Abstract
This paper presents a new device for the measurement of local shear stress, based on floating-element technique, on a three-dimensional body surface submerged in water. Improvements are made for the new meter to eliminate the flow passing through the gap around its element completely, to reduce the force due to the pressure acting on the side of the floating element, and to satisfy approximately the no-slip condition for the flow at the gap. The measurements of local shear stress are carried out on the surfaces of a flat plate, a two-dimensional body and a streamlined body. The experimental results agree very well with the calculated ones, which shows that the device determines the wall shear stress of a submerged three-dimensional body accurately.
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