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Keywords: contact angle
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Proceedings Papers

Proc. ASME. IMECE2020, Volume 10: Fluids Engineering, V010T10A038, November 16–19, 2020
Paper No: IMECE2020-23901
... such as the thickness (micrometer-range) and the ultra small contact angle less than 6 degree can be successfully determined with a reasonable agreement with the measurement. This outcome can be used to measure the morphological features of droplets and to characterize uneven surface features like human fingerprinting...
Proceedings Papers

Proc. ASME. IMECE2020, Volume 10: Fluids Engineering, V010T10A039, November 16–19, 2020
Paper No: IMECE2020-24255
... of liquid droplet such as the thickness, the contact angle, and the dual profile using internal reflection interferometry. A coherent laser beam is internally reflected on the air/liquid interface of a sessile droplet placed on a prism- based substrate to produce an interference fringe on a screen far from...
Topics: Drops, Reflection
Proceedings Papers

Proc. ASME. IMECE2019, Volume 7: Fluids Engineering, V007T08A006, November 11–14, 2019
Paper No: IMECE2019-10921
... Abstract The contact angle is a measurement of wettability of a solid surface resulting from molecular attraction or repulsion at the encounter point between a liquid-gas interface and a wall. To date, the determination of the contact angle is commonly performed experimentally with very limited...
Proceedings Papers

Proc. ASME. IMECE2013, Volume 7B: Fluids Engineering Systems and Technologies, V07BT08A006, November 15–21, 2013
Paper No: IMECE2013-62948
... droplet spreading SPH textured surface contact angle Droplet spreading occurs when a water drop hits the surfaces in a relatively low speed, which is a very important process in many applications (for example printing technologies and especially observation of diffusion of liquid state...
Topics: Drops
Proceedings Papers

Proc. ASME. IMECE2012, Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D, 2743-2749, November 9–15, 2012
Paper No: IMECE2012-87394
...). A novel iteration algorithm is proposed to study the time evolution of contact angle. From the numerical results, we derived a universal correlation of the contact angle with the dimensionless time. The correlation, which is validated against experimental data from open literature, is independent...
Proceedings Papers

Proc. ASME. IMECE2011, Volume 10: Heat and Mass Transport Processes, Parts A and B, 613-617, November 11–17, 2011
Paper No: IMECE2011-64357
... to conduct because of how small its scale. In the present work the accurate geometry of the region near the three-phase contact line was obtained by directly scanning the thin-film region with atomic force microscopy (AFM). The contact angles were directly extracted from the results and compared...
Proceedings Papers

Proc. ASME. IMECE2011, Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B, 69-76, November 11–17, 2011
Paper No: IMECE2011-62940
... It is recognized that small liquid droplet placed on the solid substrate forms equilibrium contact angle that can be obtained from well-known Young’s law. Previously, deviations from Young’s law were demonstrated for the droplets exposed to external fields (gravity, electric, etc...
Proceedings Papers

Proc. ASME. IMECE2010, Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B, 1441-1447, November 12–18, 2010
Paper No: IMECE2010-40257
... Polyvinyl chloride (PVC) fibers incorporated with graphene nanoflakes were produced using electrospinning technique, and then superhydrohobicity of the electrospun nanofibers were investigated as a function of inclusion and temperature. In the absence of graphene, water contact angle...
Proceedings Papers

Proc. ASME. IMECE2010, Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B, 945-953, November 12–18, 2010
Paper No: IMECE2010-39672
... the liquid and the gas phases such that the motion of the liquid droplets can be observed. Effects of the incoming velocity are evaluated. In addition, the surface hydrophobic properties are influential to the droplets motion; therefore, the contact angle of the liquid droplet attached on the channel wall...
Proceedings Papers

Proc. ASME. IMECE2008, Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B, 755-759, October 31–November 6, 2008
Paper No: IMECE2008-67299
... 24 08 2009 A new droplet microgripper that can pick up and release micro objects by electrowetting is presented. Electrowetting is utilized to dynamically change the contact angle between the liquid bridge and the gripper surface to control the capillary lifting forces. A coplanar...
Proceedings Papers

Proc. ASME. IMECE2007, Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B, 1039-1045, November 11–15, 2007
Paper No: IMECE2007-42719
... interface section with surface wettability is observed. Capillary pressure contact angle multi-phase pressure drop/flow resistance wettability FProceedings of IMECE2007 2007 ASME International Mechanical Engineering Congress and Exposition November 11-15, 2007, Seattle, Washington, USA IMECE2007...
Proceedings Papers

Proc. ASME. IMECE2003, Manufacturing, 621-629, November 15–21, 2003
Paper No: IMECE2003-41161
... Bonding Hydrophobic Contact Angle Voids Pin Diodes Proceedings of IMECE03: 2003 ASME International Mechanical Engineering Congress and Exposition as . d e - ea r Proceedings of IMECE 03 2003 ASME Internation l Mechanical Engine ring Congress measurement of doping carrier concentration as a function...
Proceedings Papers

Proc. ASME. IMECE2004, Heat Transfer, Volume 2, 577-582, November 13–19, 2004
Paper No: IMECE2004-60565
... used for increasing boiling heat transfer like ethanol-water mixtures. The mixture with 16% ethanol by weight had the lowest contact angle (associated to the lowest interfacial energy) and produced the highest convective heat transfer coefficient, h. Thus, the maximum for h correlates with an increase...
Proceedings Papers

Proc. ASME. IMECE2005, Fluids Engineering, 157-162, November 5–11, 2005
Paper No: IMECE2005-81007
... In this paper, we study in detail the electrowetting behavior of a liquid-metal droplet (mercury) on top of a dielectric insulating layer experimentally. 74° of the contact angle change (from 141° to 67°) is achieved by applying a voltage of 180V to a mercury droplet on a Parylene surface...