What is it about?

As a jet of water spreads over a pre-coated, rotating substrate, rivulets emerge from the perimeter. We trace and digitally measure these rivulets to explore their rich variety of morphologies.

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Why is it important?

By understanding how water from a rinsing spray spreads over a silicon wafer, we can determine the most effective and most efficient way to clean silicon wafers while printing microelectronics on them. Even a microscopic contaminant can ruin an entire silicon wafer of electronics, so thoroughly rinsing them between production stages is essential for a functional product.


We believe that our publication offers a new method for high-speed tracking of flow across a surface without the use of dyes or other additives to the liquid. Furthermore, by parsing these images with image-processing techniques, we open up the analysis of spreading flows to study by modern image-processing techniques built on advances in machine learning and artificial intelligence.

Andrew Ylitalo
California Institute of Technology

Read the Original

This page is a summary of: Evolution of rivulets during spreading of an impinging water jet on a rotating, precoated substrate, Physics of Fluids, August 2019, American Institute of Physics, DOI: 10.1063/1.5109806.
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