Blake Number
Blake number, abbreviated as Bl, a dimensionless number, is proportional to inertial force and viscous force and is used in momentum transfer and flow through beds of solids.
Blake Number formula |
||
\(\large{ B = \frac{ v \; \rho \; d_h }{ \mu \; \left( 1\;-\; \epsilon \right) } }\) | ||
Symbol | English | Metric |
\(\large{ Bl }\) = Blake number | \(\large{dimensionless}\) | |
\(\large{ \rho }\) (Greek symbol rho) = density of fluid | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) |
\(\large{ \mu }\) (Greek symbol mu) = dynamic viscosity of fluid | \(\large{\frac{lbf-sec}{ft^2}}\) | \(\large{ Pa-s }\) |
\(\large{ d_h }\) = hydraulic diameter | \(\large{ ft }\) | \(\large{ m }\) |
\(\large{ v }\) = velocity of fluid | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) |
\(\large{ \epsilon }\) (Greek symbol epsilon) = void fraction | \(\large{dimensionless}\) |
Tags: Force Equations