Friction Factor Calculator by Mood Diagram This friction factor calculator acts like an on-line Moody diagram. One of the advantages of this program over the Moody diagram is that graphical interpolations are not needed; each friction factor is computed directly from the generating formula due to Colebrook (J. Inst. Civ. Eng. Lond., v.11, 1938-1939, pp.133-156). In the calculator below, the Reynolds number, pipe roughness, and friction factor are denoted by Re, e, and f respectively. I've recently upgraded this calculator to include an output for the pressure drop per length of pipe. 이 계산기에 적용된 이론적 배경 First pick a system of units: Metric US Customary Next, pick a fluid: Air Nitrogen Carbon Dioxide Helium Water Gasoline Glycerin Next, enter the pipe diameter D: Next, enter the flow velocity: Finally, enter the type of pipe: Commercial Steel Stainless Steel Rivited Steel Rusted Steel Cast Iron Wrought Iron Galvanized Iron Brass Plastic Glass Concrete (Smoothed) Concrete (Rough) Smooth Pipe I find the flow to be in the regime with parameters: Re= e/D= f = |Dp|/L = , where Dp/L º is the pressure change per length of pipe, e º the roughness factor, and Re º Reynolds number.