Bold = the author (Daehyun Choi).   * = co-first authorship.   † = co-corresponding author.   Full list on Google Scholar.

Under Review / In Preparation

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  D. Choi*^†, I. Bergerson*, H. Zhu*, T. Lan & S. Bhamla^†, "Swim-and-breach at palm scale: a rudder-steered two-propeller underwater robot platform with differential-thrust pitch control," arXiv:2609.17240 (2026). Under review. arXiv
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  D. Choi, H. J. Wallace, P. Singh, C. Bose & S. Bhamla, "Bi-objective Bayesian optimization of soft nozzle geometry for rotary propeller," In preparation.
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  P. Singh*, Y. Karki*, V. Hernandez, D. Choi, S. Bhamla & C. Bose, "Multi-objective Bayesian optimization of rigid and flexible nozzles for energy-efficient pulsed jet propulsion," arXiv:2606.19252 (2026). Under review. arXiv
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  D. Choi, K. L. Yung, H. Wallace, J. Harrison & S. Bhamla, "Interfacial dynamics on the water-hopping behavior of mudskipper," In preparation.
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  D. Choi, P. Singh, I. Bergerson, M. Kim, J. Park, H. J. Wallace, K. Zhang, S. Y. Hsieh, A. T. Asberry, T. A. Uyeno, W. F. Gilly, H. Park, D. Kang, C. Bose & S. Bhamla, "Squid funnels time their elastic recoil to amplify pulsed jets," arXiv:2605.03239 (2026). Under review. arXiv
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  D. Choi*, P. Singh*, S. Bhamla & C. Bose, "Computational and reduced-order modelling of elastic wave-driven impulse enhancement in pulsed jets through passively flexible nozzles," arXiv:2605.17319 (2026). Under review. arXiv
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  P. Rohilla, J. N. O'Neil, P. Singh, V. M. Ortega-Jimenez, D. Choi, C. Bose & S. Bhamla, "Interfacial vortex recapture enhances thrust in tiny water skaters," bioRxiv 2024.06.17.599397 (2025). Under review. bioRxiv

Refereed Journal Articles

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  D. Choi, K. Yung, I. Bergerson, H. Wallace, U. Grafe & S. Bhamla, "Three-dimensional tracking method for water-hopping mudskippers in natural habitats," Integr. Comp. Biol., 65, 1699–1713 (2025). DOI PDF
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  P. Rohilla*, D. Choi*, H. Wallace*, K. L. Yung*, J. Deora, A. Lele & S. Bhamla, "Mastering the Manu—how humans create large splashes," Interface Focus, 15, 20240056 (2025). DOI PDF
  Press: Georgia Tech News · PBS NewsHour · Science News · The Conversation
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  D. Choi & H. Park, "Mechanism of enhanced impulse and entrainment of a pulsed jet through a flexible nozzle," J. Fluid Mech., 996, A6 (2024). (Emerging Scholar Best Paper Prize, Top 10, JFM 2025) DOI PDF
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  D. Choi*, H. Kim* & H. Park, "Bubble velocimetry using the conventional and CNN-based optical flow algorithms," Sci. Rep., 12, 11879 (2022). DOI PDF GitHub
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  D. Choi & H. Park, "Flow–structure interaction of a starting jet through a flexible circular nozzle," J. Fluid Mech., 949, A39 (2022). DOI PDF
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  D. Choi, J. Byun & H. Park, "Analysis of liquid column atomization by annular dual-nozzle gas jet flow," J. Fluid Mech., 943, A25 (2022). DOI PDF
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  D. Lee, D. Choi, H. Park, H. Lee & S. J. Kim, "Electroconvective circulating flows by asymmetric Coulombic force distribution in multiscale porous membrane," J. Membr. Sci., 636, 119286 (2021). DOI PDF
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  D. Choi & H. Park, "Flow around in-line sphere array at moderate Reynolds number," Phys. Fluids (Editor's Pick), 30, 097104 (2018). DOI PDF

Conferences & Seminars

• "Multi-fidelity optimization of a soft nozzle–propeller system," APS Global Physics Summit, Oral, Denver, USA, 2026.
• "Hydrodynamics of water-hopping behavior of mudskippers," SICB 2026, Oral (Symposium), Portland, USA, 2026.
• "Squid-inspired flexible nozzles improve thrust in rotary propulsors using a multi-fidelity approach," SICB 2026, Oral, Portland, USA, 2026.
• "Squid funnel-inspired passively flexible nozzles for underwater propulsion," SICB 2026, Oral, Portland, USA, 2026.
• "Geometrical effects of free-end nozzles on wave reflection in self-oscillating flexible nozzles," APS-DFD 78th, Oral, Houston, USA, 2025.
• "Bio-inspired flexible nozzle design for enhanced underwater propulsion," Fluid and Biodynamics Seminar, Max Planck Institute for Dynamics and Self-Organization (Invited), Göttingen, Germany, 2025.
• "Squid-inspired nozzles for enhanced thrust in rotary propulsors," EUROMECH Colloquium 654: Bio-inspired Fluid–Structure Interaction, Oral, Vienna, Austria, 2025.
• "Squid-inspired nozzles for enhanced thrust in rotary propulsors," APS March Meeting, Oral, Anaheim, USA, 2025.
• "Non-invasive 3D tracking of water-hopping mudskippers in natural habitats," SICB 2025, Poster, Atlanta, USA, 2025.
• "Biological observation and physical modelling of water-hopping mudskipper," APS-DFD 77th, Poster, Salt Lake City, USA, 2024.
• "Water-hopping behavior of mudskipper," IUTAM Symposium on Capillarity and Elastocapillarity in Biology, Poster, Seoul, Korea, 2024.
• "Hydrodynamics of water-hopping mudskipper," iPoLS Annual Meeting, Oral, Trieste, Italy, 2024.
• "Hydrodynamic study on the water-hopping behavior of mudskipper," APS March Meeting, Oral, Minneapolis, USA, 2024.
• "Vortex mechanism in microvelia-inspired water-walking for thrust optimization using robotic design," SICB 2024, Poster, Seattle, USA, 2024.
• "Experimental study on the starting jet through the flexible circular nozzle," ACEM 2022, Oral, Seoul, Korea, 2022.
• "On the optimal flexibility condition of an impulsive starting jet nozzle for thrust generation," APS-DFD 73rd, Oral, Online, 2020.
• "Experimental study on the effect of nozzle flexibility on the evolution of a starting liquid jet," APS-DFD 72nd, Oral, Seattle, USA, 2019.
• "Study on dual-nozzle jet flows for the application of liquid atomization," APS-DFD 71st, Oral, Atlanta, USA, 2018.
• "Experimental study on the flow around in-line array of spheres," APS-DFD 69th, Oral, Portland, USA, 2016.