Education:

- Ph.D. 1974, Princeton University
- MA, MS, 1972, Princeton University
- MS, AEA, 1969, University of Sciences, Paris

Research Interests:

Multiphase Flow Phenomena, Fluid Behavior, Phase Change, Heat Transfer, Combustion, Numerical Techniques

Professional Experience:

**Current Positions**

- Senior Research Scientist, Jet Propulsion Laboratory
- Visiting Associate, Mechanical and Civil Engineering Department, Caltech

**Professional Society Memberships**

- American Institute of Aeronautics and Astronautics, Fellow since 2008
- American Society of Mechanical Engineers, Fellow since 1988
- The Combustion Institute
- Institute for Liquid Atomization and Spray Systems - North and South America

**Journal Editorial Service**

- ATOMIZATION AND SPRAYS, Editorial Board
- PROGRESS IN ENERGY AND COMBUSTION SCIENCE, Deputy Editor
- AIAA JOURNAL (1998-2004), Associate Editor

**Teaching**

- Lecturer at the California Institute of Technology, 1992-1993
- Chancellor’s Distinguished Lecturer at the University of California, Irvine, 1995-1996

Selected Awards:

- At JPL: 154 NASA Certificates of Recognition for best journal publications and conference proceedings within NASA, published as NASA Tech Briefs
- JPL Technology and Applications Program Exceptional Service Award, 1995
- At Princeton: Amelia Earhart Fellowship, 1971-74 (remains an Amelia Earhart Fellow)
- At the University of Sciences of Paris: Bourse du Troisième Cycle, 1968-69
- Marshall Award for the best paper from the Americas at ICLASS 2000
- JPL Mariner Award “For leadership in the field of multi-phase flow modeling”, 2010
- JPL Magellan Award for Excellence in Field of Knowledge with the citation “For the development of new Large Eddy Simulation methodologies”, 2014

Selected Publications:

