Simplified Modeling of Moisture Transfer in Porous Media under Condition of High Temperature Heat Shock

Abstract:

High-temperature heat shock is caused by pouring a liquid alloy (cast iron in this case) into cavity of a wet sand mould. In the mould material, thermal-chemical-physical phenomena of very high intensity occur. These phenomena are important in metal alloys casting only insofar as they influence quality of a casting (dynamics od solidification and casting’s structure, gas and shrinkage defects). This quality can be forecasted using simulation codes dedicated for the foundry branch. The most important phenomena are subject of hard and/or soft modeling. Heat transfer from a casting to a mould is related to simultaneous mass transfer. This coupling of phenomena is differently interpreted by creators of simulation codes and introduced to algorithms solved numerically. The paper presents an example of simplified modeling of phenomena of thermal influence of a wet mould sand on solidification of a test cast iron casting, with use of selected foundry simulation codes.

• Periodical: Diffusion Foundations (Volume 9)
• Pages: 128-140
• DOI: https://doi.org/10.4028/www.scientific.net/DF.9.128
• Online since: October 2016
• Authors: Zenon Ignaszak*
• Keywords: Cast Iron, Condensation, Evaporation, Quartz Sand-Clay Mixture, Simulation Codes, Wet (Green) Foundry Moulds

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