Turbulent wall jet in blast wave precursor

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6565491

Kuhl, A L

Numerical simulations of the turbulent dusty flow induced by an explosion over a ground surface were performed with a second-order Godunov code. Adaptive Mesh Refinement was used to capture the convective mixing processes on the computational grid. The most prominent feature of the flow was a turbulent wall jet that was induced by the precursor shock refraction into a thermal layer on the surface. Dust lofting occurred because the rotational structures of the boundary layer entrained dust from the ground surface. Scaling methods were defined in order to evaluate the mean and r.m.s. profiles of the wall jet. The profiles were shown to be similar to the profiles calculated for self-similar wall jets propagating over dust layers, and agreed with experimental profiles of a dusty boundary layer behind a shock. The Convective Mixing Model described here can be applied to a wide spectrum of fluid-dynamic mixing problems.

• Research Organization: Lawrence Livermore National Lab., El Segundo, CA (United States)
• Sponsoring Organization: DOD; Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6565491
• Report Number(s): UCRL-JC-112713; CONF-9301100--1; ON: DE93011955
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100 -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
450200 -- Military Technology
Weaponry
& National Defense-- Nuclear Explosions & Explosives
661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
COMPUTERIZED SIMULATION
CONSERVATION LAWS
DETONATION WAVES
DUSTS
EXPLOSIONS
FLUID FLOW
FLUID MECHANICS
JETS
MECHANICS
MESH GENERATION
MIXING
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
SHOCK WAVES
SIMULATION
TURBULENT FLOW