**Refereed Journals**

- “A Theory of Turbulent Flame Development and Nitric Oxide Formation in Stratified Charge Internal Combustion Engines,” (J. Rosentweig and W. A. Sirignano), Combust. Sci. and Tech., 8, 51 68, 1973
- “Combustion and NO Formation in a Stratified Charge Engine: A Two Turbulent Equations Model,” (J. Rosentweig Bellan and W. A. Sirignano), Combust. Sci. and Tech., 12, 75 104, 1976
- “On the Quasi Steady Gas Phase Assumption for a Burning Droplet,” (J. Bellan and M. Summerfield), AIAA Journal, 14, 7, 973, 1976
- “Model for Studying Unsteady Droplet Combustion,” (J. Bellan and M. Summerfield), AIAA Journal, 15, 2, 234 242, 1977
- “Theoretical Examination of Assumptions Commonly Used for the Gas Phase Surrounding a Burning Droplet,” (J. Bellan, and M. Summerfield), Combust. and Flame, 33, 107 122, 1978
- “A Preliminary Theoretical Study of Droplet Extinction by Depressurization,” (J. Bellan and M. Summerfield), Combust. and Flame, 33, 257 270, 1978
- “Linear Finite element Numerical Techniques for Combustion Problems Requiring Variable Step Size,” (H. Sandusky, J. Bellan, T. J. Ohlemiller and R. Vichnevetsky), Combust. and Flame, 36, 193 196, 1979
- “A Model of Smoldering Combustion Applied to Flexible Polyurethane Foams,” (T. J. Ohlemiller, J. Bellan and F. Rogers), Combust. and Flame, 36, 197 215, 1979
- “A Theory of Non Dilute Spray Evaporation Based Upon Multiple Drop Interaction,” (J. Bellan and R. Cuffel), Combust. and Flame, 51, No. 1, 55 67, 1983
- “A New Approach to Soot Control in Diesel Engines by Fuel Drop Charging,” (J. Bellan), Combust. and Flame, 51, No. 1, 117 119, 1983
- “Fuel Composition Effects on High Temperature Corrosion in Industrial/Commercial Boilers and Furnaces: a Review,” (J. Bellan and S. Elghobashi), J. of Eng. for Gas Turbines and Power, 107, 744 757, 1985
- “Evaluation of the Importance of the Relative Velocity During Evaporation of Drops in Sprays,” (J. Bellan and K. Harstad), Int. J. Heat Mass Transfer, 29, 4, 647 651, 1986
- “Analysis of the Convective Evaporation of Non Dilute Sprays,” (J. Bellan and K. Harstad), Int. J. Heat Mass Transfer, 30, 1, 125 136, 1987
- “The Details of the Convective Evaporation of Dense and Dilute Clusters of Drops,” (J. Bellan and K. Harstad), Int. J. Heat Mass Transfer, 30, No. 6, 1083 1093, June, 1987
- “Ignition of Non Dilute Clusters of Drops in Convective Flows,” (J. Bellan and K. Harstad), Combust. Sci. and Tech., 53, 2 3, 75 92, 1987
- “A Simplified Description of Char Combustion,” (M. Loewenberg, J. Bellan and G. R. Gavalas), Chem. Eng. Comm., 58, 89 103, 1987
- “Turbulence Effects During Evaporation of Drops in Clusters,” (J. Bellan and K. Harstad), Int. J. Heat Mass Transfer, 31, 8, 1655 1668, 1988
- “Electrostatic Dispersion of Drops in Clusters,” (K. Harstad and J. Bellan), Combust. Sci. and Tech., 63, 4-6, 169-181, 1989
- “Transport Related Phenomena for Clusters of Drops,” (J. Bellan and K. Harstad), Int. J. Heat Mass Transfer, 32, 10, 2000-2002, 1989
- “Evaporation, Ignition and Combustion of Non Dilute Clusters of Drops,” (J. Bellan and K. Harstad), Combust. and Flame, 79, 272-286, 1990
- “The Dynamics of Dense and Dilute Clusters of Drop Evaporating in Large, Coherent Vortices,” (J. Bellan and K. Harstad), Proc. of the Combustion Institute, Vol. 23, 1375-1381, 1990
- “A Model of the Evaporation of Binary-Fuel Clusters of Drops,” (K. Harstad and J. Bellan), Atomization and Sprays, 1, 367-388, 1991
- “Unsteady Evaporation and Combustion of a Drop Cloud Inside a Vortex,” (F. Fichot, K. Harstad and J. Bellan), Combust. and Flame, 98, 5-11, 1994
- “Entrainment and Evaporation of Drops in the Laminar Part of a Two-Dimensional Developing Mixing Layer,” (F. Fichot, J. Bellan and K. Harstad), Proc. of the Combustion Institute, Vol. 25, 397-405, 1994
- “Steady Injection of Identical Clusters of Evaporating Drops Embedded in Jet Vortices,” (J. Bellan and K. Harstad), Atomization and Sprays, 5(1), 1-16, 1995
- “Unsteady Injection of Sequences of Drop Clusters in Vortices Depicting Portions of a Spray,” (J. Bellan and K. Harstad), Atomization and Sprays, 5(1), 17-44, 1995
- “Ignition of a Binary-Fuel (Solvent-Solute) Cluster of Drops”, (J. Bellan and K. Harstad), Combust. Sci. and Tech., 110-111, 531-548, 1995
- “Analysis of Reaction Products and Conversion Time in the Pyrolysis of Cellulose and Wood Particles”, (R. S. Miller and J. Bellan), Combust. Sci. and Tech., 119, 331-373, 1996
