Formula Symbols - D

Written by Jerry Ratzlaff on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

SymbolGreek SymbolDefinitionUSMetric
\(C_f\) or \(f_D\) - Darcy friction factor dimensionless number dimensionless number
\(Da\) - Darcy's law - -
\(Da\) - Darcy number dimensionless number dimensionless number
\(DW\) - Darcy-Weisbach equation dimensionless number dimensionless number
\(De\) - Deborah number dimensionless number dimensionless number
\(d \) - deflection - -
\(\mu \) mu degree of saturation - -
\( \rho \) rho density \(lbm/ft^3\) \(kg/m^3\)
\(z\) - depth \(ft\) \(m\)
\( d\) - diameter \(ft\) \(m\)
\( \phi\) phi diameter \(ft\) \(m\)
\(\Delta \) delta differential - -
\(D \) - diffusion coefficient - -
\(\alpha \) alpha diffusivity \(ft^2/hr\) \(m^2/s\)
\(a\) - dimension \(in\) \(m\)
\(b\) - dimension \(in\) \(m\)
\(K\) - dimensionless factor - -
\( d\) - displacement \(ft\) \(m\)
\(\delta \) delta displacement \(ft\) \(m\)
\( l\) - distance \(ft\) \(m\)
\( d\) - distance \(ft\) \(m\)
\( s\) - distance along cable \(ft\) \(m\)
\( a\) - distance to lowest cable point \(ft\) \(m\)
\(C_D\) - drag coefficient dimensionless number dimensionless number
\(F_D\) - drag force - -
\(Du\) - Dukhin number dimensionless number dimensionless number
\(q\) - dynamic pressure - -
\(Q\) - dynamic pressure - -
\(\mu \) mu dynamic viscosity \(lbf-sec/ft^2\) \(Pa\cdot s\)