Our research team combines expertise in numerical simulations, machine learning, and experimental techniques to tackle fundamental problems in fluid mechanics. Together, we are developing innovative approaches to understand and control complex turbulent flows, with applications ranging from energy efficiency to sustainable transport.

10
Team Members
5
PhD Students
12
Publications (2024)
4
Research Projects

Team Structure

Click on any team member to view their detailed profile

Dr. Lionel Agostini

Dr. Lionel Agostini

Team Lead

Nishant Kumar

Dr. Nishant Kumar

Postdoc Researcher

2023-2025

Lou Guérin

Lou Guérin

PhD Candidate

2022-2025

Niccolò Tonioni

Niccolò Tonioni

PhD Candidate

2023-2026

Blessing Akinpelu

Blessing Akinpelu

PhD Candidate

2024-2027

Kushagra Saurabh

Kushagra Saurabh

PhD Candidate

2025-2028

Ulrich Junior

Ulrich Junior M. K.

PhD Candidate (CIFRE)

2025-2029

Team Lead

Dr. Lionel Agostini

Dr. Lionel Agostini

Chargé de Recherche HDR - CNRS - Section 10

I am a researcher in fluid mechanics with over 15 years of experience in the study and modelling of wall-bounded turbulent flows. My expertise is built on an interdisciplinary approach that combines fundamental theory of turbulent flows, high-fidelity numerical code development, and implementation of advanced machine learning methods.

My work aims to develop robust predictive models and innovative control strategies to optimise fluid systems performance, leveraging deep knowledge of turbulence physics combined with machine learning algorithms capabilities. This approach directly contributes to addressing current energy and environmental challenges by improving efficiency in transport systems and industrial heat exchangers.

I currently lead and participate in several interdisciplinary research projects:

  • ANR PRC BENEFIT (2026-2029) - Co-P.I.: Development of an innovative framework for active flow control, combining stability analysis and machine learning to exploit natural instabilities for optimising heat transfer and reducing drag (Consortium: Pprime, IUSTI, DynFluid)
  • Région Nouvelle-Aquitaine CHARGER (2025-2028) - P.I.: Enhancement of convective heat transfer through multi-scale control of near-wall turbulence (wall oscillations + Görtler vortices), integrating high-fidelity simulations, reduced-order modelling, and machine learning
  • ANR JCJC INFERENCE (2024-2028) - P.I.: Development of reduced-order models for turbulent boundary layer flows with Reynolds number and heating effects
  • ANR MUFDD (2023-2027): Modelling of urban canopy flows using data-driven approaches, developing estimators and reduced-order models from simulations and experiments
  • ANR SOLAIRE (2022-2026) - Co-P.I.: Improvement of high-temperature solar receiver efficiency through active control of near-wall turbulence

Current Team Members

Nishant Kumar

Dr. Nishant Kumar

Postdoctoral Researcher

2023-2025

Funding: ANR MUFDD

Project Summary

Data-driven modelling of urban canopy flows. This research focuses on developing methods to build estimators and reduced-order models from simulation and experimental data, with particular emphasis on urban canopy flow dynamics.

Research Focus

  • Development of advanced data assimilation techniques for maintaining model accuracy in real conditions
  • Integration of physical knowledge into machine learning algorithm design
  • Implementation of reduced-order modelling techniques for complex environmental flows

Conferences 2

  • Deep Learning of SPOD Time-Domain Coefficient Dynamics for Reduced-Order Modeling of Street Canyon Flow

    N. Kumar, L. Agostini, F. Kerhervé & L. Cordier

    1st International Symposium AI and Fluid Mechanics, Chania, Greece (May 2025)

  • Spectral Proper Orthogonal Decomposition of Street Canyon Flow Dynamics and Its Application to Time-Domain Reconstruction

    N. Kumar, L. Agostini, F. Kerhervé & L. Cordier

    EuroMech/ERCOFTAC Joint Conference on Data-Driven Fluid Dynamics (Colloquium 629), London, United Kingdom (April 2025)

Lou Guérin

Lou Guérin

PhD Candidate

2022-2025

Funding: ANR SOLAIRE

Project Summary

Improving heat transfers in solar receivers through active control methods. The research focuses on enhancing thermal performance of concentrated solar power systems through innovative flow control techniques, particularly using spanwise wall oscillations.

