DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Understanding the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions

Abstract

A generalized framework for multi-component liquid injections is presented to understand and predict the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions. The analysis focuses on the thermodynamic structure and the immiscibility state of representative gas-liquid interfaces. The most modern form of Helmholtz energy mixture state equation is utilized which exhibits a unique and physically consistent behavior over the entire two-phase regime of fluid densities. It is combined with generalized models for non-linear gradient theory and for liquid injections to quantify multi-component two-phase interface structures in global thermal equilibrium. Then, the Helmholtz free energy is minimized which determines the interfacial species distribution as a consequence. This minimal free energy state is demonstrated to validate the underlying assumptions of classic two-phase theory and spray atomization. However, under certain engine-relevant conditions for which corroborating experimental data are presented, this requirement for interfacial thermal equilibrium becomes unsustainable. A rigorously derived probability density function quantifies the ability of the interface to develop internal spatial temperature gradients in the presence of significant temperature differences between injected liquid and ambient gas. Then, the interface can no longer be viewed as an isolated system at minimal free energy. Instead, the interfacial dynamics become intimatelymore » connected to those of the separated homogeneous phases. Hence, the interface transitions toward a state in local equilibrium whereupon it becomes a dense-fluid mixing layer. A new conceptual view of a transitional liquid injection process emerges from a transition time scale analysis. Close to the nozzle exit, the two-phase interface still remains largely intact and more classic two-phase processes prevail as a consequence. Further downstream, however, the transition to dense-fluid mixing generally occurs before the liquid length is reached. As a result, the significance of the presented modeling expressions is established by a direct comparison to a reduced model, which utilizes widely applied approximations but fundamentally fails to capture the physical complexity discussed in this paper.« less

Authors:
 [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Combustion Research Facility
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1249075
Alternate Identifier(s):
OSTI ID: 1303248
Report Number(s):
SAND-2016-2790J; SAND2016-7816J
Journal ID: ISSN 1070-6631; PHFLE6; 637597
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Fluids
Additional Journal Information:
Journal Volume: 28; Journal Issue: 4; Journal ID: ISSN 1070-6631
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Multicomponent; Gradient Theory; Supercritical; Spray atomization; Liquid injection

Citation Formats

Dahms, Rainer N. Understanding the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions. United States: N. p., 2016. Web. doi:10.1063/1.4946000.
Dahms, Rainer N. Understanding the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions. United States. https://doi.org/10.1063/1.4946000
Dahms, Rainer N. Tue . "Understanding the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions". United States. https://doi.org/10.1063/1.4946000. https://www.osti.gov/servlets/purl/1249075.
@article{osti_1249075,
title = {Understanding the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions},
author = {Dahms, Rainer N.},
abstractNote = {A generalized framework for multi-component liquid injections is presented to understand and predict the breakdown of classic two-phase theory and spray atomization at engine-relevant conditions. The analysis focuses on the thermodynamic structure and the immiscibility state of representative gas-liquid interfaces. The most modern form of Helmholtz energy mixture state equation is utilized which exhibits a unique and physically consistent behavior over the entire two-phase regime of fluid densities. It is combined with generalized models for non-linear gradient theory and for liquid injections to quantify multi-component two-phase interface structures in global thermal equilibrium. Then, the Helmholtz free energy is minimized which determines the interfacial species distribution as a consequence. This minimal free energy state is demonstrated to validate the underlying assumptions of classic two-phase theory and spray atomization. However, under certain engine-relevant conditions for which corroborating experimental data are presented, this requirement for interfacial thermal equilibrium becomes unsustainable. A rigorously derived probability density function quantifies the ability of the interface to develop internal spatial temperature gradients in the presence of significant temperature differences between injected liquid and ambient gas. Then, the interface can no longer be viewed as an isolated system at minimal free energy. Instead, the interfacial dynamics become intimately connected to those of the separated homogeneous phases. Hence, the interface transitions toward a state in local equilibrium whereupon it becomes a dense-fluid mixing layer. A new conceptual view of a transitional liquid injection process emerges from a transition time scale analysis. Close to the nozzle exit, the two-phase interface still remains largely intact and more classic two-phase processes prevail as a consequence. Further downstream, however, the transition to dense-fluid mixing generally occurs before the liquid length is reached. As a result, the significance of the presented modeling expressions is established by a direct comparison to a reduced model, which utilizes widely applied approximations but fundamentally fails to capture the physical complexity discussed in this paper.},
doi = {10.1063/1.4946000},
journal = {Physics of Fluids},
number = 4,
volume = 28,
place = {United States},
year = {Tue Apr 26 00:00:00 EDT 2016},
month = {Tue Apr 26 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Liquid Jet Instability and Atomization in a Coaxial Gas Stream
journal, January 2000


