What is it about?
Splashing occurs when a drop falls and impacts on a surface at a velocity high enough which causes the drop to break up and eject secondary droplets. By using high-speed camera, we collected images of splashing and nonsplashing drops. By using the collected images, we trained an AI to classify splashing and nonsplashing drops. After the AI learnt to classify images of splashing and nonsplashing drops accurately, we checked how does the AI perform the classification. As expected, the main characteristics that the AI checks is the breaking up of the drop's main body and the ejection of the secondary droplets. Remarkably, the AI also checks the contour of the drop’s main body. In other words, the contour is high, the AI will classify the drop as a splashing drop. The difference in the contour height between splashing and nonsplashing drops has not been reported prior to our study.
Photo by ANIRUDH on Unsplash
Why is it important?
Usually, an AI that can accurately classify images is quite complicated and it is almost impossible to understand how it works. However, in our study, we managed to train a simple AI to accurately classify image of splashing and nonsplashing drops and to understand the classification process of the AI. As a result, the AI helped us to discover a difference between splashing and nonsplashing drops that has not been reported before, that is the contour of a splashing drop is higher than that of a nonsplashing drop. Therefore, by understanding how an AI works, we can use it to observe physical phenomena and find new perspectives from it.
Read the Original
This page is a summary of: Image features of a splashing drop on a solid surface extracted using a
feedforward neural network, Physics of Fluids, January 2022, American Institute of Physics, DOI: 10.1063/5.0077050.
You can read the full text:
High-speed videos of splashing and nonsplashing drops
The high-speed videos of splashing and nonsplashing drops recorded during the experiment is available on the website of Physics of Fluids.
Official Code on GitHub
The official code of the AI for image classification is available on GitHub
Image-sequence classification of splashing and nonsplashing drops using AI
We extended our study to image-sequence classification and presented it during AIAA Aviation 2022 Forum. The article has been selected to appear in the AIAA Showcase on Kudos.
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