Jet mixing

Fig. 25. Flow patterns in jet mixed tanks where represents 2ones that are poody mixed (a) side entry and (b) axial.

The pressure drop through a jet mixing no22le is given by AP = 0.9pQ /... 

The mixture acts hke a liquid and the vapor condensation is dependent on jet mixing. This will require a different type of sparger design. 

Feed equipment as described for dry alum is suitable for soda ash. Dissolving of soda ash may be hastened by the use of warm dissolving water. Mechanieal or hydraulie jet mixing should be provided in the dissolver. Materials of construetion for piping and accessories should be iron, steel, rubber, and plastics. 

Abramovich was the first to study axisymmetric confined jets analytically. He suggested the method based on utilizing the equations of continuity and momentum conservation. He also assumed that the width of the layer of a jet mixing with a counterflow equals the width of a free jet with a velocity distribution according to Schlichting s formula ... 

T Hndcnko, B. G. 1966. About the calculation of turbulent jet mixing based on the principle of superimposing. In Studies of Heat and Mass Exchange in Production Processe, in qwp ment. Science and Technology, Minsk. 

Low-impulse air supply Inclined jets Mixed Mixed Local/general Radiative... 

Figure 5-36B. Illustration of jet mixing for biending of oiis by circulation within the tank. Oii from the top is drawn down and entrains the oii in the bottom of the tank through the eductor nozzle (jet). By permission, Ketema, Schutte and Koerting Div.

With injection mixers (Figures 10.52b,c), in which the one fluid is introduced into the flowing stream of the other through a concentric pipe or an annular array of jets, mixing will take place by entrainment and turbulent diffusion. Such devices should be used where one flow is much lower than the other, and will give a satisfactory blend in about 80 pipe diameters. The inclusion of baffles or other flow restrictions will reduce the mixing length required. 

For instance, if a high pressure, lighter-than-air gas is released in a downward direction, it will continue down until the jet-mixing phase is completed and it has been diluted by at least one order of magnitude. At that time, the buoyancy of the gas has little influence. Similarly, a heavier-than-air gas directed upward by pressure will continue traveling upward. The concept of... 

The release of pressurized gas to the atmosphere and its dispersion can be described in three stages jet mixing, momentum effects of wind or air currents, and natural diffusion. While the initial properties of the gas at the time of release (e.g. temperature, pressure, density) define the first stage, they have little influence on the second and third stage. The energy associated with the release of a pressurized gas creates a "jet mixing" effect that causes the gas to be diluted in air. Gas releases can rapidly form explosive clouds depending on the rate of release. 

Schultz and Matijevic (16) prepared nanoparticles of palladium sulfide (PdS) by the continuous double-jet mixing of PdCl2 or Na2(PdCl4) and Na2S. They found that the particle size was 20-30 nm in mean diameter obtained in acidic media (pH = 2-3), but 2-5 nm in alkaline media, probably due to the high equilibrium concentration of sulfide ions S2- by dissociation of H2S and HS in the alkaline media (pH = 10-12). A cationic surfactant, cetyl trimethyl ammonium bromide (CTAB), was found to be useful for stabilizing the small particles prepared in alkaline media. 

Goldberg, P. M. and Essenhigh, R. H. (1978). Coal combustion in a jet-mix stirred reactor. Proc 1 7th Inter Symposium on Combustion, The Combustion Institute, p. 145-154. 

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