Effect of gaps and bumps on boundary layer transition

Transition to turbulence is challenging research with importance to both low and high speed flight vehicle. This seminar will focus on the long standing topic of the effect of surface irregularities on transition, including the long researched problem of bumps and the much less investigated gaps. Despite having been investigated for almost a century, there are still many open questions about the effect of bumps on transition. The seminar will include low-speed low-turbulence wind tunnel experiments, direct numerical simulations, local/global instability analysis, advanced signal processing. The talk will cover receptivity, interaction with TS waves and by pass transition. Most of the seminar will focus on the subsonic regime, but applications to supersonic regime will also be covered.