Structure and breakup properties of sprays
journal, December 1995


On spray formation
journal, January 1999


Modeling Primary Atomization
journal, January 2008


On the experimental investigation on primary atomization of liquid streams
journal, June 2008


An accurate conservative level set/ghost fluid method for simulating turbulent atomization
journal, September 2008

  • Desjardins, Olivier; Moureau, Vincent; Pitsch, Heinz
  • Journal of Computational Physics, Vol. 227, Issue 18
  • DOI: 10.1016/j.jcp.2008.05.027

Theory of Particle Combustion at High Pressures
journal, November 1959


Fuel droplet vaporization and spray combustion theory
journal, January 1983


Fluid Dynamics and Transport of Droplets and Sprays
journal, January 1999


Advances in droplet array combustion theory and modeling
journal, June 2014


Evaporation and combustion of sprays
journal, January 1983


Mixing, transport and combustion in sprays
journal, January 1987


Recent advances in droplet vaporization and combustion
journal, January 1982


Mechanism of atomization of a liquid jet
journal, January 1982


An Interactively Coupled CFD-Multi-Zone Approach to Model HCCI Combustion
journal, February 2009


A comprehensive modeling study of in-cylinder fluid flows in a high-swirl, light-duty optical diesel engine
journal, December 2014


Review of high efficiency and clean reactivity controlled compression ignition (RCCI) combustion in internal combustion engines
journal, February 2015


Effects of Real-Fluid Thermodynamics on High-Pressure Fuel Injection Processes
journal, April 2014

  • Oefelein, Joseph; Lacaze, Guilhem; Dahms, Rainer
  • SAE International Journal of Engines, Vol. 7, Issue 3
  • DOI: 10.4271/2014-01-1429

Detailed Modeling and Simulation of High-Pressure Fuel Injection Processes in Diesel Engines
journal, January 2012

  • Oefelein, Joseph; Dahms, Rainer; Lacaze, Guilhem
  • SAE International Journal of Engines, Vol. 5, Issue 3
  • DOI: 10.4271/2012-01-1258

Advanced gasoline engine development using optical diagnostics and numerical modeling
journal, January 2007


Invited Review: Combustion instability in spray-guided stratified-charge engines: A review
journal, February 2015

  • Fansler, Todd D.; Reuss, David L.; Sick, Volker
  • International Journal of Engine Research, Vol. 16, Issue 3
  • DOI: 10.1177/1468087414565675

Detailed chemistry flamelet modeling of mixed-mode combustion in spark-assisted HCCI engines
journal, January 2011


On the ignition and flame development in a spray-guided direct-injection spark-ignition engine
journal, January 2014


Pollutant formation modelling in natural gas SI engines using a level set based flamelet model
journal, February 2008

  • Dahms, R.; Peters, N.; Stanton, D. W.
  • International Journal of Engine Research, Vol. 9, Issue 1
  • DOI: 10.1243/14680874JER02107

Early flame propagation in a spark-ignition engine measured with quasi 4D-diagnostics
journal, January 2015


Detailed Simulations of Stratified Ignition and Combustion Processes in a Spray-Guided Gasoline Engine using the SparkCIMM/G-Equation Modeling Framework
journal, January 2012

  • Dahms, Rainer N.; Drake, Michael C.; Grover, Ronald O.
  • SAE International Journal of Engines, Vol. 5, Issue 2
  • DOI: 10.4271/2012-01-0132

In-Cylinder Flow and Fuel Spray Interactions in a Stratified Spray-Guided Gasoline Engine Investigated by High-Speed Laser Imaging Techniques
journal, September 2013


Modeling ignition phenomena in spray-guided spark-ignited engines
journal, January 2009


Understanding ignition processes in spray-guided gasoline engines using high-speed imaging and the extended spark-ignition model SparkCIMM
journal, November 2011


