الدراسات النظرية والعددية لهذه الورقة تركز على التنبؤات النظرية والعددية لتدفق الموت
السوائل اللزجة و viscoelastoplastic
الملخص الانجليزي
This paper focuses on the theoretical and numerical predictions of die-swell flow for
viscoelastic and viscoelastoplastic fluids. The theoretical results on die swell have been
obtained by Tanner for a wide class of constitutive equations, including Phan-Thien Tanner
(PTT), pom-pom, and general network type models. These results are compared with
numerical solutions across swelling ratio, pressure drop, state of stress, and dissipation-rate
for two fluid models, exponential Phan-Thien Tanner (EPTT) and Papanastasiou-
Exponential Phan-Thien Tanner (Pap-EPTT). Numerically, the momentum and continuity
flow equations are solved by a semi-implicit time-stepping Taylor-Galerkin/pressure-
correction finite element method, whilst the constitutive equation is dealt with by a cell-vertex
finite volume (cv/fv) algorithm.
تاريخ النشر
01/08/2016
الناشر
Korea-Australia Rheology Journal
رقم المجلد
28
رقم العدد
الكلمات المفتاحية
hybrid finite element/volume viscoplastic viscoelastoplastic die-swell exponential Phan-Thien Tanner model Papanastasiou model