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Technical Briefs

Simulation of Sphere’s Motion Induced by Shock Waves

[+] Author and Article Information
Dan Igra

 RAFAEL, Aerodynamics Group, P.O. Box 2250, Haifa, 31021, Israeldanigra@gmail.com

Ozer Igra

 Department of Mechanical Engineering, Ben Gurion University, P.O. Box 653, Beer Sheva, 84105, Israel

Lazhar Houas, Georges Jourdan

 IUSTI-CNRS, Aix-Marseille Universite, 5 rue Enrico Fermi, Marseille, 13013, France

J. Fluids Eng 134(10), 104502 (Sep 28, 2012) (4 pages) doi:10.1115/1.4007385 History: Received October 07, 2011; Revised August 07, 2012; Published September 24, 2012; Online September 28, 2012

Simulations of experimental results appearing in Jourdan (2007, “Drag Coefficient of a Sphere in a Non-Stationary Flow: New Results,”Proc. R. Soc. London, Ser. A, 463 , pp. 3323–3345) regarding acceleration of a sphere by the postshock flow were conducted in order to find the contribution of the various parameters affecting the sphere drag force. Based on the good agreement found between present simulations and experimental findings, it is concluded that the proposed simulation scheme could safely be used for evaluating the sphere’s motion in the postshock flow.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 5

Grid study for case 179 b

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Figure 4

Grid study for case 148

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Figure 3

Simulated and measured sphere’s trajectory and velocity for run 142. Incident shock wave Mach number 3.6, driver/driven gases He/Ar, initial pressure 70 mbar, sphere diameter 1.92 mm, and its material density is 1130 kg/m3 .

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Figure 2

Simulated and measured sphere’s trajectory and velocity for run 179 b. Incident shock wave Mach number 4.35, driver/driven gases He/air, initial pressure 24 mbar, sphere diameter 1.92 mm, and its material density is 1130 kg/m3 .

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Figure 1

Simulated and measured sphere’s trajectory and velocity for run 148. Incident shock wave Mach number 1.56, driver/driven gases air/air, initial pressure 1 bar, sphere diameter 1.92 mm, and its material density is 1130 kg/m3 .

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