Abstract
The temporal intensity autocorrelation function of diffusing wave spectroscopy (DWS) in electrorheological (ER) fluids is obtained with the molecular dynamics (MD) simulation method. The photons are introduced to the pattern of temporal microstructure and the light scattering procedure is regarded as Mie scattering. The fluctuations of the light intensity of different photon paths are calculated from the phase changes generated by the motion of the particles. Analyses of the decay of the time-dependent autocorrelation function provide information about the microscopic dynamics including the interactions between particles under high electric field. The results of this MD simulation method are consistent with that from CCD based DWS experiment and thus enable us to interpret our former experimental results.
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