The Rouse number (P or Z) is a non-dimensional number in fluid dynamics which is used to define a concentration profile of suspended sediment and which also determines how sediment will be transported in a flowing fluid. It is a ratio between the sediment fall velocity w s {\displaystyle w_{s}} and the upwards velocity on the grain as a product of the von Kármán constant κ {\displaystyle \kappa } and the shear velocity u ∗ {\displaystyle u_{*}} .
The Rouse number (P or Z) is a non-dimensional number in fluid dynamics which is used to define a concentration profile of suspended sediment and which also determines how sediment will be transported in a flowing fluid. It is a ratio between the sediment fall velocity w s {\displaystyle w_{s}} and the upwards velocity on the grain as a product of the von Kármán constant κ {\displaystyle \kappa } and the shear velocity u ∗ {\displaystyle u_{*}} .
Source: Wikipedia "Rouse number" · CC BY-SA 4.0
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