Abstract
Considering the lateral variation of eddy viscosity, a plane turbulent jet of an incompressible fluid is calculated. Approximating eddy viscosity as proportional to the lateral turbulence intensity and using simple functions like (u/u0)n or (1+ αηm)-1 to express distributions of measured turbulence intensity, fair agreement is obtained between the calculated and some experimental results of the mean velocity distributions with constants such as n=0.3 or α=0.13 and m=4.
In addition, a simple empirical formula for mean velocity distribution is given, which is analogous to the formula derived for a far wake flow and is corrected in the exponent to fit the measured profile in the central region of the jet. A numerical table of u/u0 is presented comparing the known analytical solutions, empirical formulas and the present results.