Simulation of pollutant formation in a gas-turbine combustor using unsteady flamelets
journal, January 1998


Large Eddy Simulations of gaseous flames in gas turbine combustion chambers
journal, December 2012

  • Gicquel, L. Y. M.; Staffelbach, G.; Poinsot, T.
  • Progress in Energy and Combustion Science, Vol. 38, Issue 6
  • DOI: 10.1016/j.pecs.2012.04.004

Large Eddy Simulation of combustion instabilities in a lean partially premixed swirled flame
journal, February 2012


Large-eddy simulation of spray combustion in a gas turbine combustor
journal, January 2014


LES evaluation of the effects of equivalence ratio fluctuations on the dynamic flame response in a real gas turbine combustion chamber
journal, January 2013

  • Hermeth, S.; Staffelbach, G.; Gicquel, L. Y. M.
  • Proceedings of the Combustion Institute, Vol. 34, Issue 2
  • DOI: 10.1016/j.proci.2012.07.013

Experimental study of industrial gas turbine flames including quantification of pressure influence on flow field, fuel/air premixing and flame shape
journal, October 2013


Injection and Mixing Processes in High-Pressure Liquid Oxygen/Gaseous Hydrogen Rocket Combustors
journal, September 2000

  • Mayer, W.; Schik, A.; Schaffler, M.
  • Journal of Propulsion and Power, Vol. 16, Issue 5
  • DOI: 10.2514/2.5647

Atomization and Breakup of Cryogenic Propellants Under High-Pressure Subcritical and Supercritical Conditions
journal, September 1998

  • Mayer, Wolfgang O. H.; Schik, Axel H. A.; Vielle, Bruno
  • Journal of Propulsion and Power, Vol. 14, Issue 5
  • DOI: 10.2514/2.5348

Propellant injection in a liquid oxygen/gaseous hydrogen rocket engine
journal, November 1996

  • Mayer, Wolfgang; Tamura, Hiroshi
  • Journal of Propulsion and Power, Vol. 12, Issue 6
  • DOI: 10.2514/3.24154

Recent Experimental Efforts on High-Pressure Supercritical Injection for Liquid Rockets and Their Implications
journal, January 2012

  • Chehroudi, Bruce
  • International Journal of Aerospace Engineering, Vol. 2012
  • DOI: 10.1155/2012/121802

Visual characteristics and initial growth rates of round cryogenic jets at subcritical and supercritical pressures
journal, February 2002

  • Chehroudi, B.; Talley, D.; Coy, E.
  • Physics of Fluids, Vol. 14, Issue 2
  • DOI: 10.1063/1.1430735

Structure and Dynamics of Cryogenic Flames at Supercritical Pressure
journal, January 2006

  • Candel*, S.; Juniper†, M.; Singla, G.
  • Combustion Science and Technology, Vol. 178, Issue 1-3
  • DOI: 10.1080/00102200500292530

Spreading Angle and Centerline Variation of Density of Supercritical Nitrogen jets
journal, January 2002


Injection of Fluids into Supercritical Environments
journal, January 2006

  • Oschwald*, M.; Smith, J. J.; Branam, R.
  • Combustion Science and Technology, Vol. 178, Issue 1-3
  • DOI: 10.1080/00102200500292464

Mass transfer and combustion in transcritical non-premixed counterflows
journal, January 2009


Theory, Modeling and Analysis of Turbulent Supercritical Mixing
journal, January 2006


Evaluation of commonly used assumptions for isolated and cluster heptane drops in nitrogen at all pressures
journal, October 2001


Measurement and Prediction of Interfacial Tension of Binary Mixtures
journal, January 2010

  • Nino-Amezquita, Oscar G.; Enders, Sabine; Jaeger, Philip T.
  • Industrial & Engineering Chemistry Research, Vol. 49, Issue 2
  • DOI: 10.1021/ie901209z

Surface tension measurement of fuels and alkanes at high pressure under different atmospheres
journal, May 2004


Understanding high-pressure gas-liquid interface phenomena in Diesel engines
journal, January 2013

  • Dahms, Rainer N.; Manin, Julien; Pickett, Lyle M.
  • Proceedings of the Combustion Institute, Vol. 34, Issue 1
  • DOI: 10.1016/j.proci.2012.06.169

