A Scale Adaptive Turbulence Model Based on the k Equation and Recalibrated Reynolds Stress Constitutive Relation

Abstract

An algebraic relationship between turbulent dissipation rate and von Karman length are used to dismiss the transport equation of turbulent dissipation rate in standard k−خµ (SKE) turbulence model. Meanwhile, a recalibrated Bradshaw's assumption is built based on the data from a boundary layer flow of turbulent flat plate simulated by direct numerical simulation (DNS). The JL model is reformed to a oneequation model which only depends on the turbulent energy, so the new model can also be called kineticenergy dependent only (KDO) turbulence model. As the KDO model is using the von Karman length scale, it can automatically adjust to fit the resolved structures of the local flow. Results will be shown for the boundary layer flow on a turbulent flat plate, and the external flows of an NACA4412 airfoil, an ONERAM6 wing, a three dimension delta wing, and an NACA0012 airfoil at deep stall.