Numerical investigations of laminar separation bubbles under the influence of periodic gusts

D Ohno, M Greiner, J Müller, U Rist - AIAA Journal, 2023 - arc.aiaa.org
Direct numerical simulations were performed to investigate the behavior of laminar
separation bubbles subject to vertical gusts in an airfoil flow. Oscillating boundary-layer …

Laminar-to-turbulent transition in airfoil boundary layer flows at oscillating inflow conditions

D Ohno - 2023 - elib.uni-stuttgart.de
This thesis numerically investigates the laminar-to-turbulent transition in boundary-layer
flows on natural laminar flow airfoils under oscillating inflow conditions. Large-scale …

Generation of Hairpin Vortices Using a Hybrid Physio-Cyber Data Assimilation Approach

A Jariwala, J Wylie, A Tsolovikos… - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
Turbulent boundary layers are largely influenced by spatiotemporally developing coherent
structures known as Large-Scale Motions (LSMs). This work examines the idea of creating …

Direct numerical simulation of bypass transition under free-stream turbulence for compressible flows

D Ohno, B Selent, MJ Kloker, U Rist - International Conference on High …, 2021 - Springer
Direct numerical simulations (DNS) of bypass transition of a flat-plate boundary-layer subject
to free-stream turbulence (FST) were performed. A synthetic turbulent inflow is generated by …

Data assimilation

A Schröder, P Godbersen, S Gesemann… - VKI Lecture Series …, 2024 - elib.dlr.de
Data assimilation get increasingly important in experimental fluid dynamics. The field of
applications is expanding and the methods are becoming more differentiated. From data …

[PDF][PDF] Computational aspects for DNS of compressible turbulent boundary layers on up to full machine size

T Gibis, J Appelbaum, C Wenzel - researchgate.net
In this study, a representative benchmark case for the IAG in-house DNS code NS3D is
presented, which has been developed specifically with the aim of evaluating code …

[PDF][PDF] SYNTHETIC JET ACTUATION FOR BOUNDARY LAYER RE-ENERGIZATION AND PHYSIO-CYBER SIMULATIONS

JDB Wylie, A Jariwala, A Burtsev, S Suryanarayanan… - tsfp-conference.org
Separated flows exist in several relevant external flow scenarios: wind turbine blades,
stalled airfoils, compressor blades, etc. The control of these flows leads to improved …