Direct numerical simulation of the flow around a wing section at moderate Reynolds numbers etc15 Tracking Number 430Presentation: Session: Jets and Wakes 2 Room: Room E Session start: 15:00 Tue 25 Aug 2015 Seyed Mohammad Hosseini hosse@mech.kth.se Affifliation: Linné FLOW Centre, KTH Mechanics, Royal Institute of Technology, SeRC, SE-100 44 Stockholm, Sweden Ricardo Vinuesa rvinuesa@hawk.iit.edu Affifliation: Linné FLOW Centre, KTH Mechanics, Royal Institute of Technology, SeRC, SE-100 44 Stockholm, Sweden Philipp Schlatter pschlatt@mech.kth.se Affifliation: Linné FLOW Centre, KTH Mechanics, Royal Institute of Technology, SeRC, SE-100 44 Stockholm, Sweden Ardeshir Hanifi ardeshir.hanifi@foi.se Affifliation: Linné FLOW Centre, KTH Mechanics, Royal Institute of Technology, SeRC, SE-100 44 Stockholm, Sweden, Swedish Defence Research Agency, FOI, SE-164 90 Stockholm, Sweden Dan Henningson henning@mech.kth.se Affifliation: Linné FLOW Centre, KTH Mechanics, Royal Institute of Technology, SeRC, SE-100 44 Stockholm, Sweden Topics: - Instability and transition, - Wall bounded flows, - Jets and wakes Abstract: A three dimensional direct numerical simulation has been performed to study the flow around the asymmetric NACA-4412 wing at a moderate chord Reynolds number (Rec = 400, 000) with an angle of attack of 5◦ . The flow case under investigation poses numerous challenges for a numerical method due to the wide range of scales and complicated flow physics induced by the geometry. The mesh is optimized and well resolved to account for such varying scales in the flow. An unsteady volume force is used to trip the flow to turbulence on both sides of the wing at 10% chord. Full turbulent statistics are computed on the fly to further investigate the complicated flow features around the wing. The present simulation shows the potential of high-order methods in simulating complex external flows at moderately high Reynolds numbers. |