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In the smoothed particle hydrodynamics (SPH) fluid simulation method, thesmoothing length affects not only the process of neighbor search but also the calculation accuracy of the pressure solver. Therefore, it plays a crucial role in ensuring the accuracy and stability of SPH. Methods: In this study, an adaptive SPH fluid simulation method with a variable smoothing length is designed. In this method, the smoothing length is adaptively adjusted according to the ratio of the particle density todoi:10.1016/j.vrih.2018.12.001 doaj:c323962a2c5e4dc9b49a6e9dff84e575 fatcat:3w2mdquxxnhh7mwhyowq65bsqa