Prediction of Melt Flow Effects on Dendrite Growth
| Autor: | Xiu Hong Kang, Dianzhong Li, Yun Chen, Xin Bo Qi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Convection
Materials science Characteristic length Mechanical Engineering Flow (psychology) Thermodynamics 02 engineering and technology Péclet number 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Flow velocity Mechanics of Materials 0103 physical sciences symbols General Materials Science Growth rate Diffusion (business) 0210 nano-technology Melt flow index |
| Zdroj: | Materials Science Forum. 850:334-340 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.850.334 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|