Quantifying Model Form Uncertainty in RANS Simulation of Wing-Body Junction Flow

Understand

Wing-body junction flows occur when a boundary layer encounters an airfoil mounted on the surface.

• The corner flow near the trailing edge is challenging for the linear eddy viscosity Reynolds Averaged Navier-Stokes (RANS) models, due to the interaction of two perpendicular boundary layers which leads to highly anisotropic Reynolds stress at the near wall region.
• Recently, Xiao et al.
• proposed a physics-informed Bayesian framework to quantify and reduce the model-form uncertainties in RANS simulations by utilizing sparse observation data.