Thermal Blooming in Viscous and Thermally Conducting Fluids.
Abstract
The problem of thermal blooming of a laser beam in viscous and thermally conducting fluids is treated by means of the model discussed NRL Report 7213. (In that report blooming was treated for an ideal gas only). It is shown that viscous effects are small, as should be expected. The longtime behavior of the density in the presence of thermal conductivity is discussed at length. The cases of beam diameters of 0.5 and 1.0 cm with Gaussian intensity profiles are treated. The effect of thermal conduction in these cases is small, but in the direction of reducing the thermal blooming. For smaller diameter beams, it is shown that conductive effects are more pronounced. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 21, 1972
- Accession Number
- AD0748994
Entities
People
- J. N. Hayes
Organizations
- United States Naval Research Laboratory