Olivier Coutier-Delgosha

Associate Professor

  • Ph.D., 2001, Mechanical Engineering, Institut National Polytechnique de Grenoble (INPG)
  • MS, 1997, Mechanical Engineering, Institut National Polytechnique de Grenoble (INPG)
  • BS, 1997, Ecole Nationale Supérieure de l'Energie (previously ENSHMG)
  • 2017-present Virginia Tech Associate Professor Aerospace & Ocean Engineering
  • 2011–present Arts & Metiers ParisTech Full Professor Mechanical Engineering
  • 2014–2016 Laboratoire de Mécanique de Lille (UMR CNRS 8107) Director
  • 2010–2013 Laboratoire de Mécanique de Lille (UMR CNRS 8107) Deputy Director
  • 2008–2011 Arts & Metiers ParisTech Associate Professor, Mechanical Engineering
  • 2004–2008 Arts & Metiers ParisTech Assistant Professor, Mechanical Engineering

Fulbright Grant (12 months), Visiting professor at Johns Hopkins University, Department of Mechanical Engineering, 2014

Post-doctoral Grant awarded by the CNES (French Space Agency), 2002-2003

Research Grant from Ministry of Education and Research, 1999-2001

Refereed Journals: 39 publications, see the list on my personnal website

Conferences: 64 papers published in proceedings of international conferences

Chairman of the ISROMAC 16 & ISIMet joint conferences in 2016 (Honolulu, April 10-15 2016, 300 participants)

Chairman of the ISROMAC 17 & ISIMet 2 joint conferences in 2017 (Maui, December 16-21 2017, 400 participants expected)

Associate Editor for the Journal of Fluids Engineering between 2008 and 2017

Reviewer of 66 papers for the J. of Fluids Engineering, JFM, Physics of fluids, Computers and fluids, EJMB/Fluids, the Int. J. for Num. Methods in Fluids, Exp. Thermal and Fluid Science…

Referee or examinator in 23 committees of PhD defense since 2008

Modeling of cavitating flows: the objective is to improve the physical models (cavitation, turbulence) involved in CFD of cavitating flows, to account for their unsteady, turbulent and compressible character. Present work focuses on DNS and LES simulations of cavitating flows.

Physical mechanisms of unsteady hydrodynamic cavitation: this activity aims to improve the understanding of the large scale turbulent interactions between liquid and vapor, often by the development of original measurement techniques (recently fast X-ray imaging & LIF PIV).

Cavitating behavior of rotating machinery: this work focuses on cavitation in hydraulic systems and pumps, especially rocket engine turbopumps. I am currently the PI of a 400 k€ project funded by SNECMA, devoted to the analysis the effects of the pump geometry on the flow instabilities due to cavitation, and the investigation of the internal flows in cavitating conditions.

Small-scale mechanisms: These topics are the most recent ones, in the scope of active efforts to include emerging applications of cavitation, associated with hot industrial concerns. Cavitation erosion and heat exchanges during phase changes are investigated in the scope of a NICOP ONR project (2016-19). A study of cavitation induced nano oil/water emulsion has been also initiated.

Environmental flows. Investigation of oil/water mixture behaviors in the scope of oil spilled in ocean or lakes has been initiated in the scope of my 1-year stay in Johns Hopkins University in 2014 as visiting Professor. More generally, oil spill introduces a broad range of problems related to environmental concerns, such as oil flows, mud flows and ground flows

Analysis of the effects of turbulence modeling on the numerical simulation of unsteady sheet cavitation

Mathematical derivation of the equations currently used in CFD of cavitation, with underlying assumptions including the notion of “two-phase fluid particle”.

Theoretical and numerical comparison of the existing cavitation models, showing how similar the models are, despite their various formulations.

Analysis of the stability of the preconditioned Navier-Stokes equations associated with a cavitation model.

Physical analysis of rotating cavitation in rocket engine inducers.

Coupling of CFD simulation and erosion model to predict the damage due to cavitation erosion.

Development and validation of fast X-ray imaging (including data acquisition, image post-processing and validation) for simultaneous measurement of void fraction and velocities in both phases. Analysis of the structure and dynamics of cavitating flows.

Investigation the internal structure of cavitation with an original endoscopic technique, analysis of the morphology of the mixture according to the void fraction.

Measurements of temperature variations in the liquid surrounding a cavitation bubble by IR thermography.

Measurement of the speed of sound in a cavitation homogeneous mixture and assessment of a good agreement with previous theoretical models.

First Direct Numerical Simulation (DNS) of cavitating flow… in 2018 !

  • (540) 231-3168
  • ocoutier@vt.edu
  • Aerospace & Ocean Engineering (MC0203)
    Randolph Hall, RM 332-A, Virginia Tech
    460 Old Turner St.
    Blacksburg, VA 24061