What is it about?
It is about replicating the experimental visualization of the laboratory experiment of 1980 by Pullin and Perry for the uniform and accelerated flow past a mounted wedge by numerical simulation. The simulation of the flow across a time span significantly greater than the aforesaid lab experiment is the current study's major achievement. For the accelerated flow, the onset of shear layer instability leading to a more complicated flow towards transition to turbulence have also been aptly resolved. The quality of our simulation is validated by the close similarity of our simulation to the high Reynolds number experimental results of Lian1(989) for the accelerated flow across a typical flat plate. All three steps of vortex shedding, including the exceedingly intricate three-fold structure, have been captured quite efficiently.
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Why is it important?
While the experiment captured the very early stages of the flow, our numerical experiments were able to capture the flow features upto the transition to turbulence stage.
Perspectives
Hopefully, on seeing our simulation, somebody will recreate the same in the laboratory validating our numerical results.
Jiten Kalita
Indian Institute of Technology Guwahati
Read the Original
This page is a summary of: Vortex dynamics of accelerated flow past a mounted wedge, Physics of Fluids, December 2023, American Institute of Physics,
DOI: 10.1063/5.0177161.
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