Large eddy simulation of aircraft at affordable cost: a milestone in computational fluid dynamics

KA Goc, O Lehmkuhl, GI Park, ST Bose, P Moin - Flow, 2021 - cambridge.org
While there have been numerous applications of large eddy simulations (LES) to complex
flows, their application to practical engineering configurations, such as full aircraft models …

Turbulent flow around a square cylinder at Reynolds number 22,000: A DNS study

FX Trias, A Gorobets, A Oliva - Computers & Fluids, 2015 - Elsevier
The turbulent flow around a square cylinder at Reynolds number 22, 000 (based on the
cylinder diameter and the inflow velocity) is studied by means of direct numerical simulation …

Deep reinforcement learning for flow control exploits different physics for increasing Reynolds number regimes

P Varela, P Suárez, F Alcántara-Ávila, A Miró… - Actuators, 2022 - mdpi.com
The increase in emissions associated with aviation requires deeper research into novel
sensing and flow-control strategies to obtain improved aerodynamic performances. In this …

Symmetry-preserving discretization of Navier–Stokes equations on collocated unstructured grids

FX Trias, O Lehmkuhl, A Oliva… - Journal of …, 2014 - Elsevier
A fully-conservative discretization is presented in this paper. The same principles followed
by Verstappen and Veldman (2003)[3] are generalized for unstructured meshes. Here, a …

A low-dissipation finite element scheme for scale resolving simulations of turbulent flows

O Lehmkuhl, G Houzeaux, H Owen… - Journal of …, 2019 - Elsevier
The present work extends the conservative convective scheme proposed by Charnyi et
al.(2017)[13], originally formulated for mixed finite elements and tested in laminar flows, to …

Low-frequency unsteadiness in the vortex formation region of a circular cylinder

O Lehmkuhl, I Rodríguez, R Borrell, A Oliva - Physics of Fluids, 2013 - pubs.aip.org
The presence of low-frequency fluctuations in the wake of bluff bodies have been observed
in several investigations. Even though the flow past a circular cylinder at Re= 3900 (Re= U …

A finite-volume/level-set method for simulating two-phase flows on unstructured grids

N Balcázar, L Jofre, O Lehmkuhl, J Castro… - International journal of …, 2014 - Elsevier
The conservative level-set method for capturing the interface between two fluids is combined
with a variable density projection scheme to simulate incompressible two-phase flows on …

On the flow past a circular cylinder from critical to super-critical Reynolds numbers: Wake topology and vortex shedding

I Rodríguez, O Lehmkuhl, J Chiva, R Borrell… - International Journal of …, 2015 - Elsevier
Large-eddy simulations (LES) of the flow past a circular cylinder are used to investigate the
flow topology and the vortex shedding process at Reynolds numbers Re= 2.5× 10 5-8.5× 10 …

Unsteady forces on a circular cylinder at critical Reynolds numbers

O Lehmkuhl, I Rodríguez, R Borrell, J Chiva, A Oliva - Physics of Fluids, 2014 - pubs.aip.org
It is well known that the flow past a circular cylinder at critical Reynolds number combines
flow separation, turbulence transition, reattachment of the flow, and further turbulent …

Flow and turbulent structures around simplified car models

DE Aljure, O Lehmkuhl, I Rodríguez, A Oliva - Computers & Fluids, 2014 - Elsevier
External car aerodynamics study has great importance in overall car efficiency and ride
stability, being a key element in successful automotive design. The flow over car geometries …