... formation and found that the formation was least likely to occur when the main-drop spacing was five to seven times the jet diameter ( 23 ). Rallison found that drops with a low viscosity achieved a stable shape and were only broken by a high flow rate fluid ( 24 ). On the numerical side, Lee found...

... Mixtures ,” Proc. R. Soc. London, Ser. A 0950-1207 , 444 ( 1922 ), pp. 573 – 581 . 10.1098/rspa.1994.0039 Harkins , W. D. , and Brown , F. E. , 1919 , “ The Determination of Surface Tension (Free Surface Energy), and the Weight of Falling Drops: The Surface Tension of Water...

... or is roughened. 27 11 2007 05 01 2009 27 03 2009 drops flexible manufacturing systems liquid metals rapid prototyping (industrial) surface roughness wetting Chen , C. -A. , and Chun , J. -H. , 1997 , “ Development of a Droplet-Based Manufacturing Process for Free...

... use the observations made with two droplets to predict conditions when a line of droplets will no longer be continuous, but will break up due to drawback. When two overlapping droplets are deposited on a surface, the far edge of the second drop is located (see Fig. 16 ) at x = ( D s + L...

.... 13 10 2006 22 01 2007 12 06 2008 cutting milling micromachining sprays drops aerodynamics milling machines cutting tools coolants Micromachining, in particular, micromilling and microdrilling, provides both a viable and potentially preferable process to satisfy...

...Taik-Min Lee; Tae Goo Kang; Jeong Soon Yang; Jeongdai Jo; Kwang-Young Kim; Byung-Oh Choi; Dong-Soo Kim In this paper, we present the design, fabrication, and performance test of a gap adjustable molten metal drop-on-demand (DoD) inkjet system with a cone-shaped piston head, which can eject...

... presents an analytical model to estimate evaporation time for the impacting drops at surface temperatures above Leidenfrost, 300 – 450 ° C . It is based on the suspension of deformed droplet on a vapor cushion sustained by a continuous supply of water from the drying droplet. Model predictions...

... 2007 finite difference methods drops dies (machine tools) sprays lubricants suspensions lubrication hot working forging lubrication droplet impact finite difference isothermal In the hot forging processes, the dies are lubricated and cooled by spraying dilute water based...

... bonding between droplets and uniform diameter. 01 01 2006 20 09 2006 liquid metals drops solidification heat transfer rapid prototyping (industrial) liquid phase deposition production engineering computing droplet-based manufacturing droplet deposition remelting...

... and Engineering of Droplets , Noyes , New York. Sohn , H. , and Yang , D. Y. , 2004 , “ Drop-on-Demand Deposition of Superheated Metal Droplets for Selective Infiltration Manufacturing ,” Mater. Sci. Eng., A 0921-5093 10.1016/j.msea.2004.09.049 , 392 ( 1–2 ), pp. 415 – 421 . Pasandideh...

..., the concentration decays exponentially at a rate of decrease that is largely associated with the settling mechanism. When the concentration drops below the critical level, evaporation may occur. An evaporation model has been established for situations in which the number concentration level is below the critical...

... Mar 2003 01 Feb 2004 07 09 2004 cutting lubricants coolants fluid dynamics turning (machining) drops sprays Part 1 of this paper outlined the benefits and concerns associated with the use of cutting fluid and the development of an analytical model that includes the mist...

... drops per second, impacting with an initial temperature of approximately 2573 K); however, attempts are not made to reproduce the precise shape and the contact angle between a typical droplet edge and the substrate. Comparison of results from these 3-D simulations to those from axisymmetric droplet...

... 2000 manufacturing processes forming processes melting stress analysis thermomechanical treatment drops Solid Freeform Fabrication (SFF) processes allow a computer-aided-design (CAD) model of a part to be transformed into a three-dimensional shape by building the part layer by layer...

... for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING . Manuscript received March 1999; revised March 2000. Associate Editor: J. Lee. 01 March 1999 01 March 2000 arc welding drops mass transfer heat transfer In a gas metal arc welding (GMAW) process with argon...

... by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING . Manuscript received Nov. 1998; revised Sept. 1999. Associate Technical Editor: K. Stelson. 01 Nov 1998 01 Sept 1999 aluminium drops manufacturing processes capillarity...