DIRECT NUMERICAL SIMULATION OF AN EQUILIBRIUM ADVERSE PRESSURE GRADIENT TURBULENT BOUNDARY LAYER AT THE VERGE OF SEPARATION etc15 Tracking Number 249Presentation: Session: Wall-bounded flows 6 Room: Room B Session start: 10:30 Fri 28 Aug 2015 Vassili Kitsios vassili.kitsios@monash.edu Affifliation: Monash University Callum Atkinson callum.atkinson@monash.edu Affifliation: Monash Univeristy Juan Sillero sillero@torroja.dmt.upm.es Affifliation: Universidad Politécnica de Madrid Guillem Borrell guillem@torroja.dmt.upm.es Affifliation: Universidad Politécnica de Madrid Ayse Gungor asye.gungot@itu.edu.tr Affifliation: Istanbul Technical University Javier Jimenez jimenez@torroja.dmt.upm.es Affifliation: Universidad Politécnica de Madrid Julio Soria julio.soria@monash.edu Affifliation: Monash University Topics: - Wall bounded flows Abstract: The statistics and structure of a self-similar equilibrium adverse pressure gradient (APG) turbulent boundary layer (TBL) are investigated using a direct numerical simulation (DNS) of the flow at the verge of separation. Flow simulations are performed using the DNS TBL code of Simens et al. [8] and Borrell et al. [1] with the desired equilibrium APG achieved via the use of a tailored far-field boundary condition. The APG TBL develops over a momentum thickness based Reynolds number of Reθ ≈ 2000 to 6000, achieving a region of constant friction coefficient (Cf ), pressure velocity (up) and shape factor (H). One- and two-point statistics are presented under both inner wall (uτ ) and pressure velocity (up ) based scaling. |