# Formula Symbols - W

on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

## Formula Symbols

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## W

SymbolGreek SymbolDefinitionEnglishMetricSIValue
$$\frac{m_w}{m_z}$$ - W-to-Z mass ratio dimensionless constant $$0.881\;53\;(17)$$
$$W$$ - Wahl correction factor dimensionless -
$$f$$ - Wallis parameter dimensionless -
$$w$$ - water content dimensionless -
$$\rho_w$$ rho water density by temperature $$\large{\frac{lbm}{ft^3}}$$ $$\large{\frac{kg}{m^3}}$$ $$kg - m^{-3}$$ -
$$Q_w$$ - water flow rate $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$m^3 - s^{-1}$$ -
$$q$$ - water flow rate increment $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$m^3 - s^{-1}$$ -
$$Q_w$$ - water flow rate through a valve $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$m^3 - s^{-1}$$ -
$$Q_w$$ - water flow rate through an orfice $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$m^3 - s^{-1}$$ -
$$Q_w$$ - water flow rate through piping $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$ $$m^3 - s^{-1}$$ -
$$v$$ - water hammer flow velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$ -
$$\Delta v$$ - water hammer fluid velocity change $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$ -
$$g$$ - water hammer gravitational acceleration $$\large{\frac{ft}{sec^2}}$$ $$\large{\frac{m}{s^2}}$$ $$m - s^{-2}$$ -
$$p$$ - water hammer inlet pressure $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$p_{spf}$$ - water hammer maximum surge pressure for fluid $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$p_{spw}$$ - water hammer maximum surge pressure for water $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
- - water hammer maximum surge pressure head $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$p_{inc}$$ - water hammer pressure increase $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$\alpha$$ alpha water hammer pressure wave velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$  -
$$\gamma_f$$ gamma water hammer unit weight of fluid $$\large{\frac{lbm}{ft^3}}$$ $$\large{\frac{N}{m^3}}$$  $$N - m^{-3}$$ -
$$l$$ - water hammer upstream pipe length $$ft$$ $$m$$ $$m$$  -
$$t$$ - water hammer valve closing time $$sec$$ $$s$$ $$s$$  -
$$WHP$$, $$HP_w$$ - water horsepower $$\large{\frac{lbf-ft}{sec}}$$ $$\large{\frac{J}{s}}$$ $$J - s^{-1}$$   -
$$WkW$$ - water kilowatts - - - -
$$d$$ - water pipe sizing $$in$$ $$mm$$  $$mm$$ -
$$p_i$$ - water pressure loss through piping $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$WS$$ - water surface - - - -
$$p$$ - water vapor pressure $$\large{\frac{lbf}{in^2}}$$ $$Pa$$ $$kg- m^{-1}-s^{-2}$$ -
$$v_w$$ - water velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$ -
$$v_w$$ - water velocity through piping $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$ -
$$P$$ - watt (electric)  $$\large{\frac{lbf-ft}{sec}}$$ $$W$$  $$kg-m^2-s^{-3}$$ -
$$H$$ - wave height $$in$$ $$mm$$ $$mm$$  -
$$\lambda$$ lambda wavelength $$in$$ $$mm$$  $$mm$$ -
$$\lambda_l$$ lambda wavelength (longitudinal) $$ft$$ $$m$$  $$m$$ -
