Simulation of liquid-jet overflow in droplet deposition processes

Journal Article · Fri May 28 04:00:00 EDT 1999 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(99)00056-7· OSTI ID:357933

Delplanque, J P; Rangel, R H ^[1]

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1. Univ. of California, Irvine, CA (United States)

Porosity formation in spray deposition processes is investigated. The emphasis is on one possible mechanism of micro-pore formation during droplet spreading and solidification: liquid-jet overflow. To this end, the Navier-Stokes equations are solved numerically using finite differences and the free surface is tracked using the Volume of Fluid (VOF) method. A previously developed multi-directional solidification algorithm is adapted and implemented in the Navier-Stokes solver to perform numerical simulations of liquid-metal droplet impact, spreading, and solidification. The results obtained allow a detailed description of the liquid-jet overflow mechanism and of the resulting solidified disk morphology. The influence of the Weber and Reynolds numbers, the solidification constant, and the contact angle are investigated.

• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States); California Univ., Berkeley, CA (United States)
• OSTI ID: 357933
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 7 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DROPLETS
FINITE DIFFERENCE METHOD
LIQUID METALS
METALS
NAVIER-STOKES EQUATIONS
PORE STRUCTURE
SIMULATION
SOLIDIFICATION
SPRAY COATING