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This process is modeled using Computational Fluid Dynamics (CFD) to characterize the response and attempt to understand the swimming orientation. In simulation, using ; the phoretic mobility of the particle, ; the production rate of the particle and , the initial angle of the particle, these Pacman particles orientate their bodies according to self\u2010generated fluid flows. Furthermore, the ability of Pacman particles to respond to chemical and light stimuli is studied in experiments. 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