Basic principles of impinging streams

Elperin and Tamir considered that, in impinging streams with gas as the continuous phase, transfer between phases is enhanced by the factors below  

It can be seen that impingement between the streams shown in Fig. 1 is of a soft nature. As stated above, its flow configuration and impingement action are totally different from the impinging jet impacting on a fixed wall surface, which is a rigid impingement. 

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