Main contributions

  • Demonstrated for the first time a preferential enhancement of heat transfer over drag, breaking the Reynolds analogy
  • Developed machine learning algorithms for control parameter optimisation
  • Presented research at multiple international conferences including DLES 14 and EUROMECH COLLOQUIUM 631

Conferences 4

  • Policy-Based Signal Shape Optimization for Drag Reduction via Spanwise Wall Oscillations

    L. Guérin, L. Cordier, C. Flageul, S. Grieu & L. Agostini

    EuroMech/ERCOFTAC Joint Conference on Data-Driven Fluid Dynamics (Colloquium 629), London, United Kingdom (April 2025)

  • Autoencoder-Based Dimensionality Reduction of Turbulent Channel Flow Under Spanwise Wall Oscillations

    L. Guérin, T. Fisk, L. Cordier, C. Flageul & L. Agostini

    DTE AICOMAS, Paris, France (February 2025)

  • Breaking the Reynolds Analogy: Decoupling Turbulent Heat and Momentum Transport via Spanwise Wall Oscillation in Wall-Bounded Flow

    L. Guérin, C. Flageul, L. Cordier, S. Grieu & L. Agostini

    DLES 14, Erlangen, Germany (April 2024)

  • Breaking the Reynolds Analogy: Decoupling Turbulent Heat and Momentum Transport via Spanwise Wall Oscillation in Wall-Bounded Flow

    L. Guérin, C. Flageul, L. Cordier, S. Grieu & L. Agostini

    EUROMECH COLLOQUIUM 631, Madrid, Spain (March 2024)

PhD Defense

PhD Manuscript

Defense scheduled for December 9, 2025

Niccolò Tonioni

Niccolò Tonioni

PhD Candidate

2023-2026

Funding: EUR Intree/KTH

Research Focus

Deep learning and machine learning for computational fluid dynamics. Developing data-driven reduced-order models using variational autoencoders and neural networks to predict turbulent flow behavior. His work focuses on extracting essential characteristics of turbulent flows and projecting them into reduced spaces, with applications to flow control and vortex-induced vibrations.

Main contributions

  • VIVALDy Framework: Developed a hybrid generative reduced-order model combining β-Variational Autoencoders with adversarial loss for vortex-induced vibrations
  • Novel deep learning approaches for flow state reconstruction from minimal sensor measurements
  • Transformer-based architectures integrated with autoencoders for advanced turbulence modeling
  • Expertise in linear and nonlinear projection-based methods for flow analysis

Conferences 4

  • Data-Driven Modeling of Near-Wall Turbulence Using β-Variational Autoencoder, Transformers, and Adversarial Loss

    N. Tonioni, L. Agostini, F. Kerhervé, L. Cordier & R. Vinuesa

    11th International Symposium on Turbulence, Heat and Mass Transfer, Tokyo, Japan (July 2025)

  • VIVALDy: A Novel β-Variational Autoencoder Approach with Adversarial Loss for Low-Order Dynamical Modeling of Vortex-Induced Vibrations

    N. Tonioni, L. Agostini, F. Kerhervé, L. Cordier & R. Vinuesa

    1st International Symposium AI and Fluid Mechanics, Chania, Greece (May 2025)

  • β-Variational Autoencoder and Transformer-Based Data-Driven Modeling of Near-Wall Turbulence

    N. Tonioni, M. Umair, L. Agostini, F. Kerhervé, L. Cordier & R. Vinuesa

    EuroMech/ERCOFTAC Joint Conference on Data-Driven Fluid Dynamics (Colloquium 629), London, United Kingdom (April 2025)

