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To ensure the quality of large size castinges, production, of casting models on a laboratory scale is necessary as a preliminary step. The main object of this paper is to find, by performing a similarity analysis, the main criterial similarity groups to be preserved in the prototype and a small dimensioned model. The given similarity approach is based on a comprehensive mathematical analysis of the solidification process, heat transfer mechanisms and temperature differentials through thedoi:10.21608/amme.1986.52053 fatcat:abz5b45nmnarrfnb2fyhd6b6pu