Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Journal of Enhanced Heat Transfer
Facteur d'impact: 1.406 Facteur d'impact sur 5 ans: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074

Volumes:
Volume 27, 2020 Volume 26, 2019 Volume 25, 2018 Volume 24, 2017 Volume 23, 2016 Volume 22, 2015 Volume 21, 2014 Volume 20, 2013 Volume 19, 2012 Volume 18, 2011 Volume 17, 2010 Volume 16, 2009 Volume 15, 2008 Volume 14, 2007 Volume 13, 2006 Volume 12, 2005 Volume 11, 2004 Volume 10, 2003 Volume 9, 2002 Volume 8, 2001 Volume 7, 2000 Volume 6, 1999 Volume 5, 1998 Volume 4, 1997 Volume 3, 1996 Volume 2, 1995 Volume 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2018016117
pages 413-430

NUMERICAL SIMULATION OF PILEUP PROCESS IN METAL MICRODROPLET DEPOSITION MANUFACTURE

Jun Du
College of Mechanical and Power Engineering, Three Gorges University, Yichang, Hubei, China; State Key Laboratory of Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Zhengying Wei
College of Mechanical and Power Engineering, Three Gorges University, Yichang, Hubei, China; State Key Laboratory of Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Haihua Wu
College of Mechanical and Power Engineering, Three Gorges University, Yichang, Hubei, China
Guangxi Zhao
State Key Laboratory of Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Xin Wang
State Key Laboratory of Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China

RÉSUMÉ

The present work is an original systematic numerical investigation of the transient transport phenomena occurring during the pileup of molten metal droplets. A numerical model of flow and heat transfer for microdroplet deposition forming was established on 7075 aluminum alloy by adopting the semi-implicit pressure-linked equation algorithm (SIMPLE) and the volume-of-fluid (VOF) method with the piecewise linear interface construction (PLIC) to reconstruct the free surface. The influence of process parameters, including impacting velocity, relative distances between two successive molten droplets, substrate temperature, and droplet size on end-shape morphology is simulated during formation of 7075 aluminum alloy by microdroplets. The numerical models are validated with recent experimental results, and the comparison between the numerical simulations and the experimental findings shows good agreement. The results show that the determination of reasonable impact velocity and droplet relative distances is the key to obtaining good precision and quality. Under the conditions of 100-μm-diameter molten 7075 aluminum alloy droplets on a stainless steel surface at temperature 350 K with velocity 1.5 m/s, the distance between two successive droplets is 200 μm and a better forming effect can be obtained. The results provide a reference for the implementation of effective process control in metal microdroplet deposition manufacture.


Articles with similar content:

MODELLING AND EXPERIMENTAL INVESTIGATION OF THE SHAPE CHANGE OF A SESSILE WATER DROPLET DURING FREEZING
International Heat Transfer Conference 16, Vol.8, 2018, issue
Xin Liu, Jingchun Min, Xuan Zhang
APPLYING THE CONTINUOUS-TIME RANDOM WALK MODEL TO NON-FICKIAN DISPERSION IN MISCIBLE DISPLACEMENT THROUGH CARBONATE ROCK
Journal of Porous Media, Vol.22, 2019, issue 1
Yeison Villamil, Osvair V. Trevisan, J. A. Vidal Vargas
MODELING CONTAMINANT TRANSPORT IN SATURATED SOIL COLUMN WITH THE CONTINUOUS TIME RANDOM WALK
Journal of Porous Media, Vol.18, 2015, issue 12
Shahram Shahmohammadi-Kalalagh
RELEVANT PARAMETERS FOR LASER BONDING OF COPPER ON ALUMINA
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.10, 2006, issue 2
J. C. Labbe, Pierre Lefort, J. Jarrige, S. Menecier
HYBRID LATTICE BOLTZMANN AND FINITE VOLUME METHODS FOR FLUID FLOW PROBLEMS
International Journal for Multiscale Computational Engineering, Vol.12, 2014, issue 3
Mo Yang, Zheng Li, Yuwen Zhang