  Clipping refers to adding 1 line of code A=min{A,B} to force the variable A
to stay below a present bound B. Phenomenological clipping also occurs in
turbulence models to correct for over dissipation caused by the action of eddy
viscosity terms in regions of small scales. Herein we analyze eddy viscosity
model energy dissipation rates with 2 phenomenological clipping strategies.
Since the true Reynolds stresses are O(d^2) (d= wall normal distance) in the
near wall region, the first is to force this near wall behavior in the eddy
viscosity by clipping the turbulent viscosity. The second is Escudier's early
proposal to clip the turbulence length scale, reducing too large values in the
interior of the flow. Analyzing respectively shear flow turbulence and
turbulence in a box (i.e., periodic boundary conditions), we show that both
clipping strategies do prevent aggregate over dissipation of model solutions.
