The LORD is my shepherd, I shall not be in want. He makes me lie down in green pastures, He leads me beside quiet waters, He restores my soul.He guides me in paths of righteousness for His name's sake. Even though I walk through the valley of the shadow of death, I will fear no evil, for You are with me; Your rod and Your staff, they comfort me. You prepare a table before me in the presence of my enemies. You anoint my head with oil;my cup overflows.Surely goodness and love will follow me all the days of my life, and I will dwell in the house of the LORD forever.- Psalm 23
Saturday, June 21, 2008

Whoever said Science people were square headed.

The moody chart (my Emphasis) relates the Friction factor for fully developed pipe flow to the Reynolds number and relative roughness of a circular pipe. The relative roughness being \epsilon \over D, the ratio of the mean height of roughness of the pipe to the pipe diameter.

The Moody Chart can be divided into 2 regimes of flow: laminar and turbulent.

For the laminar flow regime, the Darcy-Weisbach friction factor, f=64/Re, and the Fanning friction factor, f=16/Re

For the turbulent flow regime, the relationship between the friction factor and the Reynolds number is more complex and is governed by the Colebrook equation.

In 1939, C.F. Colebrook combined all the data collected in the implicit Colebrook equation:


{1 \over \sqrt{\mathit{f}}}= -2.0 \log \left( {\epsilon \div D \over 3.7} + {2.51 \over {Re \sqrt{\mathit{f} } } } \right) , \text{turbulent flow}


Oh How i love PUO. *disgust*



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