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  2. Darcy friction factor formulae - Wikipedia

    en.wikipedia.org/wiki/Darcy_friction_factor_formulae

    The Blasius correlation is the simplest equation for computing the Darcy friction factor. Because the Blasius correlation has no term for pipe roughness, it is valid only to smooth pipes. However, the Blasius correlation is sometimes used in rough pipes because of its simplicity. The Blasius correlation is valid up to the Reynolds number 100000.

  3. Darcy–Weisbach equation - Wikipedia

    en.wikipedia.org/wiki/Darcy–Weisbach_equation

    If the value of the friction factor is 0.064, then the Darcy friction factor is plotted in the Moody diagram. Note that the nonzero digits in 0.064 are the numerator in the formula for the laminar Darcy friction factor: f D = ⁠ 64 / Re ⁠. If the value of the friction factor is 0.016, then the Fanning friction factor is plotted in the Moody ...

  4. List of dimensionless quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_dimensionless...

    Fanning friction factor: f: fluid mechanics (fraction of pressure losses due to friction in a pipe; 1/4th the Darcy friction factor) [13] Fourier number: Fo = heat transfer, mass transfer (ratio of diffusive rate versus storage rate) Froude number: Fr

  5. Dimensionless numbers in fluid mechanics - Wikipedia

    en.wikipedia.org/wiki/Dimensionless_numbers_in...

    Dimensionless numbers (or characteristic numbers) have an important role in analyzing the behavior of fluids and their flow as well as in other transport phenomena. [1] They include the Reynolds and the Mach numbers, which describe as ratios the relative magnitude of fluid and physical system characteristics, such as density, viscosity, speed of sound, and flow speed.

  6. Moody chart - Wikipedia

    en.wikipedia.org/wiki/Moody_chart

    In engineering, the Moody chart or Moody diagram (also Stanton diagram) is a graph in non-dimensional form that relates the Darcy–Weisbach friction factor f D, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe. It can be used to predict pressure drop or flow rate down such a pipe.

  7. Friction loss - Wikipedia

    en.wikipedia.org/wiki/Friction_loss

    The three values chosen for friction loss correspond to, in US units inch water column per 100 feet, 0.01, .03, and 0.1. Note that, in approximation, for a given value of flow volume, a step up in duct size (say from 100mm to 120mm) will reduce the friction loss by a factor of 3.

  8. Category:Equations of fluid dynamics - Wikipedia

    en.wikipedia.org/wiki/Category:Equations_of...

    Darcy friction factor formulae; Darcy–Weisbach equation; Davey–Stewartson equation; Degasperis–Procesi equation; Derivation of the Navier–Stokes equations;

  9. Darcy friction factor - Wikipedia

    en.wikipedia.org/?title=Darcy_friction_factor&...

    Language links are at the top of the page across from the title.