On the transition between two-phase and single-phase interface dynamics in multicomponent fluids at supercritical pressures
journal, September 2013

  • Dahms, Rainer N.; Oefelein, Joseph C.
  • Physics of Fluids, Vol. 25, Issue 9
  • DOI: 10.1063/1.4820346

Evidence for supercritical mixing layers in the ECN Spray A
journal, January 2015

  • Falgout, Zachary; Rahm, Mattias; Wang, Zhenkan
  • Proceedings of the Combustion Institute, Vol. 35, Issue 2
  • DOI: 10.1016/j.proci.2014.06.109

Gas/fuel jet interfaces under high pressures and temperatures
journal, March 2016


Non-equilibrium gas–liquid interface dynamics in high-pressure liquid injection systems
journal, January 2015


Liquid jet breakup regimes at supercritical pressures
journal, October 2015


A Linear Gradient Theory Model for Calculating Interfacial Tensions of Mixtures
journal, September 1996

  • Zuo, You-Xiang; Stenby, Erling H.
  • Journal of Colloid and Interface Science, Vol. 182, Issue 1
  • DOI: 10.1006/jcis.1996.0443

A New Functional Form and New Fitting Techniques for Equations of State with Application to Pentafluoroethane (HFC-125)
journal, March 2005

  • Lemmon, Eric W.; Jacobsen, Richard T.
  • Journal of Physical and Chemical Reference Data, Vol. 34, Issue 1
  • DOI: 10.1063/1.1797813

A rigorous method for predicting the critical properties of multicomponent systems from an equation of state
journal, March 1977


The calculation of critical points
journal, September 1980


Numerical study of the transient vaporization of an oxygen droplet at sub- and super-critical conditions
journal, January 1993


The GERG-2008 Wide-Range Equation of State for Natural Gases and Other Mixtures: An Expansion of GERG-2004
journal, October 2012

  • Kunz, O.; Wagner, W.
  • Journal of Chemical & Engineering Data, Vol. 57, Issue 11
  • DOI: 10.1021/je300655b

Critical behavior in fluids and fluid mixtures
journal, January 1983


Dilute mixtures and solutions near critical points
journal, January 1986


Mean-field theories, their weaknesses and strength
journal, June 1999


Free Energy of a Nonuniform System. I. Interfacial Free Energy
journal, February 1958

  • Cahn, John W.; Hilliard, John E.
  • The Journal of Chemical Physics, Vol. 28, Issue 2
  • DOI: 10.1063/1.1744102

Gradient theory modeling of surface tension for pure fluids and binary mixtures
journal, June 2007


Modeling of the Surface Tension of Multicomponent Mixtures with the Gradient Theory of Fluid Interfaces
journal, April 2005

  • Miqueu, Christelle; Mendiboure, Bruno; Graciaa, Alain
  • Industrial & Engineering Chemistry Research, Vol. 44, Issue 9
  • DOI: 10.1021/ie049086l

Free-energy theory of inhomogeneous fluids
journal, September 1979


Dynamical density functional theory of gas–liquid nucleation
journal, April 1994

  • Talanquer, V.; Oxtoby, David W.
  • The Journal of Chemical Physics, Vol. 100, Issue 7
  • DOI: 10.1063/1.467183

Gas-liquid nucleation in a two dimensional system
journal, December 2008

  • Santra, Mantu; Chakrabarty, Suman; Bagchi, Biman
  • The Journal of Chemical Physics, Vol. 129, Issue 23
  • DOI: 10.1063/1.3037241

Nonclassical nucleation theory for the gas–liquid transition
journal, December 1988

  • Oxtoby, David W.; Evans, R.
  • The Journal of Chemical Physics, Vol. 89, Issue 12
  • DOI: 10.1063/1.455285

Free Energy of a Nonuniform System. II. Thermodynamic Basis
journal, May 1959

  • Cahn, John W.
  • The Journal of Chemical Physics, Vol. 30, Issue 5
  • DOI: 10.1063/1.1730145

Free Energy of a Nonuniform System. III. Nucleation in a Two‐Component Incompressible Fluid
journal, September 1959

  • Cahn, John W.; Hilliard, John E.
  • The Journal of Chemical Physics, Vol. 31, Issue 3
  • DOI: 10.1063/1.1730447

