Experimental study of the dynamics of an air-dust jet

Scaling of the gas phase in particle-laden turbulent axisymmetric jets

“…With this, they were able to collapse the measurements reported in Laats (1966) as illustrated in Fig. 1 (dots).…”

“…An inspection of these measurements reveals that power-law equations (8) and (9) 200 (e.g. Tsuji et al, 1988;Hishida et al, 1985), we find that Laats (1966).…”

“…Previously published experimental work (e.g. Laats, 1966;Laats and Frishman, 1970;Elghobashi et al, 1984;Hardalupas et al, 1989) find that as / o increases, the centreline velocity decay rate, K 1 , and the half width spreading rate, K 2 are both reduced.…”

“…However, the advantages of the powerlaw scaling is it is applicable (where n = 0, 1/2 or 1) for the full range of St o and gives a slightly better correlation (e.g. see above, Laats (1966) and Laats and Frishman (1970), St o = 18, where R 2 xu ¼ 0:978 and 0.964 for power-law and exponential scaling, respectively). Moreover, the power-law seems to have a physical basis, especially in the regime St o J 200, which corresponds to the scaling of a variable density jet (see Chen and Rodi, 1980).…”