- “External Cluster Combustion of Binary-Fuel Drops”, (J. Bellan), Combust. Sci. and Tech., 120, 213-236, 1996
- “Electrostatic Dispersion and Evaporation of Clusters of Drops of High-Energy Fuel for Soot Control”, (J. Bellan and K. Harstad), Proc. of the Combustion Institute, Vol. 26, 1713-1722, 1996
- “Behavior of a Polydisperse Cluster of Interacting Drops in an Inviscid Vortex”, (K. Harstad and J. Bellan), Int. J. of Multiphase Flow, 23(5), 899-925, 1997
- “Efficient High-Pressure State Equations”, (K. Harstad, R. S. Miller and J. Bellan), A.I.Ch.E. J., 43(6), 1605-1610, 1997
- “A Generalized Biomass Pyrolysis Model Based on Cellulose, Hemicellulose and Lignin Kinetics”, (R. S. Miller and J. Bellan), Combust. Sci. and Tech., 126(1-6), 97-138, 1997
- “Tar Yield and Collection from the Pyrolysis of Large Biomass Particles”, (R. S. Miller and J. Bellan), Combust. Sci. and Tech., 127(1-6), 97-118, 1997
- “Numerical Simulation of a Vortex Pyrolysis Reactor for Condensable Tar Production from Biomass”, (R. S. Miller and J. Bellan), Energy and Fuels, 12(1), 25-40, 1998
- “Isolated Liquid Oxygen Drop Behavior in Fluid Hydrogen at Rocket Chamber Pressures”, (K. Harstad and J. Bellan), Int. J Heat and Mass Transfer, 41, 3537-3550, 1998
- “Interactions of Liquid Oxygen Drops in Fluid Hydrogen at Rocket Chamber Pressures”, (K. Harstad and J. Bellan), Int. J Heat and Mass Transfer, 41, 3551-3558, 1998
- “Dispersion (Electrostatic/Mechanical) and Fuel Properties Effects on Soot Propensity in Clusters of Drops”, (J. Bellan and K. Harstad), Atomization and Sprays, 8, 601-624, 1998
- “Evaluation of Equilibrium and Non-Equilibrium Evaporation Models for Many Droplet Gas-Liquid Flow Simulations”, (R. S. Miller, K. Harstad and J. Bellan), Int. J. of Multiphase Flow, 24, 1025-1055, 1998
- “On the Validity of the Assumed PDF Method for Modeling Binary Mixing/Reaction of Evaporated Vapor in Gas/Liquid-Droplet Turbulent Shear Flow”, (R. S. Miller and J. Bellan), Proceedings of the Combustion Institute, Vol. 27, 1065-1072, 1998
- “High-Energy-Density Fuel Blending Strategies and Drop Dispersion for Fuel Cost Reduction and Soot Propensity Control”, (J. Bellan and K. Harstad), Atomization and Sprays, 9(4), 371-383,1999
- “Direct Numerical Simulation of a Confined Three-Dimensional Gas Mixing Layer with One Evaporating Hydrocarbon-Droplet Laden Stream”, (R. S. Miller and J. Bellan), J. Fluid Mech., 384, 293-338, 1999
- “The Lewis Number Under Supercritical Conditions”, (K. Harstad and J. Bellan), Int. J. Heat and Mass Transfer, 42, 961-970, 1999
- “Direct Numerical Simulation and Subgrid Analysis of a Transitional Droplet Laden Mixing Layer”, (R. S. Miller and J. Bellan), Physics of Fluids, 12(3), 650-671, 2000
- “An All-Pressure Fluid Drop Model Applied to a Binary Mixture: Heptane in Nitrogen”, (K. Harstad and J. Bellan), Int. J. of Multiphase Flow, 26(10), 1675-1706, 2000
- “A Priori Subgrid Analysis of Temporal Mixing Layers with Evaporating Droplets”, (Nora Okong’o and Josette Bellan), Physics of Fluids, 12(6), 1573-1591, 2000
- “Supercritical (and Subcritical) Fluid Behavior and Modeling: Drops, Streams, Shear and Mixing Layers, Jets and Sprays”, (J. Bellan), Progress in Energy and Combustion Science, 26(4-6), 329-366, 2000
- “Entropy Production of Emerging Turbulent Scales in a Temporal Supercritical n-Heptane/Nitrogen Three-Dimensional Mixing Layer”, (N. Okong’o and J. Bellan), Proceedings of the Combustion Institute, Vol. 28, 497-504, 2000
- “Modeling and Simulation of Bubbling Fluidized Beds Containing Particle Mixtures”, (D. Lathouwers and J. Bellan), Proceedings of the Combustion Institute, Vol. 28, 2297-2304, 2000
- “Perspectives on Large Eddy Simulations for Sprays: Issues and Solutions”, (J. Bellan), Atomization and Sprays, 10, 409-425, 2000
- “The d2 Variation for Isolated LOX Drops and Polydisperse Clusters in Hydrogen at High Temperature and Pressures”, (K. Harstad and J. Bellan), Combustion and Flame, 124, 535-550, 2001
- “Direct Numerical Simulations of Supercritical Fluid Mixing Layers Applied to Heptane – Nitrogen”, (R. S. Miller, K. Harstad and J. Bellan), J. Fluid Mech., 436, 1-39, 2001
- “Evaluation of commonly used assumptions for isolated and cluster heptane drops in nitrogen at all pressures”, (K. Harstad and J. Bellan), Combustion and Flame, 127 (1 – 2), 1861-1879, 2001
