Calculation of Friction Factor by Colebrook-White,Blasius,Plandtl-Karman & Moody Diagram.

Keyword

Friction Factor,Moody Diagram,Colebrook-White equation,Blasius,Plandtl-Karman,Laminar flow,Turbulent flow,Nikuradse.

Reference

・『Excelで解く配管とポンプの流れ』(板東修).

Remarks

・Colebrook-White equation:1/λ^0.5=-2*Log10(ε/d/3.71+2.51/Re/λ^0.5).
・Plandtl-Karman equation:1/λ^0.5=2.0*Log10(Re*λ^0.5)-0.8.
・Laminar Flow:λ=64/Re.
・Blasius equation:λ=0.3164/Re^0.25.
・Nikuradse equation(Pipe with Rough Wall):1/λ^0.5=1.14-2.0*Log10(ε/d).※Round bullet does not appear in the Moody diagram.

History

・2014/08/18:layout change.
・2009/03/30:Moved from www.am-consulting.co.jp to here.