ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Dendrite structure in solidification process has been studied by many researchers for it’swidely existence. In present work, a cellular automata model was proposed according to the basicphysical chemistry concepts, which was helpful for a better understanding of the dendrite crystalgrowth and its physical chemistry mechanism. Two kinds of structures were considered in the model:hexagonal and rectangle. The status of every site was set as 0 and 1 which represent non-solidified andsolidified state. Temperature field was simulated using finite difference method on the same mesh.The states of sites were changed according to the overcooling condition only. The computersimulation results showed that dendrite structure could be obtained under overcooling condition andtemperature field calculation only, the structure of the dendrite was decided by the geometry of themodel. The simulation resulted similar pattern as that obtained by experimental observation. Thepresent model suggested that there exist a very simple basic for the typical complex phenomena,dendrite structure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.109.pdf
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