- “Modeling of Dense Gas-Solid Reactive Mixtures Applied to Biomass Pyrolysis in a Fluidized Bed”, (D. Lathouwers and J. Bellan), Int. Journal of Multiphase Flow, 27(12), 2155-2187, 2001
- “Yield Optimization and Scaling of Fluidized Beds for Tar Production from Biomass”, (D. Lathouwers and J. Bellan), Energy and Fuels, 15(5), 1247-1262, 2001
- “Consistent Boundary Conditions for Multicomponent Real Gas Mixtures Based on Characteristic Waves”, (N. Okong’o and J. Bellan), Journal of Computational Physics, 176(2), 330-344, 2002
- “Direct Numerical Simulations of O2/H2 Temporal Mixing Layers under Supercritical Conditions”, (N. Okong’o, K. Harstad and J. Bellan), AIAA J., 40(5), 914-926, 2002
- “Direct Numerical Simulation of a Transitional Supercritical Mixing Layer: Heptane and Nitrogen”, (N. Okong’o and J. Bellan), Journal of Fluid Mechanics, 464, 1-34, 2002
- “Direct Numerical Simulations of Two-phase Laminar Jet Flows with Different Cross-Section Injection Geometries”, (H. Abdel-Hameed and J. Bellan), Phys. Fluids, 14(10), 3655-3674, 2002
- “A posteriori assessment of assumptions used in the modeling of dense reactive granular flows”, (D. Lathouwers and J. Bellan), Combustion and Flame, 131(3), 353-356, 2002
- “On decoupling of Shvab-Zel’dovich variables in the presence of diffusion”, (Lam, S. H. and Bellan, J.), Combustion and Flame, 132(4), 691-696, 2003
- “A statistical model of multicomponent-fuel drop evaporation for many-droplet gas-liquid flow simulations”, (K. G. Harstad, P. C. Le Clercq and J. Bellan), AIAA J., 41(10), 1858-1874, 2003
- “Real-gas effects on mean flow and temporal stability of binary-species mixing layers”, (N. Okong’o and J. Bellan), AIAA J., 41(12), 2429-2443, 2003
- “Consistent Large Eddy Simulation of a temporal mixing layer laden with evaporating drops. Part 1: Direct Numerical Simulation, formulation and a priori analysis”, (N. Okong’o and J. Bellan), J. Fluid Mech., 499, 1-47, 2004
- “High-Pressure Binary Mass-Diffusion Coefficients for Combustion Applications”, (K. Harstad and J. Bellan), Ind. & Eng. Chem. Res., 43(2), 645-654, 2004
- “Mixing rules for multicomponent mixture mass diffusion coefficients and thermal diffusion factors”, (K. G. Harstad and J. Bellan), Journal of Chemical Physics, 120(12), 5664-5673, 2004
- “Modeling evaporation of Jet A, JP-7 and RP-1 drops at 1 to 15 bars”, (K. G. Harstad and J. Bellan), Combustion and Flame, 137(1-2), 163-177, 2004
- “Perturbation and initial Reynolds number effects on transition attainment of supercritical mixing layers”, (N. Okong’o and J. Bellan), Computers & Fluids, 33(8), 1023-1046, 2004
- “Turbulence and fluid-front area production in binary-species, supercritical, transitional mixing layers”, (N. Okong’o and J. Bellan), Phys. Fluids, 16(5), 1467-1492, 2004
- “Direct numerical simulation of a transitional temporal mixing layer laden with multicomponent-fuel evaporating drops using continuous thermodynamics”, (P. C. Le Clercq and J. Bellan), Phys. Fluids, 16(6), 1884-1907, 2004
- “Modeling of multicomponent homogeneous nucleation utilizing continuous thermodynamics”, (K. G. Harstad and J. Bellan), Combustion and Flame, 139(3), 252-262, 2004
- “Modeling of multicomponent-fuel drop-laden mixing layers having a multitude of species”, (P. C. Le Clercq and J. Bellan), Proceedings of the Combustion Institute, 30, 2007-2015, 2005
- “Consistent Large Eddy Simulation of a temporal mixing layer laden with evaporating drops. Part 2: A posteriori modeling”, (A. Leboissetier, N. Okong’o and J. Bellan), J. Fluid Mech., 523, 37-78, 2005
- “Direct numerical simulation of gaseous mixing layers laden with multicomponent-liquid drops: Liquid-specific effects”, (P. C. Le Clercq and J. Bellan), J. Fluid Mech., 533, 57-94; 540, 439; 2005
- “Theory, modeling and analysis of turbulent supercritical mixing”, (J. Bellan), Combustion Science and Technology, 178, 253-281, 2006
- “Global analysis and parametric dependencies for potential hydrogen-fuel unintended releases”, (K. Harstad and J. Bellan), Combustion and Flame, 144, 89-102, 2006
- “On possible release of microbe-containing particulates from a Mars lander spacecraft”, (K. Harstad and J. Bellan), Planetary and Space Science, 54, 273-286, 2006
- “Scalar dissipation modeling for passive and active scalars: a priori study using Direct Numerical Simulation”, (L. C. Selle and J. Bellan), Proc. Comb. Inst., 31, 1665-1673, 2007
