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ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336
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SHOCK PROFILES AND WAKE STRUCTURES IN GRANULAR FLOW PAST OBSTACLES
ABSTRAKT
Granular flows exhibit intriguing features that can draw parallels to continuum flow or the discrete nature of the material as a result of complex interaction between granular particles. In the present work, we explore two features: the bow shock and wake structures formed when a bluff body is submerged in quasi-two-dimensional granular flows. The article discusses how the shape of the obstacle affects these formations. The experiments use circular, square, and triangular cylinders and several flow velocities. Flow visualization is done by shadowgraph technique, and particle-image-velocimetry (PIV) is also used to analyze the flow. In addition, an attempt to formulate mathematical equations to fit the shock profiles is made. Velocity profiles for the flow between the wake and the shock, and wake angles have been presented for a circular obstacle.
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