User:NebY/formulae

For Orifice plate #Application

$$q_m = \frac{C}{\sqrt{1-\beta^4}}\;\epsilon\;\frac{\pi}{4}\;d^2\;\sqrt{2\;\Delta p\;\rho_1}$$

$$\epsilon = 1-(0.351+0.256\beta^4+0.93\beta^8)\bigg[1-\bigg(\frac{p_2}{p_1}\bigg)^\frac{1}{\kappa}\bigg]$$

$$C = 0.5961+0.0261\beta^2-0.216\beta^8+0.000521\bigg(\frac{10^6\beta}{Re_D}\bigg)^{0.7}+(0.043+0.080e^{-10{L_1}}-0.123e^{-7{L_1}})(1-0.11A)\frac{\beta^4}{1-\beta^4}-0.031(M'_2-0.8{M'_2}^{1.1})\beta^{1.3}$$ unless D < 71.2mm in which case this further term must be added to C: $$+0.011(0.75-\beta)\bigg(2.8-\frac{D}{25.4}\bigg)$$