Washington had "hypothetical plots" for worst-case plume dispersal within hours of the start of the crisis, a senior official said Sunday.
In this case, the plume samples all the relevant scales of heterogeneity and the spreading of the solute reaches its maximum.
Data analysis confirms that the electron density of the stagnation layer evolves over a longer timescale than in the single plume case.
In the Weak Plume case, 3D results are consistent with the predictions of integral models in the jet and plume regions, with an entrainment coefficient around 0.10 in the plume region.
In the Strong Plume case, the self-similarity assumption is less appropriate and the entrainment coefficient in the plume region is more unstable, with an average value of 0.24.
In this case, tradeoffs between plume velocity and dispersivity cause shifts in the position and mass of solute relative to the electrodes that result in equivalent values of subsurface apparent resistivity.
The numerical simulations are validated in the case of gas plume after the Becker et al. data (Becker, S., Sokolichin, A., & Eigenberg, G. (1994) Gas liquid flow in bubble columns and loop reactors: Part II.
To fill these data gaps we calculate the missing value using a linear interpolation between Hawaiian-like values (8,700 kg s−1 and 290 °C) representing the 'strong plume' case and values that are typical for a weak plume (500 kg s−1 and 150 °C).
This condition is most likely the case in the plume of Enceladus, where the dust density is the highest.
Neither picture is correct, at least in the case of a plume described in the first peer-reviewed publication of oil-spill observations.
