,2 2 

 u' u 



Microscale of the turbulence, A = 



8u ' ^ ^ 



V Kinematic viscosity of the fluid 



p Mass density of the fluid 



p (d ) Spatial correlation coefficient of two axial velocity 



fluctuations at points A and B, p.„(d ) = u'u' 

 ^ AB r A B 



Shear stress at the wall 



"A^/ 



,2 



Axisyminetric momentum area, Q, = | (1- rr— I— r dr 



