Survey of shock-wave structures of smooth-particle granular flows.

Autor:	Padgett DA; Engineering Mechanics and Space Systems Laboratory, Department of Mechanical and Aerospace Engineering, North Carolina State University, Box 7910, Raleigh, North Carolina 27695, USA., Mazzoleni AP; Engineering Mechanics and Space Systems Laboratory, Department of Mechanical and Aerospace Engineering, North Carolina State University, Box 7910, Raleigh, North Carolina 27695, USA., Faw SD; Engineering Mechanics and Space Systems Laboratory, Department of Mechanical and Aerospace Engineering, North Carolina State University, Box 7910, Raleigh, North Carolina 27695, USA.
Jazyk:	angličtina
Zdroj:	Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2015 Dec; Vol. 92 (6), pp. 062209. Date of Electronic Publication: 2015 Dec 28.
DOI:	10.1103/PhysRevE.92.062209
Abstrakt:	We show the effects of simulated supersonic granular flow made up of smooth particles passing over two prototypical bodies: a wedge and a disk. We describe a way of computationally identifying shock wave locations in granular flows and tabulate the shock wave locations for flow over wedges and disks. We quantify the shock structure in terms of oblique shock angle for wedge impediments and shock standoff distance for disk impediments. We vary granular flow parameters including upstream volume fraction, average upstream velocity, granular temperature, and the collision coefficient of restitution. Both wedges and disks have been used in the aerospace community as prototypical impediments to flowing air in order to investigate the fundamentally different shock structures emanating from sharp and blunt bodies, and we present these results in order to increase the understanding of the fundamental behavior of supersonic granular flow.
Databáze:	MEDLINE
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