Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
POLYMER MELT FLOW IN ASYMMETRIC SUDDEN EXPANSIONS: A NUMERICAL STUDY
Submission Author:
Felipe Oliveira Basso , PR , Brazil
Co-Authors:
Paulo Zdanski, Diego Beppler, Miguel Vaz Jr.
Presenter: Felipe Oliveira Basso
doi://10.26678/ABCM.ENCIT2016.CIT2016-0061
Abstract
The present work deals with numerical simulation of three-dimensional, laminar, incompressible and non-isothermal polymer melt flow in sudden expansions. The main goal of the paper is to study the general features of the flow topology, assessing the effects of channel aspect ratio on pressure drop and Nusselt number. The mathematical model comprises the mass, momentum and energy conservative laws within a framework of generalized Newtonian formulation. The non-Newtonian flow behaviour is modelled by the Cross constitutive relation. The numerical simulation is performed by the commercial software ANSYS FLUENT, that was based in a Finite Volume formulation. The pressure-velocity coupling is treated by segregated solution. The results obtained are divided in two parts: i) firstly, the numerical verification indicates that the FLUENT solution presents good agreement with other literature works; (ii) afterwards, the parametric study demonstrates that three-dimensional flow topology as well as pressure drop and Nusselt number are very sensitive to the channel aspect ratio.
Keywords
Non-Newtonian flow, Polymer melt flow, Three-dimensional sudden expansion, Numerical analysis