- “Evaluation of assumed-PDF methods in two-phase flows using Direct Numerical Simulation”, (L. C. Selle and J. Bellan), Proc. Comb. Inst., 31, 2273-2281, 2007
- “Characteristics of transitional multicomponent gaseous and drop-laden mixing layers from Direct Numerical Simulation: Composition effects”, (L. C. Selle and J. Bellan), Phys. Fluids, 19(6), doi: 10.1063/1.2734997, 063301- 1-33, 2007
- “Modeling of subgrid scale phenomena in supercritical transitional mixing layers: an a priori study”, (L. C. Selle, N. A. Okong’o, J. Bellan and K. G. Harstad), J. Fluid Mech., 593, 57-91, 2007
- “Detailed Characteristics of Drop-Laden Mixing Layers: LES Predictions compared to DNS”, (N. Okong’o, A. Leboissetier and J. Bellan), Physics of Fluids, 20(10), 103305 (16 pages), 2008
- “Large Eddy Simulation composition equations for single-phase and two-phase fully multicomponent flows”, (J. Bellan and L. C. Selle), Proc. Combust. Inst., 32, doi:10.1016/j.proci.2008.06.005, 2009
- “A posteriori study using a DNS database describing fluid disintegration and binary-species mixing under supercritical pressure: Heptane and Nitrogen”, (E. S. Taskinoglu and J. Bellan), J. Fluid Mech., 645, 211-254, 2010
- “Small-scale dissipation in binary-species, thermodynamically supercritical, transitional mixing layers”, (N. Okong’o and J. Bellan), Computers and Fluids, 39, 1112-1124, 2010
- “A model of reduced kinetics for alkane oxidation using constituents and species: proof of concept for n-heptane”, (K. G. Harstad and J. Bellan), Combustion and Flame, 157, 1594-1609, 2010
- "A model of reduced oxidation kinetics using constituents and species: iso-octane and its mixtures with n-pentane, iso-hexane and n-heptane”, (K. G. Harstad and J. Bellan), Combustion and Flame, 157, 2184-2197, 2010.
- “Subgrid scale models and Large Eddy Simulation of oxygen stream disintegration and mixing with a hydrogen or helium stream at supercritical pressure”, (E. S. Taskinoglu and J. Bellan), J. Fluid Mech., 679, 156-193, 2011.
- “The subgrid-scale scalar variance under supercritical pressure conditions”, (E. Masi and J. Bellan), Phys. Fluids, 23(8), doi:085101 (22 pages), 2011.
- “A new formulation of the Large Eddy Simulation composition equations for two-phase fully-multicomponent turbulent flows”, (M. R. Gloor and J. Bellan), Computers and Fluids, 50, 94-103, 2011.
- “Spray control for maximizing energy efficiency and reducing emission in combustion engines”, ( N. Chigier, W. Bachalo, R. Reitz, J. Bellan and M. Herrmann), Atomization and Sprays, 21(7), 553-574, 2011.
- “Influence of computational drop representation in LES of a mixing layer with evaporating drops”, (S. Radhakrishnan and J. Bellan), Computers and Fluids, 58, 15-26, 2012.
- “Explicit filtering to obtain grid-spacing independent and discretization-order independent Large Eddy Simulation of compressible single-phase flow”, (S. Radhakrishnan and J. Bellan), J. Fluid Mech., 697, 399-435, 2012.
- “Explicit filtering to obtain grid-spacing independent and discretization-order independent Large Eddy Simulation of two-phase volumetrically-dilute flow with evaporation”, (S. Radhakrishnan and J. Bellan), J. Fluid Mech., 719, 230-267, 2013.
- “Multi-species turbulent mixing under supercritical-pressure conditions: modeling, Direct Numerical Simulation and analysis revealing species spinodal decomposition”, ( E. Masi, J. Bellan, K. Harstad and N. Okong’o), J. Fluid Mech., 721, 578-626, 2013.
- “Prediction of premixed, heptane and iso-octane jet flames using a reduced kinetic model based on constituents and species”, (K. Harstad and J. Bellan), Combust. Flame, 160, 2404-2421, 2013
- “Heavy-alkane oxidation kinetic-mechanism reduction using dominant dynamic variables, self similarity and chemistry tabulation”, (P. D. Kourdis and J. Bellan), Comb. Flame, 161, 1196-1223, 2014
- “Irreversible entropy production rate in high-pressure turbulent reactive flows”, (G. Borghesi and J. Bellan), Proc. of the Comb. Inst., doi. 10.1016/j.proci.2014.05.016, 2014
- “Models for the Large Eddy Simulation equations to describe multi-species mixing occurring at supercritical pressure”, (G. Borghesi and J. Bellan), Int. J. Energ. Mat. Chem. Prop., doi.10.1615/IntJEnergeticMaterialsChemProp.2014011313
- “High-pressure reduced-kinetics mechanism for n-hexadecane autoignition and oxidation at constant pressure”, (P. D. Kourdis and J. Bellan), Combust. Flame., doi.10.1016/j.combustflame.2014.09.008

