A model for fluid flow in dies

✍ Scribed by E.P. Vrahopoulou

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 747 KB
• Volume: 46
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(91)80022-q

✦ Synopsis

A new method is presented for modeling fluid flow inside dies under conditions of Stokes Bow. The dies of interest consist of a distribution channel and a narrow slit. Flow in these regions is treated simultaneously and the two-dimensional flow field in the slit is modeled as that in a HeleeShaw cell. The dependence of flow uniformity on the die geometry is demonstrated explicitly, and the die dimensions and the shape of the distribution channel arecorrelated with the exit velocity profiles. It is shown that optimum die design can be achieved by allowing for sufficient length of the slit region, and by selecting the proper size and orientation of the distribution channel. Comparisons of the model predictions with the simplified analysis of unidirectional flow in the slit indicate the limited applicability of the latter approach. Experimental data are also presented which validate the accuracy of the proposed model.