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泰勒冻结假设概念以及相应的应用？. - 知乎 field of turbulence past a fixed point can be taken to be entirely due to the mean flow; also known as the Taylor "frozen turbulence" hypothesis It only holds if the relative turbulence intensity is small; that is, , where U is the mean velocity and u the eddy velocity Then the substitution t = x U is a good approximation