  The time relaxation model, which is family of high accuracy turbulence
models, has proven to be effective in regularization of Navier Stokes
Equations. The model belongs to the class of Large Eddy Simulation models, and
is derived by adding a linear time regularization term $\chi u^{\star}$ to the
Navier Stokes Equations. The time relaxation operator truncates small solution
scales by injecting an extra dissipation to a simulation, without altering
appreciably the solution's large scales. Herein to evaluate the effect of the
time regularization term on a simulation, the rate of energy dissipation of the
model in body force driven turbulence is studied. Our result, which agrees with
Kolmogorov's conventional turbulence theory, is also consistent with the rate
proven for the NSE. Moreover, employing the model requires a choice of the
coefficient $\chi$. It is known that the model's simulation is sensitive to the
parameter. The analysis motivates a range of possible values for the
coefficient $\chi$ in $3d$ turbulent flows away from walls.
