Flow Resolution

News in 2021-2022 from Prof. Poggie's research group.

Forced DNS of Flared Cone

This August, Purdue graduate student Andrew Shuck successfully defended his MS Thesis entitled "Study of Transition on a Flared Cone with Forced Direct Numerical Simulation." In his research, Shuck simulated the flared cone experiments carried out in the Purdue Mach 6 Quiet Tunnel (BAM6QT) by Chynoweth (2018). DNS of this flow had previously been carried out by Hader (2019), but Shuck's work introduced a different numerical technique and forcing with fairly realistic wind tunnel noise. The flared cone configuration is shown below.

Flared cone configuration

The video below illustrates how Shuck's approach captures transition for a strong forcing case. The orange contours show skin friction on the cone surface, and the grayscale contours show density in a side plane and end plane.

Andrew Shuck was co-advised by Prof. Poggie and Prof. Blaisdell under the "Multidisciplinary Hypersonics Program," sponsored by the Air Force Research Laboratory and a DoD HPCMP Frontier Project.

Panel on Defense Research

On March 11, 2021, the Purdue College of Engineering hosted Dr. Mark Lewis under the Distinguished Engineering Lecture series. A faculty panel discussion followed the virtual lecture, focusing on defense-related research at universities. A recording of the discussion is linked below. The panelists included Mark Lewis, Jonathan Poggie, Carol Handwerker, Jen Neville, and Steve Heister. Purdue Ph.D. student Liz Benitez was moderator.

You can find the link to Dr. Lewis's full lecture on the YouTube page.

Flows and Colors

The 1974 film "Courants et Couleurs" (Flows and Colors) highlights flow visualization experiments carried out in the water tunnel at Châtillon by the French aerospace research agency ONERA. As noted in the French language description on the original website, this film has both an artistic and scientific character.

You will probably recognize the very well-known delta-wing visualizations and the experiments on a model of the Concorde. Much of this work was led by Henri Werlé; see the summary in an Annual Review of Fluid Mechanics article by J. M. Délery.