fluid mechanics?

. Ρ the density of liquids flowing through a pipe of diameter D with an average speed V. Put instead of the first principles of a relationship between the shear stress τ0 between the fluid and tube wall and the loss per unit length i. He also receives a link between resistance and coefficient τ0 ƒ Darcy formula. How does the fluid shear stress varies across the pipe?

* For Please see the following links: http://en.wikipedia.org/wiki/Navier-Stokes_equations http://en.wikipedia.org/wiki/Shear_stress http://www.efunda.com/formulae/fluids/calc_pipe_friction . http://www.fsl.orst.edu/geowater/FX3/help/8_Hydraulic_Reference/Darcy_Friction_Factor.htm http://en.wikipedia.org/wiki/Reynolds_number http://en.wikipedia.org/wiki/Darcy_friction_factor cfm http://biosystems.okstate.edu/darcy/DarcyWeisbach/MoodyDiagram.htm http://css.engineering.uiowa.edu/ ~ fluids / lab-documents / DTS / DTS 20Lab2/lab2.pdf http://% www. Lmnoeng.com / moody.htm