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Effects of microstructure on shock propagation in foams

Published online by Cambridge University Press:  01 June 2004

F. PHILIPPE ,
B. CANAUD ,
X. FORTIN ,
F. GARAUDE  and
H. JOURDREN
F. PHILIPPE
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique/DAM Ile-de-France, Bruyères-le-Châtel, France
B. CANAUD
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique/DAM Ile-de-France, Bruyères-le-Châtel, France
X. FORTIN
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique/DAM Ile-de-France, Bruyères-le-Châtel, France
F. GARAUDE
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique/DAM Ile-de-France, Bruyères-le-Châtel, France
H. JOURDREN
Affiliation:
Département Sciences de la Simulation et de l'Information, Commissariat à l'Energie Atomique/DAM Ile-de-France, Bruyères-le-Châtel, France
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Abstract

Foams are an important component of various inertial confinement fusion target schemes. The propagation of shock waves in foams is also an important issue for many other laser experiments (e.g., laboratory astrophysics experiments). The usual approach is to assume that the foam can be considered as a homogeneous mixture. Taking into account the effects of foam heterogeneity leads to increased shock velocity and reduced compressibility. Evidence of this effect is obtained using two-dimensional adaptive mesh refinement Eulerian numerical simulations. Nonetheless, for the very low density foams filled with DT ice used in recent direct drive target designs, the homogeneous mixture model provides adequate shock timing, density, and pressure profiles.

Keywords

FoamHeterogeneous mediaShock
Type
Research Article
Information
Laser and Particle Beams , Volume 22 , Issue 2 , June 2004 , pp. 171 - 174
Copyright
© 2004 Cambridge University Press

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References

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