C,15 • THE PROCESS OF DECAY 



0.5 1.0 1.5 



(X - 0.06)-^ m-1 



2.0 



2.5 



Fig. C,15e. Top, decay of turbulence behind two grids Mi and Mj with mesh widths 

 5 cm and 1 cm, respectively (Ms downstream from Mi), x is the distance behmdjhe 

 second grid Mj, Xi is the distance between the grids, U is the mean velocity, and u^ is 

 the mean square turbulence.JAfter Tsuji and Hama [52].) Data show departure 



from the simple law of decay u^ ~ t~'^. 



Bottom, same data as presented in Fig. C,15e, upper, replotted to show conformity 

 with Eq. 14-7 (after Tsuji and Hama [62]). 



{ 235 > 



