High resolution compressible CFD simulations

High Resolution Compressible CFD Simulations

First and second order numerical schemes are highly dissipative, thus leading to incorrect prediction of turbulent shock-wave turbulent-boundary layer interaction (SWBLI) induced separation. High-order (HO) schemes in conjunction with large eddy simulations lead to significantly better results, however, pressure fluctuations can be under-, or over-predicted, due to numerical dispersion errors.

In the last few years, however, significant progress has been made with regards to the application of high-resolution (HR) and HO methods to compressible flows featuring acoustic excitation, turbulent SWBLI, and low-Mach number effects [1-3].

The aim of this project is to apply HR and HO methods to supersonic/hypersonic turbulent SWBLI and supersonic/hypersonic boundary layers inducing acoustic loading on the structure, and investigate both the accuracy and efficiency of these methods in the framework of advanced CFD methods, such as implicit large eddy simulation (ILES) and hybrid ILES/Reynolds-Averaged-Navier-Stokes (RANS).

Recent findings of this ongoing project can be found in the following publications:

  • K. Ritos, I. W. Kokkinakis, D. Drikakis, Wall-pressure spectra models for supersonic and hypersonic turbulent boundary layers, Journal of Sound & Vibration, Volume 443, 90 – 108, DOI: 10.1016/j.jsv.2018.11.001, 2019
  • K. Ritos, I. W. Kokkinakis, D. Drikakis, Acoustic loading beneath hypersonic transitional and turbulent boundary layers, Journal of Sound & Vibration, Volume 441, 50 – 62, DOI: 10.1016/j.jsv.2018.10.021, 2019
  • I. W. Kokkinakis, D. Drikakis, D. L. Youngs, Modeling of Rayleigh-Taylor mixing using single-fluid models, Physical Review E, Volume 99, Issue 1, 2019
  • K. Ritos, I. W. Kokkinakis, D. Drikakis, Performance of high-order implicit Large Eddy Simulations, Computers & Fluids, Volume 173, 307 – 312, DOI:10.1016/j.compfluid.2018.01.030, 2018
  • K. Ritos, I. W. Kokkinakis, D. Drikakis, Physical insight into the accuracy of finely-resolved iLES in turbulent boundary layers, Computers & Fluids, Volume 169, 309 – 316, DOI: 10.1016/j.compfluid.2017.07.018, 2018
  • K. Ritos, I. W. Kokkinakis, D. Drikakis, S. M. Spottswood, Implicit large eddy simulation of acoustic loading in supersonic turbulent boundary layers, Physics of Fluids, Volume 29, 046101, DOI: 10.1063/1.4979965, 2017

For more information about the project contact Dr Konstantinos Ritos (konstantinos.ritos@strath.ac.uk), or Dr Ioannis Kokkinakis (ioannis.kokkinakis@strath.ac.uk), Lecturers at the Department of Mechanical and Aerospace Engineering at the University of Strathclyde.
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