517 citations · 1.3k across the 27 of their papers we have counts for
28 papers
Global modal/non-modal analysis of high-enthalpy Martian entry vehicles
Adrián Antón-Álvarez, Adrián Lozano-Durán
We analyze laminar-to-turbulent transition over a blunt capsule representative of Martian entry at Mach 26 using global modal and transient-growth analyses about a thermochemical b…
Machine-learning wall model of large-eddy simulation for low- and high-speed flows over rough surfaces
Rong Ma, Adrian Lozano-Duran
We present a wall model for large-eddy simulation that incorporates surface-roughness effects and is applicable across low- and high-speed flows, for both transitional and fully ro…
Machine-learning wall-model large-eddy simulation accounting for isotropic roughness under local equilibrium
Rong Ma, Adrian Lozano-Duran
We introduce a wall model (WM) for large-eddy simulation (LES) applicable to rough surfaces with Gaussian and non-Gaussian distributions for both transitionally and fully rough reg…
Building-block flow model for computational fluids
Gonzalo Arranz, Yuenong Ling, Sam Costa +2
We introduce a closure model for wall-modeled large-eddy simulation (WMLES), referred to as the Building-block Flow Model (BFM). The foundation of the model rests on the premise th…
Limits to extreme event forecasting in chaotic systems
Yuan Yuan, Adrian Lozano Duran
Predicting extreme events in chaotic systems, characterized by rare but intensely fluctuating properties, is of great importance due to their impact on the performance and reliabil…
The coherent structure of the energy cascade in isotropic turbulence
Danah Park, Adrian Lozano-Duran
The energy cascade, i.e. the transfer of kinetic energy from large-scale to small-scale flow motions, has been the cornerstone of turbulence theories and models since the 1940s. Ho…
Machine learning building-block-flow wall model for large-eddy simulation
Adrián Lozano-Durán, H. Jane Bae
A wall model for large-eddy simulation (LES) is proposed by devising the flow as a combination of building blocks. The core assumption of the model is that a finite set of simple c…
Causality analysis of large-scale structures in the flow around a wall-mounted square cylinder
Álvaro Martínez-Sánchez, Esteban López, Soledad Le Clainche +3
The aim of this work is to analyse the formation mechanisms of large-scale coherent structures in the flow around a wall-mounted square cylinder, due to their impact on pollutant t…
Numerical and modeling error assessment of large-eddy simulation using direct-numerical-simulation-aided large-eddy simulation
H. Jane Bae, Adrian Lozano-Duran
We study the numerical errors of large-eddy simulation (LES) in isotropic and wall-bounded turbulence. A direct-numerical-simulation (DNS)-aided LES formulation, where the subgrid-…
A Database for Reduced-Complexity Modeling of Fluid Flows
Aaron Towne, Scott T. M. Dawson, Guillaume A. Brès +8
We present a publicly accessible database designed to aid in the conception, training, demonstration, evaluation, and comparison of reduced-complexity models for fluid mechanics. A…
Information-theoretic formulation of dynamical systems: causality, modeling, and control
Adrián Lozano-Durán, Gonzalo Arranz
The problems of causality, modeling, and control for chaotic, high-dimensional dynamical systems are formulated in the language of information theory. The central quantity of inter…
POD-based study of turbulent plane Poiseuille flow: comparing structure and dynamics between quasi-linear simulations and DNS
Marios-Andreas Nikolaidis, Petros J. Ioannou, Brian F. Farrell +1
Turbulence in the restricted nonlinear (RNL) dynamics is analyzed and compared with DNS of Poiseuille turbulence at . The structures are obtained by POD analysis of the two…
Requirements and sensitivity analysis of RANS-free wall-modeled LES
Michael Whitmore, Adrián Lozano-Durán, Parviz Moin
We study the sensitivity of wall model input variables to the modeling choices of the outer LES. This work is motivated by sensitivities observed in dynamic slip wall models. These…
Cause-and-effect of linear mechanisms sustaining wall turbulence
Adrián Lozano-Durán, Navid C. Constantinou, Marios-Andreas Nikolaidis +1
Despite the nonlinear nature of turbulence, there is evidence that part of the energy-transfer mechanisms sustaining wall turbulence can be ascribed to linear processes. The differ…
Alternative physics to understand wall turbulence: Navier-Stokes equations with modified linear dynamics
Adrán Lozano-Durán, Marios-Andreas Nikolaidis, Navid C. Constantinou +1
Despite the nonlinear nature of wall turbulence, there is evidence that the energy-injection mechanisms sustaining wall turbulence can be ascribed to linear processes. The differen…
Effect of a weak current on wind-generated waves in the wrinkle regime
C. Nove-Josserand, S. Perrard, A. Lozano-Duran +3
We investigate numerically the influence of a weak current on wind-generated surface deformations for wind velocity below the onset of regular waves. In that regime, the liquid sur…
Nonlinear mechanism of the self-sustaining process in the buffer and logarithmic layer of wall-bounded flows
Hyunji Jane Bae, Adrian Lozano-Duran, Beverley J. McKeon
The nonlinear mechanism in the self-sustaining process (SSP) of wall-bounded turbulence is investigated. Resolvent analysis is used to identify the principal forcing mode which pro…
Non-equilibrium three-dimensional boundary layers at moderate Reynolds numbers
Adrián Lozano-Durán, Marco Giometto, George I. Park +1
Non-equilibrium wall turbulence with mean-flow three-dimensionality is ubiquitous in geophysical and engineering flows. Under these conditions, turbulence may experience a counter-…
DNS-aided explicitly filtered LES
H. Jane Bae, Adrián Lozano-Durán
The equations for LES are formally derived by low-pass filtering the NS equations with the effect of the small scales on the larger ones captured by a SGS model. However, it is kno…
Causality of energy-containing eddies in wall turbulence
Adrián Lozano-Durán, H. Jane Bae, Miguel P. Encinar
Turbulent flows in the presence of walls may be apprehended as a collection of momentum- and energy-containing eddies (energy-eddies), whose sizes differ by many orders of magnitud…
Resolvent-based estimation of space-time flow statistics
Aaron Towne, Adrian Lozano-Duran, Xiang Yang
We develop a method to estimate space-time flow statistics from a limited set of known data. While previous work has focused on modeling spatial or temporal statistics independentl…
Characteristic scales of Townsend's wall attached eddies
Adrián Lozano-Durán, Hyunji Jane Bae
Townsend (1976) proposed a structural model for the logarithmic layer (log-layer) of wall turbulence at high Reynolds numbers, where the dominant momentum-carrying motions are orga…
Dynamic slip wall model for large-eddy simulation
H. Jane Bae, Adrián Lozano-Durán, Sanjeeb T. Bose +1
Wall modelling in large-eddy simulation (LES) is necessary to overcome the prohibitive near-wall resolution requirements in high-Reynolds-number turbulent flows. Most existing wall…
Error scaling of large-eddy simulation in the outer region of wall-bounded turbulence
Adrián Lozano-Durán, Hyunji Jane Bae
We study the error scaling properties of large-eddy simulation (LES) in the outer region of wall-bounded turbulence at moderately high Reynolds numbers. In order to avoid the addit…