Interfacial properties of selected binary mixtures containing n-alkanes
journal, August 2009


Phase and interface behaviors in type-I and type-V Lennard-Jones mixtures: Theory and simulations
journal, July 2005

  • Mejía, Andrés; Pàmies, Josep C.; Duque, Daniel
  • The Journal of Chemical Physics, Vol. 123, Issue 3
  • DOI: 10.1063/1.1955529

Simultaneous Application of the Gradient Theory and Monte Carlo Molecular Simulation for the Investigation of Methane/Water Interfacial Properties
journal, August 2011

  • Miqueu, Christelle; Míguez, José M.; Piñeiro, Manuel M.
  • The Journal of Physical Chemistry B, Vol. 115, Issue 31
  • DOI: 10.1021/jp202276k

On the phase and interface behavior along the three-phase line of ternary Lennard-Jones mixtures: A collaborative approach based on square gradient theory and molecular dynamics simulations
journal, July 2014

  • Garrido, José Matías; Quinteros-Lama, Héctor; Piñeiro, Manuel M.
  • The Journal of Chemical Physics, Vol. 141, Issue 1
  • DOI: 10.1063/1.4885348

Semiempirical theory of surface tension of binary systems
journal, September 1980


Semiempirical theory of surface tensions of pure normal alkanes and alcohols
journal, November 1978


Modelling of the surface tension of binary and ternary mixtures with the gradient theory of fluid interfaces
journal, April 2004


Molecular theory of fluid interfaces
journal, December 1976


Molecular theory of surface tension
journal, May 1976

  • Yang, Arthur J. M.; Fleming, Paul D.; Gibbs, Julian H.
  • The Journal of Chemical Physics, Vol. 64, Issue 9
  • DOI: 10.1063/1.432687

Theoretical determination of the thickness of a liquid-vapour interface
journal, December 1978


Interfacial tension and spreading coefficient under reservoir conditions
journal, January 1998


Current status of droplet and liquid combustion
journal, January 1977


Supercritical (and subcritical) fluid behavior and modeling: drops, streams, shear and mixing layers, jets and sprays
journal, August 2000


Zur kinetischen Theorie der Brownschen Molekularbewegung und der Suspensionen
journal, January 1906


Bachelier
journal, May 2005

  • Bernstein, Jeremy
  • American Journal of Physics, Vol. 73, Issue 5
  • DOI: 10.1119/1.1848117

Free-path distribution and Knudsen-layer modeling for gaseous flows in the transition regime
journal, February 2015


Viscosity and slip velocity in gas flow in microchannels
journal, December 2005

  • Fichman, M.; Hetsroni, G.
  • Physics of Fluids, Vol. 17, Issue 12
  • DOI: 10.1063/1.2141960

An extended Navier-Stokes formulation for gas flows in the Knudsen layer near a wall
journal, September 2007


Molecular free path distribution in rarefied gases
journal, March 2011


Modeling of Knudsen Layer Effects in Micro/Nanoscale Gas Flows
journal, July 2011

  • Dongari, Nishanth; Zhang, Yonghao; Reese, Jason M.
  • Journal of Fluids Engineering, Vol. 133, Issue 7
  • DOI: 10.1115/1.4004364

Higher-order hydrodynamics: Extended Fick’s Law, evolution equation, and Bobylev’s instability
journal, January 2002

  • Jou, David; Casas-Vázquez, José; Madureira, Justino R.
  • The Journal of Chemical Physics, Vol. 116, Issue 4
  • DOI: 10.1063/1.1426416

Fractional Derivatives for Physicists and Engineers
book, January 2013


The mean free path of gas molecules in the transition r$eacute$gime
journal, May 1970


Chord‐length and free‐path distribution functions for many‐body systems
journal, April 1993

  • Lu, Binglin; Torquato, S.
  • The Journal of Chemical Physics, Vol. 98, Issue 8
  • DOI: 10.1063/1.464812

Lennard–Jones parameters for combustion and chemical kinetics modeling from full-dimensional intermolecular potentials
journal, January 2014


“Third-Body” collision efficiencies for combustion modeling: Hydrocarbons in atomic and diatomic baths
journal, January 2015

