Machine-learning methods on noisy and sparse data

K Poulinakis, D Drikakis, IW Kokkinakis… - Mathematics, 2023 - mdpi.com
Experimental and computational data and field data obtained from measurements are often
sparse and noisy. Consequently, interpolating unknown functions under these restrictions to …

High-speed shock–boundary-layer interaction over deformed surfaces

IW Kokkinakis, D Drikakis, SM Spottswood… - Physics of …, 2023 - pubs.aip.org
This paper concerns the interaction of an oblique shock wave with a supersonic turbulent
boundary layer over a thin panel surface, leading to shock–boundary layer interaction and …

[HTML][HTML] Direct numerical simulation of supersonic flow and acoustics over a compression ramp

IW Kokkinakis, D Drikakis, K Ritos, SM Spottswood - Physics of Fluids, 2020 - pubs.aip.org
We present direct numerical simulations of the shock wave boundary layer interaction (SBLI)
at Mach number 2.9 over a 24 ramp. We study both the numerical accuracy and flow …

Direct numerical simulation of a supersonic turbulent boundary layer over a compression–decompression corner

J Duan, X Li, X Li, H Liu - Physics of Fluids, 2021 - pubs.aip.org
A direct numerical simulation of the interaction between a shock wave and the supersonic
turbulent boundary layer in a compression–decompression corner with a fixed 24 deflection …

Multi-objective RANS aerodynamic optimization of a hypersonic intake ramp at Mach 5

F De Vanna, D Bof, E Benini - Energies, 2022 - mdpi.com
The work describes a systematic optimization strategy for designing hypersonic inlet intakes.
A Reynolds-averaged Navier-Stokes database is mined using genetic algorithms to develop …

Generalizability of transformer-based deep learning for multidimensional turbulent flow data

D Drikakis, IW Kokkinakis, D Fung, SM Spottswood - Physics of Fluids, 2024 - pubs.aip.org
Deep learning has been going through rapid advancement and becoming useful in scientific
computation, with many opportunities to be applied to various fields, including but not limited …

[HTML][HTML] Wavelet analysis of supersonic shock-boundary-layer interaction

IW Kokkinakis, G Khujadze, D Drikakis… - Physics of …, 2023 - pubs.aip.org
We present a wavelet analysis of supersonic shock-boundary-layer interaction. We have
used direct numerical simulation data for supersonic flow over a compression ramp and …

Aeroelastic Effects in Supersonic Shock-Turbulent Boundary Layer Interaction over Flexible Panels

IW Kokkinakis, D Drikakis, S Michael Spottswood… - AIAA Journal, 2024 - arc.aiaa.org
The dynamic coupling between a Mach 1.94 shock wave/turbulent boundary layer
interaction (SBLI) and a flexible panel is investigated. High-order numerical simulations are …

Aeroacoustic loading of im**ing supersonic boundary-layer interaction on statically deformed surfaces

IW Kokkinakis, D Drikakis, S Michael Spottswood… - AIAA Journal, 2024 - arc.aiaa.org
This paper concerns the interaction of an im**ing shock wave with a supersonic turbulent
boundary layer over several distinct and permanently deformed surfaces, resulting in …

A deep learning super-resolution model for turbulent image upscaling and its application to shock wave–boundary layer interaction

F Sofos, D Drikakis, IW Kokkinakis, SM Spottswood - Physics of Fluids, 2024 - pubs.aip.org
Upscaling flow features from coarse-grained data is paramount for extensively utilizing
computational physics methods across complex flow, acoustics, and aeroelastic …