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  2. Froude number - Wikipedia

    en.wikipedia.org/wiki/Froude_number

    The Froude number is based on the speed–length ratio which he defined as: [2] [3] = where u is the local flow velocity (in m/s), g is the local gravity field (in m/s 2), and L is a characteristic length (in m). The Froude number has some analogy with the Mach number.

  3. Open-channel flow - Wikipedia

    en.wikipedia.org/wiki/Open-channel_flow

    However, it is possible that the cross-sectional area can change with both time and space in the channel. If we start from the integral form of the continuity equation: = it is possible to decompose the volume integral into a cross-section and length, which leads to the form: = [()] Under the assumption of incompressible, 1D flow, this equation ...

  4. Standard step method - Wikipedia

    en.wikipedia.org/wiki/Standard_Step_Method

    The energy equation used for open channel flow computations is a simplification of the ... this depth corresponds to a Froude Number ... Equation 5. In order to use ...

  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. Hydraulic jumps in rectangular channels - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_Jumps_in...

    To help visualize the relationship of the upstream Froude number and the flow depth downstream of the hydraulic jump, it is helpful to plot y 2 /y 1 versus the upstream Froude Number, Fr 1. (Figure 8) The value of y 2 /y 1 is a ratio of depths that represent a dimensionless jump height; for example, if y 2 /y 1 = 2, then the jump doubles the ...

  7. Hydraulic jump - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_jump

    Amount upstream flow is supercritical (i.e., prejump Froude Number) Ratio of height after to height before jump Descriptive characteristics of jump Fraction of energy dissipated by jump [11] ≤ 1.0: 1.0: No jump; flow must be supercritical for jump to occur: none 1.0–1.7: 1.0–2.0: Standing or undulating wave < 5% 1.7–2.5: 2.0–3.1

  8. Reynolds number - Wikipedia

    en.wikipedia.org/wiki/Reynolds_number

    The Brezina equation. The Reynolds number can be defined for several different situations where a fluid is in relative motion to a surface. [n 1] These definitions generally include the fluid properties of density and viscosity, plus a velocity and a characteristic length or characteristic dimension (L in the above equation). This dimension is ...

  9. Outline of fluid dynamics - Wikipedia

    en.wikipedia.org/wiki/Outline_of_fluid_dynamics

    Manning equation – Estimate of velocity in open channel flows; Mild-slope equation – Physics phenomenon and formula; Morison equationEquation for force on an object in sea waves; Navier–Stokes equationsEquations describing the motion of viscous fluid substances