  • Jasper, Ahren W.; Oana, C. Melania; Miller, James A.
  • Proceedings of the Combustion Institute, Vol. 35, Issue 1
  • DOI: 10.1016/j.proci.2014.05.105

Constant surface tension simulations of lipid bilayers: The sensitivity of surface areas and compressibilities
journal, July 1999

  • Feller, Scott E.; Pastor, Richard W.
  • The Journal of Chemical Physics, Vol. 111, Issue 3
  • DOI: 10.1063/1.479313

Comparison of Diesel Spray Combustion in Different High-Temperature, High-Pressure Facilities
journal, August 2010

  • Pickett, Lyle M.; Genzale, Caroline L.; Bruneaux, Gilles
  • SAE International Journal of Engines, Vol. 3, Issue 2
  • DOI: 10.4271/2010-01-2106

Liquid Fuels and Propellants for Aerospace Propulsion: 1903-2003
journal, November 2003

  • Edwards, Tim
  • Journal of Propulsion and Power, Vol. 19, Issue 6
  • DOI: 10.2514/2.6946

Atomization and Dense-Fluid Breakup Regimes in Liquid Rocket Engines
journal, September 2015

  • Dahms, Rainer N.; Oefelein, Joseph C.
  • Journal of Propulsion and Power, Vol. 31, Issue 5
  • DOI: 10.2514/1.B35562

Atomic diffusion theory challenging the Cahn-Hilliard method
journal, October 2014


Transport properties for combustion modeling
journal, September 2011

  • Brown, Nancy J.; Bastien, Lucas A. J.; Price, Phillip N.
  • Progress in Energy and Combustion Science, Vol. 37, Issue 5
  • DOI: 10.1016/j.pecs.2010.12.001

First-principles binary diffusion coefficients for H, H 2 , and four normal alkanes + N 2
journal, September 2014

  • Jasper, Ahren W.; Kamarchik, Eugene; Miller, James A.
  • The Journal of Chemical Physics, Vol. 141, Issue 12
  • DOI: 10.1063/1.4896368

Mechanism of Atomization of a Liquid jet
journal, January 1995


Current status of droplet and liquid combustion
book, January 1979


Fluid Dynamics and Transport of Droplets and Sprays
journal, December 2000


Pollutant formation modelling in natural gas SI engines using a level set based flamelet model
text, January 2008


Works referencing / citing this record:

A critical assessment of the line tension determined by the modified Young’s equation
journal, August 2018

  • Zhang, Jun; Wang, Pengfei; Borg, Matthew K.
  • Physics of Fluids, Vol. 30, Issue 8
  • DOI: 10.1063/1.5040574

A diffuse interface model for two-phase flows with phase transition
journal, September 2019

  • Pan, Lun Sheng; Lou, Jing; Li, Hong Ying
  • Physics of Fluids, Vol. 31, Issue 9
  • DOI: 10.1063/1.5113922

Large eddy simulations of diesel-fuel injection and auto-ignition at transcritical conditions
journal, December 2018

  • Ihme, Matthias; Ma, Peter C.; Bravo, Luis
  • International Journal of Engine Research, Vol. 20, Issue 1
  • DOI: 10.1177/1468087418819546

Novel approach for adaptive coefficient tuning for the simulation of evaporating high-speed sprays injected into a high-temperature and high-pressure environment
journal, October 2019

  • Nsikane, Dm; Vogiatzaki, K.; Morgan, Re
  • International Journal of Engine Research, Vol. 21, Issue 7
  • DOI: 10.1177/1468087419878911

High-Pressure Experiments Relevant to Rocket Propulsion
book, January 2020


Numerical Investigations of Phase-Separation During Multi-Component Mixing at Super-Critical Conditions
journal, December 2019


Transition of subcritical liquid jets in single and multicomponent systems
journal, October 2018

  • Ayyappan, Dhanesh; Vaidyanathan, Aravind; Muthukumaran, C. K.
  • Physics of Fluids, Vol. 30, Issue 10
  • DOI: 10.1063/1.5045605

Study on instability of circular liquid jets at subcritical to supercritical conditions using dynamic mode decomposition
journal, January 2020

  • Ayyappan, Dhanesh; S., Ajith Kumar; Vaidyanathan, Aravind
  • Physics of Fluids, Vol. 32, Issue 1
  • DOI: 10.1063/1.5129240