DNS of a non-equilibrium adverse pressure gradient turbulent boundary layer*

A new direct numerical simulation (DNS) dataset of a non-equilibrium adverse pressure gradient (APG) turbulent boundary layer (TBL) that evolves from a zero-pressure-gradient (ZPG) TBL to a TBL which is very close to separation at $Re_\theta$ is around 8200 is presented. There are two simulations running together in the DNS computational setup. The APG TBL spans $Re_\theta = 1476 - 8276$. Mean velocity results do not satisfy the log law as the defect in the velocity increases. The production and the Reynolds stress peak are observed around $y/\delta^*=1$ after the flow is evolved up to a certain point. The new dataset is compared with other datasets in terms of mean values, Reynolds stresses and turbulent kinetic energy budgets and using this comparison scaling study is performed.