سال انتشار: ۱۳۹۰

محل انتشار: کنفرانس بین المللی فرآورش پلیمرها

تعداد صفحات: ۴

نویسنده(ها):

Narjes Jafari Esfad – Polymer group, Department of Chemical and Petroleum Engineering, Sharif University of TechnologyTehran, Iran
Bahareh Azinfar –
Ahmad Ramazani S.A –

چکیده:

In this research, three dimensional molds filling of polymeric resins has been considered using finite volume scheme. Two-phase model concerning two-phase fluid including Viscoelastic and Newtonian (Air) was applied in mold. Giesekus model was used for a solution of viscoelastic fluid. The viscosity of polymer fluid was assumed 1.2 Pa.s which is about 1000 times greater than water viscosity. The applied pressure difference was considered 8000 Pa. To improve the pressure distribution in the mold, two symmetrical vents on either side of the mold. Obtained results for velocity and pressure distribution are qualitatively in agreement with experimental data presented in literature. Die-swell phenomenon for Viscoelastic fluid was observed at mold entrance. When vent was not embedded, due to increase of pressure in the cavity, an upward force would be applied to the fluid which result in. When the vent is fitted, there is no upward force and the inputted fluid will be gain a greater velocity. Better results were achieved by changing the size and position of vents at different points of mold . Doing several mold filling simulation and investigation the pressure, velocity and alpha profiles. The governing equations of the flow are solved by means of the Open Source code Open FOAM