# Two Equation Eddy Viscosity Models

Two equation turbulence models are perhaps the most commonly used in industrial flow applications.

Although there are many two equation models available, some of the more popular ones include:
• $k-\epsilon$ model, Renormalized Group (RNG) $k-\epsilon$ model, Realizable $k-\epsilon$ model,
• $k-\omega$ model, Shear Stress Transport (SST) model.