Rj. Haywood et al., TRANSIENT DEFORMATION AND EVAPORATION OF DROPLETS AT INTERMEDIATE REYNOLDS-NUMBERS, International journal of heat and mass transfer, 37(9), 1994, pp. 1401-1409
The early life histories of isolated n-heptane droplets injected into
1000 K air at 1 and 10 atm with initial Reynolds and Weber numbers of
100 and 2, respectively, are reported. A numerical model is used to pr
edict the transient droplet shape, and the velocity, pressure, tempera
ture and concentration fields in both phases. Initially spherical drop
lets show strongly damped oscillations at frequencies within 25% of th
e theoretical natural frequency of Lamb (1932). Circulation within the
droplets is responsible for the observed strong damping and promotes
the formation of prolate shapes for surfactant-free droplets. The comp
uted heat and mass transfer rates are well predicted by existing quasi
-steady correlations.