09-August/Agosto-2009

Colebrook

 By / por: Froiln Andrs Morales Sanabria <froilan1986@hotmail.com>
           http://www.ticalc.org/archives/files/authors/95/9551.html

ENGLISH: This function solves the Colebrook equation for the DarcyWeisbach friction factor using Newton-Raphson method with Haaland as initial guess. TI-89, TI-92, TI-92 Plus, Voyage 200 and TI-89 Titanium compatible.
ESPAOL: Esta funcion resuelve la ecuacion de Colebrook para el factor de friccion de DarcyWeisbach usando el metodo de Newton-Raphson con Haaland como aproximacion inicial. Compatible con TI-89, TI-92, TI-92 Plus, Voyage 200 y TI-89 Titanium.
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Darcy-Weisbach equation

        L V^2
h_f = f*-*---
        D 2*g

f  = f(Re,e/D)

Re = V*D/u

V  = (4*Q)/(pi*D^2)
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  Losses in Pipe Flows / Prdidas en Flujos por Tubera
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Links / Enlaces

  Darcy friction factor formulae
   http://en.wikipedia.org/wiki/Darcy_friction_factor_formulae

  Newton's method
   http://en.wikipedia.org/wiki/Newton%27s_method
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