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Gbemeho Agbaglah

Biography

Assistant Professor, Wayne State University, Detroit, MI (2019-Present)

Postdoctoral Associate, University of Ottawa, Ottawa, ON (2016-2019)

Postdoctoral Associate, Cornell University, Ithaca, NY (2014-2016)

Postdoctoral Associate, University of Michigan, Ann Arbor, MI (2012-2014)

Education

Ph.D., Sorbonne Université - Paris 6, France (2012)

M.S., Sorbonne Université - Paris 6, France (2008)

M.S., Université de Lome, Togo (2006)

B.S.,  Université de Lome, Togo (2005)

Courses Taught

ME 5995 Numerical Methods for Engineering Applications

ME 7995 Introduction to Multiphase Flows

Research Interests

Hydrodynamic instabilities

Computational Fluid Dynamics (CFD)

Atomization

Drops and bubbles

Flow past bluff bodies

Research Projects

Project title: Atomization of a liquid layer: flapping, hole formation and disintegration of thin liquid sheets.

Project leader: Dr. G. Gilou Agbaglah (gilou.agbaglah@wayne.edu)

Time period: Starting winter 2019

A PhD student position in the field of CFD code development, multiphase flow and aerodynamics. Candidates should be motivated and dedicated to scientic research with academic excellence. Background on incompressible  flow, CFD algorithm and code development, propulsion is desirable. The position will be fully-funded including tuition and a stipend. Interested candidates should send their CV, unofficial transcript to Dr. Gilou Agbaglah: gilou.agbaglah@wayne.edu.

Short summary:

The breakup of a liquid stream into small droplets, commonly refer to as atomization, is important in many industrial applications such as combustion, pesticide spraying, fuel injection systems, cooling and the dispersal of biological agents. In advanced gas-turbine engines and other industrial burners, it is desirable to produce small liquid-fuel drops in order to increase evaporation and mixing rates. By clearly understanding mechanisms leading to the liquid atomization, it will be possible to accurately predict and control the resulting spray characteristics, namely the droplets size and distribution. This project aims to provide an exhaustive explanation of physical phenomena observed in liquid atomization and to characterize the resulting spray.

The goal of the research is to reveal and characterize the role played by the apping of wave sheets in the breakup process and the conditions leading to hole formation and disintegration of thin liquid sheets. Computational analysis and theoretical approaches will be combing to provide predictions of the resulting spray. The efficacy and accuracy of three-dimensional Navier-Stokes numerical simulations in the case of a large density ratio, typical of a realistic air/water system, will be improved through the combination of different numerical methods, such as adaptive methods, fast and robust interface tracking methods and Van der Waals equations to model the dynamics of very thin liquid sheets that cannot be undertaken by any reasonable spatial resolution. The research will enable a unique insight into the details of local  flow fields leading to hole formation and disintegration which traditionally has not been possible to measure in experiments due to the time and spatial scales involved.

Papers and Conferences

 G. Agbaglah and C. Mavriplis (2019) “Three-dimensional wakes behind cylinders of square and circular cross-section: early and long-time dynamics”, J. Fluid Mech, 2019, doi:10.1017/jfm.2019.265.

N. Chalmers, G. Agbaglah, M. Chrust and C. Mavriplis (2019) “A Parallel hp-adaptive high order discontinuous Galerkin method for the incompressible Navier-Stokes equations”, Journal of Computational Physics: X, Volume 2, 2019, 100023.

G. Agbaglah and C. Mavriplis (2017) “Computational analysis of physical mechanisms at the onset of three-dimensionality in the wake of a square cylinder”, J. Fluid Mech. vol. 833, pp. 631-647.

G. Agbaglah, R. Chiodi and O. Desjardins (2016) “Numerical simulation of the initial destabilization of an air-blasted liquid layer”, J. Fluid Mech. Vol. 812, pp. 1024-1038.

G. Agbaglah, M.-J. Thoraval, S. T. Thoroddsen, L. V. Zhang, K. Fezzaa, R. D. Deegan (2015) “Drop impact into a deep pool: vortex shedding and jet formation”, J. Fluid Mech. 764, R1 doi:10.1017/jfm.2014.723.

G. Agbaglah, R. D. Deegan (2014) “Growth and instabilty of the liquid rim in the crown splash regime”, J. Fluid Mech. Vol. 752, pp. 485-496.

G. Agbaglah, C. Josserand and S. Zaleski (2013) “Longitudinal instability of a liquid rim”, Phys. Fluids, 25: 022103.

L. Gordillo, G. Agbaglah, L. Duchemin, C. Josserand (2011) “Asymptotic behavior of a retracting two-dimensional fluid sheet”, Phys. Fluids 23, 122101.

G. Agbaglah, S. Delaux, D. Fuster, J. Hoepffner, C. Josserand, S. Popinet, P. Ray, R. Scardovelli and S. Zaleski (2011) “Parallel simulation of multiphase flows using octree adaptivity and the volume-of-fluid method”, C. R. Acad. Sci. Paris, 339, Pages 194-207.

D. Fuster, G. Agbaglah, C. Josserand, S. Popinet and S. Zaleski (2009) “Numerical Simulation Of Droplets, Bubbles And Waves: State Of The Art”, Fluid Dynamics Research. Vol. 41, pp 065001-065045