Condensation of ablation plumes in the irradiation of metals by high-intensity nanosecond laser pulses at atmospheric pressure

Dynamics of thermophysical parameters of silver ablation jets at atmospheric pressure

“…1, the solid curve corresponds to the substitution of the set initial data for silver ablative jet in (1). However, as it was noted at [12], this approximation gives a highly inflated jet size for lead ablative jet in comparison with experimental data [13] (which is not surprising, given the orientation of this approximation to the expansion of jet in a vacuum).…”

“…The better effect can be obtained by using the spherically symmetric approximation based on a modification [12] of the Taylor -Sedov model [15], which was originally used to describe the movement of the front of an explosive shock wave in buffer gases. The Taylor -Sedov approximation considers the case of propagation of a spherical shock wave in an ideal gas with a constant heat capacity.…”

“…This requires a corresponding transformation of the Taylor -Sedov relation to the form (2), where the movement of the shock wave front is determined by two-dimensional parameters: the explosion energy E and the initial density of the buffer gas ρ g [12]:…”

“…In paper [12], it is proposed the model the spatial-temporal distributions of gas density inside the jet ρ and pressure P for the case of atmospheric gases. This model uses the degree of parabola up to 8 (provides a more real size of the transition zone from internal to external parameters) and obtain additional parameters that provide correct boundary conditions (density and pressure of atmospheric gases at the external boundary of the jet).…”