Modeling Capabilities of Phenomena in Over-Moisture Zone Existing in Porous Medium Using the Simplified Simulation Systems applied in foundry

Abstract

The problem described in the paper concerns the thermo-physical properties of the green mould material to which the cast iron most often is poured (about 50% of production). The study described in the paper includes the iron plate casting experiments poured in green bentonite-sand mould. The temperature fields of casting and in different zones of the mould were recorded. The determining of the thermo-physical properties of mould sand containing the over-moisture zone by using simulation tests (inverse problem) was the goal of this study. An originality of the related research is an attempt to take into account the effects of the global thermal phenomena occurring in the quartz sand bonded by bentonite-water binder, applying the apparent thermal coefficients. The majority of foundry simulation systems are not capable of modeling the phase transformation of water into vapor, follow by vapor transport and its condensation in the porous media (mould). In these cases, the application of apparent coefficients is an effective way.