  • Reduced-Order Modeling of Experimental Turbulent Flows: From Linear Projection-Based Methods to Autoencoders

    N. Tonioni, L. Agostini, F. Kerhervé, L. Cordier & R. Vinuesa

    DTE AICOMAS, Paris, France (February 2025)

Research Interests

Deep Learning Autoencoders Turbulence Modeling Reduced-Order Models Neural Networks Flow Control

Available Resources

VIVALDy Project

Interactive visualization and documentation of the VIVALDy framework - A hybrid generative reduced-order model for turbulent flows

Blessing Akinpelu

Blessing Akinpelu

PhD Candidate

2024-2027

Funding: ANR INFERENCE

Project Summary

Modelling of near-wall turbulence at high Reynolds number and development of control strategies. This research focuses on understanding how outer flow structures affect wall shear and heat transfer, and developing predictive models using advanced data-driven approaches.

Current Focus

  • Literature review on scale interactions in wall-bounded turbulent flows
  • Development of computational framework for high-fidelity simulations
  • Training in advanced data analysis techniques for turbulence research
Kushagra Saurabh

Kushagra Saurabh

PhD Candidate

2025-2028

Funding: Government

Project Summary

Modelling and Control of Near-Wall Turbulence: From Physical Understanding to Machine Learning Approaches. This research leverages machine learning algorithms to develop predictive models for near-wall turbulence in both incompressible and compressible flows, with dual objectives of reducing drag in transport systems and maximizing heat transfer in thermal applications. The project aims to nail the boundary-layer theory down to create models capable of predicting relevant physical characteristics and response to forcing near-wall turbulence.

The main ambition is to generate a low-dimensional dynamical model pertaining to near-wall turbulence using autoencoders to identify compact coordinate systems. By capitalizing on a solid foundation in turbulence physics augmented by novel machine learning strategies, this work seeks to contribute towards universal modelling of turbulence and develop effective control systems compatible with industrial applications, addressing current energy and environmental challenges.

Research Interests

Wall-Bounded Turbulence Machine Learning Drag Reduction Heat Transfer Flow Control Autoencoders Reduced-Order Models

Ulrich Junior Meukiedje Kamgang

Ulrich Junior Meukiedje Kamgang

PhD Candidate (CIFRE)

2025-2029

Funding: CIFRE - Safran Aircraft Engines

Project Summary

Optimization of Heat Transfer by Active Turbulence Control: Development of Intelligent Strategies for Turbojet Engines. This CIFRE PhD project, conducted in collaboration between Institut Pprime and Safran Aircraft Engines, aims to develop an innovative approach for optimizing heat transfer in turbojet engines through active turbulence control. The main objective is to design and numerically validate intelligent control strategies that exploit natural flow instabilities, particularly Görtler instability, to significantly improve thermal performance while minimizing energy consumption.

The doctoral candidate will develop high-fidelity simulations, reduced-order models using machine learning techniques, and optimized control strategies. The approach combines plasma actuators (DBD) with advanced computational methods to manipulate turbulent structures and enhance heat transfer. This work integrates expertise in turbulence physics with cutting-edge machine learning algorithms to create self-adaptive systems capable of real-time thermal performance optimization.

The project specifically focuses on developing advanced numerical tools for understanding and controlling thermofluid instabilities, with a machine learning and reduced-order modeling approach. Experimental validation data will be provided through the ANR-BENEFIT project, conducted at IUSTI (Aix-Marseille Université).

Research Interests

Turbulence Heat Transfer Active Control Görtler Instability Plasma Actuators Machine Learning Reduced-Order Models CFD

Join Our Team

We are always looking for talented and motivated researchers to join our team. If you are interested in our research areas and would like to contribute to our projects, please get in touch.

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Alumni

Coming Soon

Our alumni section is currently under development. Check back later to learn about the accomplished researchers who have been part of our team and their current endeavours.