Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Numerical simulation of three-dimensional free surface flows of Giesekus fluids
Submission Author:
Murilo Tomé , SP
Co-Authors:
Reginaldo Merejolli, Gilcilene Sanchez de Paulo, Jorge Peixinho
Presenter: Murilo Tomé
doi://10.26678/ABCM.ENCIT2016.CIT2016-0080
Abstract
A numerical method for simulating three-dimensional viscoelastic free surface flows governed by the Giesekus constitutive equation has been developed. The momentum equations are solved by the implicit Euler method on a staggered grid while the solution of the Giesekus model is obtained by a second order Runge-Kutta scheme. The free surface is modelled by a front tracking technique based on the Marker-and-Cell method. The numerical method is verified by solving the flow in a tube employing several meshes. Results obtained include the simulation of the jet buckling phenomenon, and the frequency of buckling is calculated for several values of the Reynolds and Weissenberg numbers. Furthermore, the effect of the mobility parameter on the jet buckling phenomenon is investigated.
Keywords
Finite difference, Viscoelastic flow, three-dimensional free surface flow, Giesekus model, Jet buckling