**Book Chapters**

- Liquid Drop Behavior in Dense and Dilute Clusters (J. Bellan), Numerical Approaches to Combustion Modeling, Chapter 18, Eds. Oran E. S. and Boris, J. P., AIAA Progress Series, A. Richard Seebass, Editor-in-Chief, Vol. 135, 547-583, 1991.
- Dynamics and Thermodynamics of Dense and Dilute Clusters of Drops (J. Bellan), Proceedings of the IUTAM Symposium on the Mechanics and Combustion of Droplets and Sprays, Dec. 6-10, 1994, Taiwan, Eds. Chigier, N. A. and Chiu, H. H., 177-194, 1994
- The Fundamentals of Drop Dynamics and Evaporation in Dense and Dilute Clusters of Drops Embedded into Vortices (J. Bellan), Recent Advances in Spray Combustion: Spray Atomization and Drop Burning. Vol. 1, Chapter 15, Ed. K. K. Kuo, AIAA Progress Series Vol. 166, 381-397, 1996
- Characteristics of Supercritical Transitional Temporal Mixing Layers (N. Okong’o and J. Bellan), Proceedings IUTAM Symposium on Turbulent Mixing and Combustion, Kingston, Canada, June 3-6 2001, Eds. Pollard, A. and Candel S., Kluwer Academic Press, Dortrecht, 59-71, 2002.
- Droplet Cluster Behavior in Dense and Dilute Regions (J. Bellan), Liquid Rocket Thrust Chambers: Aspects of Modeling, Analysis and Design, (Eds. Yang, V., Habiballah, M. and Popp, M.), AIAA Progress Series, Vol. 200, Chapter 8, 323-338, 2005.
- Direct and Large Eddy Simulation of Two-Phase Flows with Evaporation (J. Bellan), Direct and Large Eddy Simulations 8 (Ed. Hans Kuerten), ERCOFTAC, Springer Verlag, 2011.

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