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Ultra-High Speed Particle Image Velocimetry on Drop-on-Demand Jetting

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An experimental setup to study the dynamics of droplet jetting from a commercially available print-head is described. A MicroFab print-head with an 80 μm diameter transparent nozzle was set to print droplets at a speed of 5 m/s at a frequency of 7 kHz. A Particle Image Velocimetry (PIV) scheme consisting of an optical microscope coupled to an ultra-high speed camera is utilized to capture the motion of particles suspended in a model transparent ink. This experimental arrangement images the flow at the centre of a glass cylindrical nozzle and above the fluid meniscus at a speed of half a million frames per second. Velocity fields are obtained from an approximately 200 μm thickness layer of fluid at the inside of the nozzle. Experimental results are compared with Lagrangian finite-element numerical simulations under identical fluid and jetting conditions with good agreement. The advantages, challenges and current limitations of this approach are discussed.
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Document Type: Research Article

Publication date: January 1, 2011

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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