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  2. Darcy–Weisbach equation - Wikipedia

    en.wikipedia.org/wiki/DarcyWeisbach_equation

    μ is the dynamic viscosity of the fluid (Pa·s = N·s/m 2 = kg/(m·s)); Q is the volumetric flow rate, used here to measure flow instead of mean velocity according to Q = ⁠ π / 4 ⁠ D c 2 <v> (m 3 /s). Note that this laminar form of Darcy–Weisbach is equivalent to the Hagen–Poiseuille equation, which is analytically derived from the ...

  3. Darcy friction factor formulae - Wikipedia

    en.wikipedia.org/wiki/Darcy_friction_factor_formulae

    In fluid dynamics, the Darcy friction factor formulae are equations that allow the calculation of the Darcy friction factor, a dimensionless quantity used in the Darcy–Weisbach equation, for the description of friction losses in pipe flow as well as open-channel flow.

  4. Darcy's law - Wikipedia

    en.wikipedia.org/wiki/Darcy's_law

    Diagram showing definitions and directions for Darcy's law. A is the cross sectional area (m 2) of the cylinder. Q is the flow rate (m 3 /s) of the fluid flowing through the area A. The flux of fluid through A is q = Q/A. L is the length of the cylinder. Δp = p outlet - p inlet = p b - p a.

  5. Moody chart - Wikipedia

    en.wikipedia.org/wiki/Moody_chart

    It adapts the work of Hunter Rouse [2] but uses the more practical choice of coordinates employed by R. J. S. Pigott, [3] whose work was based upon an analysis of some 10,000 experiments from various sources. [4] Measurements of fluid flow in artificially roughened pipes by J. Nikuradse [5] were at the time too recent to include in Pigott's chart.

  6. ΔP - Wikipedia

    en.wikipedia.org/wiki/ΔP

    1.2.2 Static compliance (C stat) 2 See also. 3 References. 4 External links. ... The Darcy–Weisbach equation can also be written in terms of pressure loss:

  7. Pipe network analysis - Wikipedia

    en.wikipedia.org/wiki/Pipe_network_analysis

    Given a starting node, we work our way around the loop in a clockwise fashion, as illustrated by Loop 1. We add up the head losses according to the Darcy–Weisbach equation for each pipe if Q is in the same direction as our loop like Q1, and subtract the head loss if the flow is in the reverse direction, like Q4.

  8. Fanno flow - Wikipedia

    en.wikipedia.org/wiki/Fanno_flow

    The initial conditions exist at point 1. Point 2 exists at the nozzle throat, where M = 1. Point 3 labels the transition from isentropic to Fanno flow. Points 4 and 5 give the pre- and post-shock wave conditions, and point E is the exit from the duct. Figure 4 The H-S diagram is depicted for the conditions of Figure 3. Entropy is constant for ...

  9. Darcy - Wikipedia

    en.wikipedia.org/wiki/Darcy

    2.1 Men. 2.2 Women. 3 Fictional characters. ... Darcy–Weisbach equation used in hydraulics for calculation of the head loss due to friction; ... D'Arcy Carden (born ...

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