CB Comments: redphi and nredphi are used to define
	     special conditions for the mechanical Eulerian element
	     materials. If the element number is greater than
	     nredphi, it will be assigned the mechanical material
	     properties of material number redphi for mechanical 
             calculations.  Note that the actual color number (material
             number) of the Eulerian element is not overwritten, so 
             you will not see the boundary layer material redphi in plots
             of material colors.

	     Use of redphi and nredphi overrides other methods used
	     to assign mechanical properties. [Example of use is to
	     define a basal boundary layer in sandbox type
	     experiments such that the boundary layer is redefined
	     every timestep according to the Eulerian grid and
	     therefore in a manner that overrides material advection
	     and regridding from the Lagrangian grid.]
	     
	     nredphi should be used with care, remember that it
	     assigns one mechanical material property (that of
	     redphi) to the Eulerian elements. The effect of strain
	     dependent material properties should also be considered.
	     To avoid resetting element properties in this way, set
	     nredphi.gt.max number of Eulerian mechanical elements.