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An analysis and experiments were carried out to study the spreading and centerline property decay rates of underexpanded supersonic jets. The main purpose was to determine a suitable set of normalization parameters that would account for the initial expansion process and allow for a comparison of...
Exact relationship is developed that connects the vibrational relaxation number, Z v DSMC , Z v DSMC , used in the direct simulation Monte Carlo method and that employed in continuum simulations. An approximate expression for Z v DSMC Z v DSMC is also derived that is cost-effective and applicable...
We study by direct numerical simulations the effects of Schmidt number ( Sc ) on passive scalars mixed by forced isotropic and homogeneous turbulence. The scalar field is maintained statistically stationary by a uniform mean gradient. We consider the scaling of spectra, structure functions, local...