COBEM99

S25 Métodos Numéricos

Title:

FILLING OF RECTANGULAR MOLDS USING THE VOF METHOD AND A TVD DISCRETIZATION

Summary :

AMONG THE SEVERAL ISSUES THAT HAVE TO BE FACED FOR THE SIMULATION OF THE FILLING STAGE OF A REACTION INJECTION MOLDING (RIM) PROCESS, THE SURFACE-TRACKING PROBLEM IS ONE OF THE MOST CHALLENGING. IN THIS PAPER, THE EQUATIONS OF FLUID MOTION HAVE BEEN DISCRETIZED USING A FINITE-VOLUME METHOD AND THE RESULTING SYSTEM HAS BEEN SOLVED USING THE SIMPLER ALGORITHM. THE SURFACE IS CAPTURED USING THE VOLUME-OF-FLUID METHOD (VOF) WHICH HAS BEEN IMPLEMENTED USING A HIGH ORDER UPWIND-TVD SCHEME THAT CONSERVES THE SHARPNESS OF INTERFACE. THE NUMERICAL CODE HAS BEEN TESTED AGAINST A BENCHMARK SOLUTION FOR THE BACKWARD FACING STEP PROBLEM. RESULTS FOR SQUARE-CAVITY FILLING FOR TWO SYSTEMS (OIL-WATER AND AIR-WATER) HAVE BEEN OBTAINED THAT SHOW THE CAPABILITY OF THE NUMERICAL CODE TO PREDICT FLUID ENTRAPMENT AND INCOMPLETE MOLD FILLING. KEYWORDS: MOLD FILLING, TVD SCHEMES, VOF SCHEMES, COMPUTATIONAL FLUID DYNAMICS (CFD).

Author :

Fontes, C.E. O
Lage , Paulo L.C.
Pinto, J. C.

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