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         u21            u22 y1 + z1 + —— = y2 + z2 + —— + DH1-2 [m]          2·g            2·gy    = Pressure  Head      [m] z    = Potential Head   …

Bernoulli’s equation, expressed in head [m] Read more »

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Q = Cv·Cc·A0·²Ö(2·g·h) [m3/s]  Cv = Velocity coefficient (0,97-0,99)   [1] Cc = Contraction coefficient (0,61-0,66)[1] A0 = Wetted  Area                       [m2]  h =  Pressure just before orifice       [m] …

Discharge small orifice Read more »

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$latex LARGE Q=frac{2}{3}cdot bcdot sqrt[2]{2gcdot left({h_{2}}^{frac{3}{2}}-{h_{1}}^{frac{3}{2}} right )}$      b  = Width orifice              [m] g  = Earths gravity= 9,81       [m/s2] h1 = Pressure at top orifice    [m] h2 = Pressure at bottom …

Discharge large orifice Read more »

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        m u =  —             [m2/s]         rm = Absolute viscosity    [kg/ms] m  water 20°C  = 1,00·10-3 [kg/ms] r = Density of liquid     [kg/m3] r fresh water     = 1000  [kg/m3] …

Kinematic viscosity Read more »

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            u2H = y + z + —  [m]           2·g y   = Pressure Head  [m] z   = Potential Head [m] u2 —  = Velocity Head   [m] 2·g u   = …

Total Head Read more »

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F = m · g  [N] m = weight           [Kg] g = earths gravity   [m/s2]

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