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HomeMaterials Science ForumMaterials Science Forum Vol. 850Prediction of Melt Flow Effects on Dendrite Growth

Prediction of Melt Flow Effects on Dendrite Growth

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Abstract:

The effects of melt flow on dendrite growth during solidification are studied by the quantitative phase field model coupling the Navier-Stokes equations. Through analyzing the relationship between flow velocity and dendrite growth rate in simulations, a flow Péclet number involving with characteristic flow velocity, characteristic length of the zone affected by flow and thermal (solute) diffusion coefficient, is suggested for dendrite growth under convections. The growth rate increment due to flow follows a power-law relationship with the Péclet number. As the Péclet number is much higher than one, the influence of convection on dendrite growth is apparent, whereas as it is below one, the flow effects can be neglected.

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Periodical:

Materials Science Forum (Volume 850)

Pages:

334-340

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.850.334

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Online since:

March 2016

Authors:

Yun Chen*, Xin Bo Qi, Dian Zhong Li, Xiu Hong Kang

Keywords:

Dendrite Growth, Flow Péclet Number, Melt Flow, Phase Field

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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