Single-phase impinging streams

In addition, the method of impinging streams can also be used for systems of single phase, such as gas-gas and liquid-liquid impinging streams etc. In fact, single phase impinging streams have great value for practical application in mixing, gas combustion, etc. 

The discussions in this chapter relate to single phase impinging streams, the behavior of which may reflect part of those of multiphase impinging streams. Taking into account the similarities of liquid with gas, the discussions will also involve impinging streams of liquid alone while the differences between gas- and liquid-continuous impinging streams will be described in detail in the chapters of Part II. 

It is clear that such significant deflection as that shown in Fig. 1.1 must be related to the properties of the liquid employed. In comparison with liquid, both the density and viscosity of a gas are much smaller, so that such a strong deflection could not be observed with gas jets. However, in principle, it is possible that such deflection phenomena could occur in gaseous single-phase impinging streams, but the degree of deflection may differ greatly from that of liquor ones. 

The pressure drop for single phase flow [AP in Eq. (5.13)] can be calculated from the following correlations derived for impinging streams with cylindrical impingement zones for H/D varying from 0.25 to 1.125 (Elperin et al., 1968) ... 

Meltser, V.L. and Pisarik, N.K. 1980. Interphase heat transfer in impinging single and two-phase streams. Proceedings of the XI All Russian Conference on Heat and Mass Transfer, 6(1) 132-135 (in Russian). 

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