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This paper summarizes the known physics of turbulent jets observed inlaboratory experiments. The formula, which gives the power released inturbulence describes the concentration of turbulence/relativistic particles ineach point of the astrophysical jets. The same expression is also used toanalyze the power released in turbulence in the case of pipe and non Newtonianfluids. Through an integral operation it is possible to deduce the intensity ofsynchrotron radiation for a profile perpendicular or not to a straight jet, a2D map for a perpendicular, randomly oriented straight jet as well as a 2D mapof complex trajectories such as NCC4061 and 3C31. Presented here is asimulation of the spectral index in brightness of 3C273 as well as a 2D map ofthe degree of linear polarization. The Sobel operator is applied to thetheoretical 2D maps of straight perpendicular jets.

A turbulent model for the surface brightness of extragalactic jets