Abstract
The objective of this study was to model the unsteady fluid force acting on limbs in swimming, based on the experiments using an underwater robot arm. First, overview of the robot arm and the experiments were briefly described. Next, the modeling method of the robot arm and the unsteady fluid force, as well as the identification method of the coefficients in the fluid force model were described. The significantly large values of the identified coefficients for the arm suggest the possibility of underestimating the contribution of the arm to the thrust in the previous studies. The good agreement between the experiment and simulation for all strokes shows the validity of the model.
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