$$v_w$$ - wavelength velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$  -
$$\Psi$$ Psi wave function - - - -
$$\sigma^1$$ sigma wave number - - - -
$$\sigma$$ sigma wave vector - - - -
$$\lambda$$ lambda wave velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$m - s^{-1}$$  -
$$A_{web}$$ - web area in a steel beam equal to the depth x web thickness $$ft^2$$ or $$in^2$$ $$m^2$$ or $$mm^2$$ $$m^2$$ or $$mm^2$$  -
$$t_w$$ - web thickness $$in$$ $$mm$$  $$mm$$ -
$$We$$ - Weber number dimensionless -
$$G$$, $$\;P$$, $$\;W$$ - weight $$lbf$$ $$N$$  $$kg - m - s^{-2}$$  -
$$W_{\rho}$$ rho weight density $$\large{\frac{lbm}{ft^3}}$$ $$\large{\frac{kg}{m^3}}$$ $$kg - m^{-3}$$  -
$$W_a$$ - weight of air - - - -
$$W_b$$ - weight of body $$lbf$$ $$N$$  $$kg - m - s^{-2}$$ -
$$W_{rho}$$ rho weight density $$\large{\frac{lbf-in}{ft^3}}$$ $$\large{\frac{kg-mm}{m^3}}$$ $$kg - mm - m^{-3}$$ -
$$\gamma$$ gamma weight of fluid $$lbf$$ $$N$$   $$kg - m - s^{-2}$$ -
$$W$$ - weight force $$lbf$$ $$N$$   $$kg - m - s^{-2}$$ -
$$W_{im}$$ - weight of immersed body $$lbf$$ $$N$$   $$kg - m - s^{-2}$$ -
$$W_s$$ - weight of soil $$lbf$$ $$N$$   $$kg - m - s^{-2}$$ -
$$W_s$$ - weight of solid $$lbf$$ $$N$$   $$kg - m - s^{-2}$$ -
$$W_w$$ - weight of water $$lbf$$ $$N$$   $$kg - m - s^{-2}$$ -
$$\theta_w$$ theda Weinberg angle dimensionless constant  $$0.22290$$
$$Wi$$ - Weissenberg number dimensionless -
$$A$$ - weld current - -  - -
$$W$$ - weld size $$in$$ $$mm$$ $$mm$$  -
$$s$$ - weld speed $$\large{\frac{in}{min}}$$ $$\large{\frac{mm}{min}}$$  $$mm - min^{-1}$$ -
$$A_{throat}$$ - weld, area cross the throat of the weld $$ft^2$$ or $$in^2$$ $$m^2$$ or $$mm^2$$ $$m^2$$ or $$mm^2$$ -
$$\rho_{wb}$$ rho wet bulk density of soil $$\large{ \frac{lbm}{ft^3} }$$ $$\large{ \frac{kg}{m^3} }$$ $$kg - m^{-3}$$ -
$$P_w$$ - wetted perimeter $$ft$$ $$m$$  $$m$$ -
$$\zeta$$ zeta wet steam dryness fraction dimensionless -
$$h_t$$ - wet steam enthalpy $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
$$C_v$$ - wet steam flow coefficient dimensionless -
$$\upsilon$$ upsilon wet steam specific volume $$\large{\frac{ft^3}{lbm}}$$ $$\large{\frac{m^3}{kg}}$$ $$m^3 - kg^{-1}$$ -
$$M$$ - whole number - - - -
$$w$$ - width $$ft$$ $$m$$ $$m$$  -
$$b$$   width, often cross-section $$ft$$ or $$in$$ $$m$$ or $$mm$$  $$m$$ or $$mm$$ -
$$b_f$$ - width of the flange of a steel beam cross-section $$in$$ $$mm$$  $$mm$$ -
$$T_{wc}$$ - wind chill factor dimensionless -
$$E$$ - wind energy $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$  -
$$\alpha$$ alpha Womersley number dimensionless -
$$W$$ - work $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
$$W$$ - work done by gas $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
$$W$$ - work done on a system $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
$$W$$ - work-energy theorem $$\large{ \frac{ft^3}{sec} }$$ $$\large{ \frac{m^3}{s} }$$ $$m^3 - s^{-1}$$ -
$$\phi$$ phi work function - - - -
$$W$$ - work per unit mass $$lbf-ft$$ $$J$$ $$kg - m^2 - s^{-2}$$ -
Symbol Greek Symbol Definition English Metric   Value

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