Displacement thickness of boundary layer

Displacement thickness of boundary layer 673, 677 Distillation columns, mass transfer 576 Distributors for water cooling towers 762 Ditius-Boelter equation 417 Di ttos, F. W. 417.563... 

It appears that our measurement follows the Smith model. But it is noted that the Reynolds number of our data for low Gortler parameter is considerably small. Then, it seems that the Blasius flow no longer holds good for those data. In connection with this problem Ragab and Nayfeh computed the neutral stability curves taking into account of the effect of displacement thickness of boundary layer. According to their results the curves approach to that of the Smith model departing from that of modified Smith model at low wave number when R becomes small. 

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