obtain insights into how forming fabrics influence dewatering processes without investments in laboratory equipment and time-consuming experimental work.

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