Implementation and Validation of a Multiphase Multigrain Model of Equiaxed Solidification

3D samples of NH4Cl-H2O solutions were solidified under defined experimental conditions. The occurring melt convection was investigated by Particle Image Velocimetry (PIV). The occurrence of NH4Cl crystals was observed optically and first attempts were made to quantitatively measure its number density, size distribution and sedimentation rate by PIV and Particle Tracking (PT). In order to prove the reproducibility of the results several experimental runs with equal and slightly modified conditions were analyzed.

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A Nucleation Progenitor Function approach to polycrystalline equiaxed solidification modelling with application to a microgravity transparent alloy experiment observed in-situ

Acta Materialia ◽

10.1016/j.actamat.2018.02.012 ◽

2018 ◽

Vol 148 ◽

pp. 289-299

Author(s):

Shaun McFadden ◽

Robin P. Mooney ◽

Laszlo Sturz ◽

Gerhard Zimmermann

Keyword(s):

Function Approach ◽

Equiaxed Solidification

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Combined analytical/numerical modelling of nucleation and growth during equiaxed solidification under the influence of thermal convection

Computational Materials Science ◽

10.1016/j.commatsci.2009.04.016 ◽

2009 ◽

Vol 46 (4) ◽

pp. 777-784 ◽

Cited By ~ 26

Author(s):

Wajira U. Mirihanage ◽

David J. Browne

Keyword(s):

Numerical Modelling ◽

Thermal Convection ◽

Nucleation And Growth ◽

Equiaxed Solidification

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Numerical study of dendrite coherency during equiaxed solidification by the Discrete Element Method

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/33/1/012071 ◽

2012 ◽

Vol 33 ◽

pp. 012071

Author(s):

L Yuan ◽

C O'Sullivan ◽

C M Gourlay

Keyword(s):

Discrete Element Method ◽

Numerical Study ◽

Discrete Element ◽

Equiaxed Solidification ◽

Dendrite Coherency ◽

Element Method

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EXISTENCE OF SOLUTIONS FOR A CONTINUOUS MULTIGRAIN MODEL FOR POLYMERIZATION

Mathematical Models and Methods in Applied Sciences ◽

10.1142/s0218202500000628 ◽

2000 ◽

Vol 10 (08) ◽

pp. 1263-1276

Author(s):

DANIELE ANDREUCCI ◽

ANTONIO FASANO ◽

RICCARDO RICCI

Keyword(s):

Existence And Uniqueness ◽

Existence Of Solutions ◽

The Other ◽

Uniqueness Of Solutions ◽

Small Times ◽

Catalyst Pellets ◽

Multigrain Model ◽

Diffusion Problems

We prove the existence and uniqueness of solutions, for small times, for a mathematical scheme modeling the Ziegler–Natta process of polymerization. The model consists, essentially, of two diffusion problems at two different space scales, one relative to the microscopical catalyst pellets, the other to the macroscopical aggregate of those pellets. The coupling between the two scales is of nonstandard nature.

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