The flows, inside and outside, were analytically obtained, using
matched asymptotic expansions, under various circumstances like reaction
at the drop surface in a homogeneous or inhomogeneous surrounding,
uniform internal heat generation, time-varying effective gravity,
and g-jitter. This permitted to establish the generalization to finite
Reynolds number of the classic, any text book, and results due to J. S.
Hadamard (1911), W. Rybczynski (1911), and B. G. Levich (1962). A
curious result was that also superdrag beyond the Stokes–Hadamard–
Rybczynski law could occur to the drop depending on its activation
mechanisms. Manuel also explored the role of the simultaneous action