Bertrand Rollin

Assistant Professor of Aerospace Engineering
Aerospace Engineering Department
Daytona College of Engineering
Daytona Beach campus

Dr. Bertrand Rollin received his Ph.D. in Mechanical Engineering from the University of Vermont, studying the behavior of small scales of turbulence, and the interplay between passive scalar transport and flow topology.

Upon completion of his Ph.D., Dr. Rollin joined Los Alamos National Laboratory as postdoctoral research associate. His research led to the development of a model for Rayleigh-Taylor & Richtmyer-Meshkov instabilities, and a new initialization strategy for RANS simulations of instability-driven turbulent material mixing.

More recently, Dr. Rollin was a Research Faculty at the DoE PSAAP-II Center for Compressible Multiphase Turbulence (CCMT). As the leader of the Macroscale and Mesoscale simulations team, his research effort has focused on solving a problem of explosive dispersal of particles at an unprecedented level of physical details, thereby contributing to progress towards predictive simulation of multiphase flows under extreme conditions.

Dr Rollin’s research interests consist of the physics and computational modeling associated with turbulence, mixing, multiphase flows, compressible flows, and reactive flows.

Dr. Rollin is a private pilot and a rescue scuba diver.


  • Ph.D. - Doctor of Philosophy in Mechanical Engineering, University of Vermont

Book Chapters

1. N.A. Denissen, B. Rollin, J.M. Reisner and M.J. Andrews, “Rayleigh-Taylor Driven Turbulence” in Coarse Grained Simulation and Turbulent Mixing by Dr. F. Grinstein, Cambridge University Press, to be published.

Peer Reviewed Journal Articles

2. S. Annamalai, B. Rollin, C. Neal, F. Ouellet, T.J. Jackson, and S. Balachandar, “Effects of Initial Perturbations in the Early Moments of an Explosive Dispersal of Particles”, Journal of Fluids Engineering, accepted.

3. N.A. Denissen, B. Rollin, J.M. Reisner and M.J. Andrews, “The Tilted Rocket Rig: A Test Case for RANS Models”, Journal of Fluids Engineering: Special issue for the 13th IWPCTM, (2014).

4. B. Rollin and M. J. Andrews, “On Generating Initial Conditions for Turbulence Models: the Case of Rayleigh-Taylor Instability Turbulent Mixing”, Journal of Turbulence, 14, 77-106 (2013).

5. B. Rollin and M. J. Andrews, “Mathematical Model of Rayleigh-Taylor and Richtmyer-Meshkov Instabilities for Viscoelastic Fluids”, Physical Review E, 83, 046371 (2011).

6. B. Rollin, Y. Dubief and C.R. Doering, “Variation on the Kolmogorov Flow: Asymptotic Dissipation Rate Driven by Harmonic Forcing”, Journal of Fluid Mechanics, 670, 204-213 (2011).

7. G. Legros, A. Fuentes, B. Rollin, P. Joulain, J.P. Vantelon, and J.L. Torero, “Extinction simulation of diffusion flame established in microgravity”, Journal of the Energy Institute, 79, 207-211 (2006).

Refereed Conference Proceedings

8. F. Ouellet, S. Annamalai, and B. Rollin, “Effect of a Bimodal Initial Particle Volume Fraction Perturbation in an Explosive Dispersal of Particles”, Proceedings of the 19th Biennial APS Conference on Shock Compression of Condensed Matter, in revision.

9. B. Rollin, N.A. Denissen, J.M. Reisner and M.J. Andrews, “Application of a Novel Approach for Turbulence Model Initialization: Preliminary Results”, Proceedings of the 43rd AIAA Fluid Dynamics Conference and Exhibit, DOI: 10.2514/6.2013-2485 (2013).

10. N.A. Denissen, B. Rollin, J.M. Reisner and M.J. Andrews, “Modeling Turbulent Rayleigh-Taylor Mixing with Dynamic Interfaces”, Proceedings of the 43rd AIAA Fluid Dynamics Conference and Exhibit, DOI: 10.2514/6.2013-2487 (2013).

11. B. Rollin, N. A. Denissen, J. M. Reisner and M. J. Andrews, “Simulations of the Tilted Rig Experiment Using the xRage and FLAG Hydrocodes”, IMECE2012-93094, Houston, TX (2012).

12. B. Rollin, N. A. Denissen, and M. J. Andrews, “Simulations of the Tilted Rig Experiment”, FEDSM2012-72320, San Juan, PR (2012).

13. B. Rollin and M. J. Andrews, “An Appropriate Metric to Switch on a Turbulence Model for Rayleigh-Taylor Instability Driven Mixing”, AJK2011-16017, Hamamatsu, Japan (2011).

14. B. Rollin and M. J. Andrews, “On Specification of Initial Conditions in Turbulence Models”, Proceedings of the 12th IWPCTM, Moscow, Russia (2010).

15. B. Rollin and M. J. Andrews, “On the ’Early-Time’ Evolution of Variables Relevant to Turbulence Models for the Rayleigh-Taylor Instability”, FEDSM-ICNMM2010-30556, Montreal, Quebec, Canada (2010).

