5 papers
Drag penalty during relaminarization and Kelvin-Helmholtz-promoted retransition in an accelerating turbulent boundary layer over initially drag-reducing riblets
Benjamin Savino, Wen Wu
Direct numerical simulations of an accelerating turbulent boundary layer (TBL) over a smooth wall and a wall fully covered with streamwise-aligned riblets are performed to investig…
Improving boundary-layer separation prediction by an IDDES turbulence model using a pressure-gradient sensor
Benjamin S. Savino, Kevin Patrick Griffin, Bumseok Lee +3
This work extends a pressure-gradient sensor for boundary-layer separation originally developed for the shear-stress transport Reynolds-averaged Navier-Stokes (RANS) model (…
Attached Decelerating Turbulent Boundary Layers over Riblets
Benjamin S. Savino, Amirreza Rouhi, Wen Wu
Turbulent boundary layers over riblets subjected to adverse pressure gradients (APGs) are investigated by direct numerical simulation. Multiple APG strengths and riblet sizes are e…
Separation of a Laminar Boundary Layer Subjected to Pressure Gradients with Spanwise Variations
John Marshall Cooper, Benjamin S. Savino, Benjamin Kellum Cooper +1
The characteristics of three-dimensional laminar separation bubbles (LSBs), compared with their quasi-two-dimensional counterparts, are studied using direct numerical simulation. A…
Pressure-Induced Separation of a Laminar Boundary Layer over a Partially-Slip Wall
Benjamin Kellum Cooper, Benjamin S. Savino, John Marshall Cooper +2
The characteristics of pressure-induced laminar separation bubbles (LSBs) over a partially-slip wall, compared with that over a canonical no-slip wall, are studied using direct num…