MULTIDIRECTIONAL SOLIDIFICATION MODEL FOR THE DESCRIPTION OF MICROPORE FORMATION IN SPRAY DEPOSITION PROCESSES
- 1 July 1996
- journal article
- research article
- Published by Taylor & Francis in Numerical Heat Transfer, Part A: Applications
- Vol. 30 (1) , 1-18
- https://doi.org/10.1080/10407789608913825
Abstract
This article describes a numerical investigation of micropore formation in solidifying molten metal droplets impinging on a colder substrate. The velocity field inside the spreading liquid droplet is computed as a solution of the incompressible Navier-Stokes equations, and a volume-of-fluid function is defined in order to track the location of the free surface. A multidirectional solidification model is implemented to simulate the formation of possible pores, cavities, and/or troughs. This tracking algorithm allows for complex interface morphology representation as well as interface merging simulation. In the test case considered (high-velocity impact of a single droplet), simulations predict the formation of an annular trough on the surface of the solidified splat. This feature may be a precursor of pore or cavity formation in multiple-droplet cases.Keywords
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