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  A lattice Boltzmann study on dendritic growth of a binary alloy in the presence of melt convection

Sun, D., Wang, Y., Yu, H., & Han, Q. (2018). A lattice Boltzmann study on dendritic growth of a binary alloy in the presence of melt convection. International Journal of Heat and Mass Transfer, 123, 213-226. doi:10.1016/j.ijheatmasstransfer.2018.02.053.

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Sun, D., Autor
Wang, Yong1, Autor           
Yu, H., Autor
Han, Q., Autor
Affiliations:
1Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063287              

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Schlagwörter: Lattice Boltzmann; Dendritic growth; Numerical simulation; Melt convection; Solidification entropy
 Zusammenfassung: A multi-relaxation-time (MRT) lattice Boltzmann (LB) based model is utilized to simulate the dendritic growth with melt convection in solidification of alloys. It models melt convection by the MRT-LB equation and solute transport by a conservation equation with a pseudo-potential function. The D2Q9 lattice vectors are proposed to describe interface advancement in the liquid-solid transition. Effects of undercoolings, interface curvature and preferred growth orientation are incorporated into the model implicitly. After model validation, dendritic growth under several conditions of pure diffusion and melt convection was numerically investigated, and the solidification entropies were proposed to quantitatively characterize the solidification system. The result shows that the growth behavior, microstructure formation and solute segregation are significantly influenced by melt convection. The solidification entropies reflecting complexity of the solidification system are useful to characterize dendritic growth and solute segregation. This work offers a potential solution for studies of microstructure evolution in solidification of alloys.

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Sprache(n): eng - English
 Datum: 2018-03-202018-08
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
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Titel: International Journal of Heat and Mass Transfer
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 123 Artikelnummer: - Start- / Endseite: 213 - 226 Identifikator: -