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出典:Wikipedia
出典:『Wikipedia』 (2011/03/21 11:28 UTC 版)
The Shields parameter, also called the Shields criterion or Shields number, is a nondimensional number used to calculate the initiation of motion of sediment in a fluid flow. It is a nondimensionalization of a shear stress, and is typically denoted or θ. It is given by:
Shields parameter