The behavior of thek−&egr; turbulence model at a turbulent/nonturbulent interface is examined to determine the turbulent diffusion coefficients &sgr;kand &sgr;&egr;. The analysis leads to a dilemma caused by the modeling of the generation term in thekand &egr; equations. Based on limiting values of &sgr;kand &sgr;&egr;derived from this analysis, a revised form of the low−Reynolds−number incompressiblek−&egr; turbulence model is presented which incorporates a new set of model constants, a linear form of the near wall dissipation term in thekequation, and deletion of a nonphysical term in the &egr; equation. The revised model is applied to fully developed flow in a channel and found to give better agreement with experiment than the original form of the model developed by Jones and Launder.