Phase field modelling of rayleigh instabilities in the solid-state
| Autor: | Abhik Choudhury, T.A. Abinandanan, Chaitanya Joshi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Surface diffusion Materials science Polymers and Plastics Field (physics) Metals and Alloys Phase (waves) Materials Engineering (formerly Metallurgy) Nanotechnology 02 engineering and technology Radius Mechanics 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials Quantitative Biology::Subcellular Processes symbols.namesake 0103 physical sciences Ceramics and Composites symbols Pinch Cylinder Rayleigh–Taylor instability Rayleigh scattering 0210 nano-technology |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| Popis: | We have used a phase field model to study Rayleigh instability driven evolution of a cylindrical pore. The key feature in the model is its ability to incorporate surface diffusion as the mechanism for mass transport. We first benchmark our model with analytical results for growth rates of sinusoidal perturbations imposed on the surface of a cylindrical pore of radius R at early times. We then use the model to predict breakdown of infinite cylindrical pores; the principal finding from our analysis is that time to failure scales as R-4. We have also studied the break-up of closed and open cylindrical pores of finite length; a series of about five spherical pores get pinched off sequentially at the cylinder ends before the middle parts of the pore break up. Compared to the first closure event in an infinite pore, the first pinch off event in closed and open pores is faster by about 4 times and 25 times, respectively. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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