Modifying the Rosin Rammler spread parameter for the atomizer models

In Fluent 6.1, by default, the spread parameter for Rosin Rammler distribution is 4.0 for effervescent atomizer, and 3.5 for the other atomizers. Is it possible to change this parameter?
You can alter this spread parameter for all the atomizers but effervescent atomizer by typing:

(rpsetvar 'dpm/atomizer-spread-param 3.9)

in the Text User Interface. For effervescent atomizer, the spread parameter is hard wired, and can not be changed.

This rpvar command will work for effervescent atomizer in Fluent 6.2.

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