標位関数法による液体へ侵入する固体粒子挙動の数値解析

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  • Numerical Analysis of Particle Behavior Penetrating into Liquid by Level Set Method.
  • ヒョウイ カンスウホウ ニ ヨル エキタイ エ シンニュウ スル コタイ リュウシ キョドウ ノ スウチ カイセキ

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A numerical analysis technique using the level set method has been developed to calculate the critical velocity of a particle for penetration into liquid. The contact angle, a dominant factor in this phenomenon, is given by a virtual liquid surface inside a solid wall. A Cartesian grid method with immersed boundaries is also applied in order to accurately express the boundaries of a moving particle. Current results agree with other calculated and experimental results in both contact-angle problems and immersed-boundary problems. Finally, calculations of a particle impinging on a liquid surface have been carried out. Current results of the critical velocity agree with the experimental results and theoretical results.

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