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When this parameter is defined to a non-zero value, the kinematic viscosity 
used in the stress tensor corresponds to a uniform 
coefficient over the disk (from the alpha-disk formalism of [Shakura & Syunyaev 1973->http://adsabs.harvard.edu/abs/1973A%26A....24..337S]) equal to this parameter. Its use is mutually exclusive with the [
used in the stress tensor corresponds to a uniform coefficient over the disk (from the alpha-disk formalism of [Shakura & Syunyaev 1973->http://adsabs.harvard.edu/abs/1973A%26A....24..337S]) equal to this parameter. Its use is mutually exclusive with the [Viscosity->58] parameter.
In FARGO, the kinematic viscosity is evaluated as follows:
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