A Stable Dendritic Growth with Forced Convection: A Test of Theory Using Enthalpy-Based Modeling Methods

The theory of stable dendritic growth within a forced convective flow field is tested against the enthalpy method for a single-component nickel melt. The growth rate of dendritic tips and their tip diameter are plotted as functions of the melt undercooling using the theoretical model (stability crit...

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Bibliographic Details
Published in:JOM (1989) 2020-09, Vol.72 (9), p.3123-3131
Main Authors: Kao, A., Toropova, L. V., Krastins, I., Demange, G., Alexandrov, D. V., Galenko, P. K.
Format: Article
Language:English
Subjects:
Chemical Sciences
Chemistry/Food Science
Computer simulation
Convective flow
Dendritic structure
Earth Sciences
Engineering
Enthalpy
Environment
Forced convection
Heat
Materials Research in Reduced Gravity
Nonlinear Sciences
Phase transitions
Physics
Reynolds number
Simulation
Solids
Stability criteria
Supercooling
Symmetry
Temperature
Theory
Velocity
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Summary:The theory of stable dendritic growth within a forced convective flow field is tested against the enthalpy method for a single-component nickel melt. The growth rate of dendritic tips and their tip diameter are plotted as functions of the melt undercooling using the theoretical model (stability criterion and undercooling balance condition) and computer simulations. The theory and computations are in good agreement for a broad range of fluid velocities. In addition, the dendrite tip diameter decreases, and its tip velocity increases with increasing fluid velocity.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-020-04292-4