Circulatory Streaming in the Vicinity of an Oscillating Square Cylinder

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概要

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• The steady flow generated by an oscillating square cylinder immersed in a viscous, incompressible fluid is investigated experimentally. The flow pattern in the vicinity of the cylinder is classified into three types according to non-dimensional parameters r_0√<ω/ν> and s/r_0 where r_0 is half the side length of the model section, ω the angular frequency, ν the kinematic viscosity and s the oscillation amplitude. Especially, when the oscillation amplitude is small, the flow pattern depends on the value of r_0√<ω/ν>. If r_0√<ω/ν><1, then one vortex system exists close by the cylinder in each quadrant. The flow, however, separates from the cylinder at the edge and twin vortices are formed between the primary vortex systems and the square sylinder side parallel to the axis of oscillation in the range of 5>r_0√<ω/ν>>1. When r_0√<ω/ν>>5, two vortex systems are generated in close visinity to the cylinder.

• 社団法人日本物理学会の論文
• 1974-04-15

著者

• Tatsuno Masakazu

  Research Institute For Applied Mechanics Kyushu University

関連論文

• The Behaviour of Tracer Particles in Flow Visualization by Electrolysis of Water
• Circulatory Streaming in the Vicinity of an Oscillating Triangular Cylinder
• Circulatory Streaming around an Oscillating Circular Cylinder at Low Reynolds Numbers
• Secondary Flow Induced by a Circular Cylinder Performing Unharmonic Oscillations
• Visualization of the Unsteady Flow past Cylinders and Plates Decelerated from Steady Speed
• Effects of interference among three equidistantly arranged cylinders in a uniform flow
• Circulatory Streaming in the Vicinity of an Oscillating Square Cylinder
• Two Pairs of Rectilinear Vortices
• Vortex Rings in a Stratified Fluid

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