MATHEMATICAL SIMULATION OF TURBULENT MIXING IN A STATIC MIXER

Results of investigation of the turbulent mixing of liquid fl ows in a static mixer are presented. It was established that, in the case where liquids infl ow into such a mixer with equal velocities, their movement in the radial direction in the mixer is absent. In this case, the main mechanism providing the mixing of liquid fl ows in a static mixer is their molecular diff usion, and, therefore, the intensity of mixing of the liquid fl ows is low. An increase in the diff erence between the velocities of the liquid fl ows at the inlet of a static mixer leads to their turbulization, with the result that the mixing of the liquids is substantially intensifi ed, and a homogenous distribution of their mass fractions in the mixture is attained at a smaller distance from the inlet cross section of the mixer. When the diff erence between the velocities of the liquid fl ows at the inlet of a static mixer is large, at the center of the mixer channel there arises a recirculation fl ow zone in which the liquids are mixed intensively
   
Author:  O. V. Matvienko, V. A. Romashchenko
Keywords:  mixing, turbulence, static mixer, diff usion, gasoline, oxygenate, computational fl ow dynamics
Page:  1464