Non-Refereed Conference Proceedings

16. N. A. Denissen, B. Rollin, J. M. Reisner, J. Fung and M. J. Andrews, “Modeling Turbulent Mixing with Dynamic Interfaces in ASC Codes”, Proceedings of NECDC 2012, Lawrence Livermore National Laboratory, Livermore, CA (2013).

Other Publications

17. B. Rollin, N. A. Denissen, J. M. Reisner, M. J. Andrews and J. Fung, “Turbulence Model Validation for Complex Mixing Scenarios”, ADTSC Science Highlights (2013).

18. B. Rollin and M. J. Andrews, “About Turbulence Model Coefficients Profiles for the Rayleigh-Taylor Instability”, ADTSC Science Highlights (2011).

19. B. Rollin and M. J. Andrews, “On the Prediction of Initial Turbulent Kinetic Energy Profile in Rayleigh-Taylor Instability”, ADTSC Science Highlights (2010).

20. B. Rollin, “On the Influence of Large Scale Forcing and Flow Topology on the Dynamics of Small-Scale Turbulent Transport”, Ph.D. dissertation, The University of Vermont (2008).

PRESENTATIONS

Invited Presentations

1. B. Rollin, “Toward Predictive Complex Flow Simulations”, invited seminar, Embry-Riddle Aeronautical University (2015).

2. B. Rollin, “Application of a Novel Approach for Turbulence Model Initialization”, invited seminar, Embry-Riddle Aeronautical University (2013).

3. B. Rollin, “Update on the Modal Model for Instability Development”, invited seminar, CoMuEx, LANL (2013).

4. B. Rollin, and M.J. Andrews, “On the Effect of Initial Velocity Field and Phase Shifting of an Initial Binary Perturbation for Rayleigh-Taylor Instability”, invited poster presentation, IMA Annual Program Year Workshop: Transport and Mixing in Complex and Turbulent Flows (2010).

5. B. Rollin, “On the Influence of Large Scale Forcing and Flow Topology on the Dynamics of Small-Scale Turbulent Transport”, invited seminar, Los Alamos National Laboratory (2009).

Conference Presentations

5. B. Rollin, S. Annamalai, F. Ouellet, “A Study of Interfacial Instability in Explosive Dispersal of Particles”, 19th Biennial APS Conference on Shock Compression of Condensed Matter, Tampa, FL (2015).

6. B. Rollin, S. Annamalai, C. Neal, T.J. Jackson, and S. Balachandar, “Numerical Study of Explosive Dispersal of Particles”, DFD2014, Bulletin of the American Physical Society, Vol. 59, No. 20, p. 267 (2014).

7. B. Rollin, N.A. Denissen, and M.J. Andrews, “Coupling Particle Transport and RANS Turbulence Modeling”, ASME 2014 International Mechanical Engineering Congress and Exposition, Montreal, Canada (2014).

8. S. Annamalai, C. Neal, F. Ouellet, B. Rollin, T.J. Jackson, and S. Balachandar, “Numerical Simulation of Explosive Dispersal of Particles in Cylindrical Geometry”, IWPCTM 14, San Francisco, CA (2014).

9. B. Rollin, N.A. Denissen, J.M. Reisner and M.J. Andrews, “Comparison Between Turbulence Model Initialization Approaches for Rayleigh-Taylor and Richtmyer-Meshkov Turbulent Mixing”, DFD2013, Bulletin of the American Physical Society, Vol. 58, No. 18, (2013).

10. B. Rollin, N.A. Denissen, J.M. Reisner and M.J. Andrews, “Application of a Novel Approach for Turbulence Model Initialization”, 43rd AIAA Fluid Dynamics Conference and Exhibit, San Diego, CA (2013).

11. N.A. Denissen, B. Rollin, J.M. Reisner and M.J. Andrews, “Modeling Turbulent Rayleigh-Taylor Mixing with Dynamic Interfaces”, 43rd AIAA Fluid Dynamics Conference and Exhibit, San Diego, CA (2013).

12. B. Rollin, N.A. Denissen, J.M. Reisner, and M.J. Andrews, “Large Eddy Simulations of the Tilted Rig Experiment: A Two-Dimensional Rayleigh-Taylor Case,” DFD2012, Bulletin of the American Physical Society, Vol. 57, No. 17, p. 267 (2012).

13. N.A. Denissen, B. Rollin, J.M. Reisner and M.J. Andrews, “RANS Simulations of the Tilted Rig Experiment: A Two-Dimensional Rayleigh-Taylor Case,” DFD2012, Bulletin of the American Physical Society, Vol. 57, No. 17, p. 267 (2012).

14. B. Rollin, N. A. Denissen, J. M. Reisner and M. J. Andrews, “Simulations of the Tilted Rig Experiment Using the xRage and FLAG Hydrocodes”, ASME 2012 International Mechanical Engineering Congress and Exposition, Houston, TX (2012).

