ISBN 9783843940641

978-3-8439-4064-1, Reihe Ingenieurwissenschaften

Matthias Samuel Niethammer
A Finite Volume Framework for Viscoelastic Flows at High Weissenberg Number

177 Seiten, Dissertation Technische Universität Darmstadt (2019), Softcover, A5

Zusammenfassung / Abstract

The present work deals with the numerical study of viscoelastic flows. The fundamental objectives are: (i) the development of a generic numerical framework for the transient simulation of viscoelastic flows in complex geometries at high Weissenberg number based on a finite volume method; (ii) the predictive numerical analysis of the flow of polymer solutions and concentrated polymer melts in contraction geometries for the challenging case of high Weissenberg numbers; (iii) the extension of the Volume-of-Fluid (VoF) method for direct numerical simulations (DNS) of two-phase flows with at least one viscoelastic phase; (iv) direct numerical simulations of a rising bubble in a viscoelastic fluid in order to predict the jump discontinuity of the steady rise velocity when the bubble exceeds a critical volume.