Adjoint-based aerodynamic shape optimization including transition to turbulence effects

GLO Halila, JRRA Martins, KJ Fidkowski - Aerospace Science and …, 2020 - Elsevier
The inclusion of transition to turbulence effects in aerodynamic shape optimization makes it
possible to use it as a tool for the design of airframes with laminar flow. Modified Reynolds …

Predicting transition with wall-distance-free SST k-ω model

MM Rahman - Computers & Fluids, 2023 - Elsevier
Unlike the correlation-based γ–R e θ transition model, an exceptionally simplified approach
is applied to extend the wall-distance-free (WDF) model toward transition predictions. An …

Effects of boundary layer transition on the aerodynamic analysis of high-lift systems

GLO Halila, AP Antunes, RG Da Silva… - Aerospace Science and …, 2019 - Elsevier
Transition to turbulence is known as a factor that impacts the performance of high-lift
devices, but only a few numerical results that include transition are available in the literature …

A wall-boundary-natural transitional Reynolds-stress model for high-order wing-body simulations

S Wang, S Wang, X Fu, X Deng - Physics of Fluids, 2024 - pubs.aip.org
The precise simulation of full-size wing-body configuration in real flight conditions is still a
challenge in computational fluid dynamics in which transition and flow separation are the …

A Surrogate-Based Method for Compressible Boundary-Layer Transition Prediction

H Nie, W Song, Z Han, J Chen, G Tu - Journal of Aircraft, 2022 - arc.aiaa.org
To improve robustness and efficiency of automatic transition prediction in aerodynamic
design, a reduced model of linear stability analysis is usually adopted, such as e N …

Linear stability-based smooth Reynolds-averaged Navier–Stokes transition model for aerodynamic flows

GLO Halila, A Yildirim, CA Mader, KJ Fidkowski… - AIAA Journal, 2022 - arc.aiaa.org
The inclusion of transition to turbulence effects in computational fluid dynamics simulations
makes it possible to design laminar flow airframes. It also increases the level of physical …

High-Reynolds number transitional flow simulation via parabolized stability equations with an adaptive RANS solver

GLO Halila, G Chen, Y Shi, KJ Fidkowski… - Aerospace Science and …, 2019 - Elsevier
The accurate prediction of transition is relevant for aerodynamic analysis and design
applications. Extending the laminar flow region over airframes is a potential way to reduce …

Replicating transition with modified Spalart–Allmaras model

MM Rahman, H Zhu, K Hasan, S Chen - Mathematics and Computers in …, 2024 - Elsevier
An algebraic transition model has been developed to preserve the “flow-structure-adaptive”
characteristics in “Reynolds-Averaged Navier–Stokes”(RANS) computations for multiple …

An efficient setup for freestream turbulence on transition prediction over aerospace configurations

GLO Halila, EDV Bigarella, AP Antunes… - Aerospace Science and …, 2018 - Elsevier
Inflow turbulence variables play a key role in the performance of correlation-based transition
models. In order to consider this important effect, a wing-body configuration in transonic flow …

Blending of Reynolds Stress Transport Model and Transition Model

Y Kuya, T Ariki, S Endo, T Sujisakulvong, K Sawada - AIAA Journal, 2023 - arc.aiaa.org
IMPROVEMENTS in computer performance have expanded the applicability of high-fidelity
numerical methods in fluid dynamics, such as direct numerical simulation and large-eddy …