1 Answers
The Brinkman number is a dimensionless number related to heat conduction from a wall to a flowing viscous fluid, commonly used in polymer processing. It is named after the Dutch mathematician and physicist Henri Brinkman. There are several definitions; one is
B r = μ u 2 κ = P r E c {\displaystyle \mathrm {Br} ={\frac {\mu u^{2}}{\kappa }}=\mathrm {Pr} \,\mathrm {Ec} }
where
It is the ratio between heat produced by viscous dissipation and heat transported by molecular conduction. i.e., the ratio of viscous heat generation to external heating. The higher its value, the slower the conduction of heat produced by viscous dissipation and hence the larger the temperature rise.