تبحث هذه الدراسة في الحل العددي للتدفقات اللزجة و اللزجة للأنبوب
طلاء قذف القوالب باستخدام تقنية (fe/fv)
الملخص الانجليزي
This study investigates the numerical solution of viscous and viscoelastic flows for tube-
tooling die-extrusion coating using a hybrid nite element/nite volume discretisation (fe/fv).
Such a complex polymer melt extrusion-draw-coating flow displays a dynamic contact line,
slip, die-swell and two separate free-surfaces, presenting an inner and outer conduit surface
to the melt-coating. The practical interest lies in determining efficient windows for process
control over variation in material properties, stressing levels generated and vacuum
pressure levels imposed. The impact of shear-thinning is also considered. Extensive
reference is made throughout to viscous inelastic counterpart solutions. Attention is paid to
the influence and variation in relevant parameters of Weissenberg number (We), solvent-
fraction (β) and second normal difference (N 2)(ξ parameter for EPTT).