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| 单词 | reynolds number |
| 释义 | > as lemmasReynolds number Reynolds number n. (also Reynolds' number (now rare)) a dimensionless number used in fluid mechanics to characterize fluid flow past a body or in a duct, having for any given system a critical value above which the flow is turbulent. Symbol Re.Typically evaluated as ρvd/ μ, where ρ is the density of the fluid, v is the speed of the fluid relative to the body or duct, d is a diameter or other characteristic length, and μ is the absolute viscosity of the fluid.In a smooth straight uniform pipe, laminar flow typically occurs for a Reynolds number less than 2000; turbulent flow is typically established for one greater than 3000.extracted from Reynoldsn.< as lemmas |
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