METHOD AND DEVICE FOR MEASURING SHEAR STRESS DISTRIBUTION OF FLOW FIELD

摘要

PROBLEM TO BE SOLVED: To provide a method and device for measuring shear stress distribution of a flow field, capable of accurately obtaining the shear stress distribution based on velocity variation of the flow field due to an agitation blade without using an empirical formula obtained by testing.

SOLUTION: A velocity vector of a target flow field 7 is measured by a particle image velocity measuring device 10 (S1), an average velocity and velocity variation of the flow field are calculated from the velocity vector (S2), all components of Reynolds stress and an average velocity gradient are calculated on the basis of the result of the calculation (S3, S4), a dissipation rate ε of turbulence energy E is calculated from the Reynolds stress and the average velocity gradient (S5, S6), and the distribution of shear stress τ based on the velocity variation is calculated from the dissipation rate ε (S7).

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