15. B. Rollin, and M.J. Andrews, “Turbulence by Design: How to Initialize a Turbulence Model in the Case of the Rayleigh-Taylor Instability”, IWPCTM 13, Bedfordshire, UK (2012).

16. J. M. Reisner, M. J. Andrews, N. A. Denissen and B. Rollin, “The Tilted Rocket Rig: A Test Case for Los Alamos Models”, IWPCTM 13, Bedfordshire, UK (2012).

17. N. A. Denissen, J. M. Reisner, M. J. Andrews, J. Fung and B. Rollin, “Rayleigh-Taylor Mixing with a 2D Interface Using the xRAGE and FLAG Hydrocodes”, ICNMMF, PennState, PA (2012).

18. B. Rollin, and M.J. Andrews, “On Accounting for Initial Conditions in Models of Rayleigh-Taylor Turbulent Mixing”, American Physical Society Division of Fluid Dynamics 2011, Bulletin of the American Physical Society, G19.9 (2011).

19. B. Rollin and M. J. Andrews, “Nonlinear Model for Mixing Layer Growth of Multimode Rayleigh-Taylor Instability”, Turbulent Mixing and Beyond Third International Conference, Trieste, Italy (2011).

20. B. Rollin and M. J. Andrews, “An Appropriate Metric to Switch on a Turbulence Model for Rayleigh-Taylor Instability Driven Mixing”, ASME-JSME-KSME Joint Fluids Engineering Conference (2011).

21. B. Rollin, and M.J. Andrews, “On Initial Conditions for Turbulent Rayleigh-Taylor Mixing”, American Physical Society Division of Fluid Dynamics 2010, Bulletin of the American Physical Society 55, CW 9 (2010).

22. B. Rollin, and M.J. Andrews, “On the ’Early-Time’ Evolution of Variables Relevant to Turbulence Models for the Rayleigh-Taylor Instability”, ASME 2010 3rd US-European Fluids Engineering Summer Meeting, Montreal, Quebec, Canada (2010).

23. B. Rollin, and M.J. Andrews, “On Specification of Initial Conditions in Turbulence Models”, 12th International Workshop on the Physics of Compressible Turbulent Mixing, Moscow, Russia (2010).

24. B. Rollin, and M.J. Andrews, “Progress Toward Specifying Initial Conditions for Variable Density Turbulence Models”, American Physical Society Division of Fluid Dynamics 2009, Bulletin of the American Physical Society 54, EB 5 (2009).

25. B. Rollin, and Y. Dubief, “Investigation of Large Fluctuations of Scalar Dissipation Related to Coherent Vortices and Flow Topology”, American Physical Society Division of Fluid Dynamics 2007, Bulletin of the American Physical Society 52, GS 2 (2007).

26. B. Rollin, and Y. Dubief, “Spatio-Temporal Investigation of the Scalar Gradients in Correlation to the Local Topology of a Turbulent Flow”, Turbulence Mixing and Beyond - International Conference, Trieste, Italy (2007).

27. B. Rollin, and Y. Dubief, “Dynamics of Passive Scalar Gradients in a Turbulent Kolmogorov Flow”, American Physical Society Division of Fluid Dynamics 2006, Bulletin of the American Physical Society 51, LM 9 (2006).

Poster Presentations

28. B. Rollin, “Center for Compressible Multiphase Turbulence”, Stewardship Science Academic Programs (SSAP) Symposium, Santa Fe, NM (2015).

29. B. Rollin, and M.J. Andrews, “Turbulence by Design: How to Initialize a Turbulence Model in the Case of the Rayleigh-Taylor Instability”, 13th International Workshops on the Physics of Compressible Turbulent Mixing (IWPCTM 13), Bedfordshire, UK (2012).

30. N. A. Denissen, J. M. Reisner, M. J. Andrews, J. Fung and B. Rollin, “RANS Modeling of the Tilted Rayleigh-Taylor Instability”, 13th International Workshops on the Physics of Compressible Turbulent Mixing (IWPCTM 13), Bedfordshire, UK (2012).

31. B. Rollin, and M.J. Andrews, “A Turbulence Model Initialization Strategy for Rayleigh-Taylor Instability Mixing”, The International Conference on Numerical Methods in Multiphase Flows (ICNMMF), Pennsylvania State University, PA (2012).

32. B. Rollin, N. A. Denissen, J. M. Reisner, M. J. Andrews and J. Fung, “Simulations of the Tilted Rig Experiment using the xRage and FLAG Hydrocodes”, High Energy Density Plasmas and Fluids Capability Review, Los Alamos National Laboratory (2012).

33. B. Rollin, and M.J. Andrews, “On the Effect of Initial Velocity Field and Phase Shifting of an Initial Binary Perturbation for Rayleigh-Taylor Instability”, Los Alamos Postdoc Research Day, Los Alamos National Laboratory (2010).


  • American Institute of Aeronautics and Astronautics (AIAA)
  • American Physical Society (APS)
  • American Society of Mechanical Engineers (ASME)
  • Order of the Engineer