RADIOGRAPHIC EVIDENCE FOR K(-5 3) SCALING OF DENSITY POWER SPECTRA/

Experiments on the explosively driven compression and reexpansion of m etal cylinders are reported. Analysis of radiography data taken with a pulsed x-ray source reveals scale invariant density fluctuations. The marginal density spectra are consistent with a k(-8/3) power law, whe re k is wave number, corresponding to scalar density spectra varying a s k(-5/3). Remarkably, the same scaling behavior is observed for a var iety of metals with widely different mechanical properties. The relati on of these results to fully developed turbulence in both incompressib le fluids and compressible fluids with large density variations is dis cussed.