Abstract: | Using different two‐phase systems, a laboratory flotation column was operated over a wide range of bubble size from 250 to 1100 µm. The drift flux analysis for the tests was used to obtain a new correlation to relate the characteristic exponent m in the drift flux equation jgf = Utαg(1 — αg)m, to bubble Reynolds number, where jgf is the drift flux, Ut is the terminal velocity of an individual bubble, αg is the gas volume fraction, and m is an exponent that depends on flow conditions. m = 20.26 + 1.89 Reb/4.38 + Reb. |