Congratulations to CAMPhyRE student Yushu Lin on publishing "Effect of droplet deformation and internal circulation on drag coefficient" in the journal Physical Review Fluids! Here's a brief summary of the article: In the study of sprays, a theoretical gap exists between droplet modeling and reality, especially in high pressure applications like jet engine combustion. In this paper, we used interface-capturing direct numerical simulations of freely deforming droplets to demonstrate the impact of droplet deformation and liquid internal circulation on drag. Over 200% increase in drag can be seen, depending on the conditions studied. We further showed that these phenomena can be quantified by the pressure and the Weber number, and a correlation for droplet drag was obtained based on these factors. The full article can be found on the journal website at this link: https://doi.org/10.1103/PhysRevFluids.7.123602
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