Two-dimensional measurements of flow velocity in a microscopic region using two rotating gratings |
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| Authors: | J Ritonga T Ushizaka T Asakura |
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| Institution: | (1) Research Institute of Applied Electricity, Hokkaido University, 060 Sapporo, Hokkaido, Japan |
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| Abstract: | A two-dimensional vector velocimeter is proposed on the basis of the time-varying spatial filtering method using a rotating disc with two transmission gratings. The filtering characteristics of the spatial filter used in the velocimeter are studied theoretically. This velocimeter was applied to measure the velocity vector of flowing water in a small glass pipe. The experimental results show the usefulness of the present velocimeter for measurements of the flow velocity in a microscopic region. |
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