Flow Resolution
News in 2023-2024 from Prof. Poggie's research group.
Cylinder / Skewed Flare
Purdue MS student Ben Derks recently completed a a computational campaign to match a series of experiments at Mach 2.85 carried out in the 1980s at NASA Ames Research Center. The test articles were a set of cone / skewed flare configurations designed to produce highly three-dimensional shock-wave / boundary-layer interactions in the absence of end-wall effects.
The video below shows the instantaneous skin friction magnitude for detached eddy simulations for a flare inclination angle of 23 deg. A high degree of large-scale separation unsteadiness is evident in these flows.
More details are available here.
CI-PIVOT
Purdue University has an open position for a Senior Computational Scientist to advise researchers on high-performance computing and to help research teams make effective and creative use of modern computational hardware. https://bit.ly/49HF8FA The position is associated with the CI-PIVOT project.
Transverse Jet at Mach 6
The movie above shows the wall pressure field predicted by a detached-eddy simulation of a transverse jet on a 7 degree half-angle cone. The view is approximately in the downstream direction. The calculations were carried out by PhD student Matthew Dean using the DoD CREATE Kestrel KCFD code. The freestream conditions correspond to those of Purdue’s Mach 6 quiet-flow hypersonic wind tunnel, the BAM6QT. In the computation, the jet issues from a 1 mm diameter hole in the cone, at a stagnation pressure of 689 kPa. Significant large-scale unsteadiness is observed, which is the subject of ongoing computational and experimental research.
About
Prof. Poggie's research interests have encompassed the experimental, computational, and theoretical aspects of fluid dynamics and plasma physics. Current work in our research group focuses on high Mach number flow, laminar-turbulent transition, large-scale separation unsteadiness, and electrical discharges for flow control.