The influence of hydrodynamic flow on microstructure evolution during solidification

Numerical simulation of solidification and crystal growth has attracted industrial attention as a powerful engineering tool for processes and alloy optimization. In this work we present a detailed study of the influence of flow on the microstructure evolution during solidification. First, we use a classical sharp interface approach combined with an accurate fluid flow solver to simulate dendritic growth under the influence of an imposed flow. Secondly, we include convection effects into an existing quantitative phase-field model [Phys. Rev. E, 70 (2004) 061604] that is meant to simulate dendritic growth of a binary alloy. We apply it to investigate the solidification of a Fe-Mn alloy under external flows conditions. In addition, we present an extension of the quantitative phase-field model of two-phase growth [Phys. Rev. E, (2005) 72 011602] that includes natural and forced convection effects in the melt phase. We use this extension to investigate directional solidification of eutectic lamellae under the influence of convection as well as heterogeneous nucleation and microstructure formation of peritectic growth in the presence of convection.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2008

Author dc:creator

• Siquieri, Ricardo

Contributors dc:contributor

• Emmerich, Heike

• info:eu-repo/classification/ddc/620
• Modellierung
• Erstarrung
• Gerichtete Erstarrung
• Konvektion
• Phasenfeldmodell
• Mikrostruktur
• Ingenieurwissenschaften
• Sharp-Interface-Modellierung
• eutektisches Wachstum
• peritektisches Wachstum
• Sharp-interface model
• phase-field model
• dendritc growth
• eutectic growth
• peritectic growth
• convection

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

eng

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-112814%22

OAI record oai:identifier

https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A50263