Fig. 1: Reynolds number (Re) contours.
From: Aeolian sediment transport on Io from lava–frost interactions
a For the atmospheric densities (ρgas) representative of Io’s ambient atmosphere, with the hatching and the dashed line indicating parts of the parameter space occupied by specific geographical regions. The floating powers of 10 are labels for the contours. The constant temperature (T) and wind velocity (u) used for this calculation are denoted. Calculations in a, b and c are a function of the atmospheric viscous sublayer height δi which is not known for Io. b For the modeled sublimating vapor at the lava-SO2 frost margins, as a function of the outflowing vapor density (ρgas). Note that in b, the calculated Re is a function of temperature, as the outflowing vapor density is dependent on temperature. The outgassing velocity, uT, that Re is evaluated at in b and c is also a function of temperature. The contour for the critical Re value is denoted by the thick solid line. c, The same results shown in b, explicitly showing the dependence on SO2 sublimation temperature.
