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循環 (流体力学)
Wikipedia definition
1. Circulation (fluid dynamics)In fluid dynamics, circulation is the line integral around a closed curve of the fluid velocity. Circulation is normally denoted . If is the fluid velocity on a small element of a defined curve, and is a vector representing the differential length of that small element, the contribution of that differential length to circulation is : where is the angle between the vectors and .
Read “Circulation (fluid dynamics)” on English Wikipedia
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Read “Circulation (fluid dynamics)” on DBpedia

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