Jisho

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(流体)
Wikipedia definition
1. Hydrodynamical helicityHydrodynamical helicity this page is about helicity in fluid mechanics. For helicity of magnetic fields, see magnetic helicity. For helicity in particle physics, see helicity (particle physics). In fluid mechanics, helicity is the extent to which helix-like motion occurs. If a parcel of fluid is moving, undergoing solid body motion rotating about an axis parallel to the direction of motion, it will have helicity.
Read “Hydrodynamical helicity” on English Wikipedia
Read “ヘリシティー (流体)” on Japanese Wikipedia
Read “Hydrodynamical helicity” on DBpedia

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