Effects of nonreacting solid particle and liquid droplet loading on an exothermic reacting mixing layer

Numerical simulations are conducted of two-dimensional (2D) exothermic reacting mixing layers laden with either solid particles or evaporating liquid droplets. An irreversible reaction of the form fuel+r Oxidizer→(1+r) Products with exothermic Arrhenius kinetics is considered. The temporally developing mixing layers are formed by the merging of parallel flowing oxidizer and fuel streams, each uniformly laden with nonreacting particles or droplets. The gaseous phase is governed by the compressible form of the Navier–Stokes equations together with transport equations for the fuel, oxidizer, product, and evaporated vapor species concentrations. Particles and droplets are assumed smaller than the gas-phase length scales and are tracked individually in the Lagrangian reference frame. Complete “two-way” couplings of mass, momentum, and energy between phases are included in the formulation. The simulation parameters are chosen to study the effects of the mass loading ratio, particle Stokes number, vaporization, ...

[1]  R. Hanson,et al.  An experimental study of the structure of a compressible, reacting mixing layer , 1993 .

[2]  Farzad Mashayek,et al.  Droplet–turbulence interactions in low-Mach-number homogeneous shear two-phase flows , 1998, Journal of Fluid Mechanics.

[3]  Eckart Meiburg,et al.  THE ACCUMULATION AND DISPERSION OF HEAVY PARTICLES IN FORCED TWO-DIMENSIONAL MIXING LAYERS. I: THE FUNDAMENTAL AND SUBHARMONIC CASES , 1994 .

[4]  M. Carpenter,et al.  Several new numerical methods for compressible shear-layer simulations , 1994 .

[5]  C. M. Coats,et al.  Nonpremixed combustion in turbulent mixing layers. Part 1 : Flame characteristics , 2000 .

[6]  J. Bellan,et al.  Direct Numerical Simulation and Subgrid Analysis of a Transitional Droplet Laden Mixing Layer , 2000 .

[7]  T. Jackson,et al.  The structure of variable property, compressible mixing layers in binary gas mixtures , 1996 .

[8]  C. K. Madnia,et al.  Structure of a Turbulent Reacting Mixing Layer , 1994 .

[9]  Jacqueline H. Chen,et al.  Mean flow effects on the linear stability of compressible planar jets , 1998 .

[10]  Clayton T. Crowe,et al.  On the effect of particles on carrier phase turbulence in gas-particle flows , 1997 .

[11]  D. G. Lasseigne,et al.  The stability of compressible mixing layers in binary gases , 1996 .

[12]  J. Lasheras,et al.  Dissipation due to particle/turbulence interaction in a two-phase, turbulent, shear layer , 1997 .

[13]  G. Mariotti,et al.  Direct numerical simulation of particle behaviour in the wall region of turbulent flows in horizontal channels , 1992 .

[14]  Josette Bellan,et al.  Direct numerical simulations of supercritical fluid mixing layers applied to heptane–nitrogen , 2001, Journal of Fluid Mechanics.

[15]  F. Mashayek.  Direct numerical simulations of evaporating droplet dispersion in forced low Mach number turbulence , 1998 .

[16]  C. Crowe,et al.  Direct numerical simulation of a three-dimensional temporal mixing layer with particle dispersion , 1998, Journal of Fluid Mechanics.

[17]  S. Lele,et al.  Motion of particles with inertia in a compressible free shear layer , 1991 .

[18]  T. Poinsot.  Boundary conditions for direct simulations of compressible viscous flows , 1992 .

[19]  Said Elghobashi,et al.  On predicting particle-laden turbulent flows , 1994 .

[20]  M. Maxey,et al.  Simulations of dispersed turbulent multiphase flow , 1997 .

[21]  Josette Bellan,et al.  Evaluation of equilibrium and non-equilibrium evaporation models for many-droplet gas-liquid flow simulations , 1998 .

[22]  Ralph W. Metcalfe,et al.  Effects of heat release on the large-scale structure in turbulent mixing layers , 1989, Journal of Fluid Mechanics.

[23]  K. Squires,et al.  Direct numerical simulation of turbulence modulation by particles in isotropic turbulence , 1998, Journal of Fluid Mechanics.

[24]  L. Collins,et al.  A numerical study of the modulation of isotropic turbulence by suspended particles , 1996, Journal of Fluid Mechanics.

[25]  K. Squires,et al.  Preferential concentration of particles by turbulence , 1991 .

[26]  G. S. Patterson,et al.  DIFFUSION EXPERIMENTS WITH NUMERICALLY INTEGRATED ISOTROPIC TURBULENCE. , 1974 .

[27]  Clayton T. Crowe,et al.  Numerical models for two-phase turbulent flows , 1996 .

[28]  John R. Fessler,et al.  Preferential concentration of particles by turbulence , 1991 .

[29]  J. H. Ferziger,et al.  Linear stability of the reacting mixing layer , 1990 .

[30]  M. Soteriou,et al.  Particle dispersion in variable density and viscosity shear flows , 1999 .

[31]  J. Bellan,et al.  On The Validity of the Assumed PDF Method for Modeling Binary Mixing/Reaction of Evaporated Vapor in GAS/Liquid-Droplet Turbulent Shear Flow , 1997 .

[32]  F. Browand,et al.  Vortex pairing : the mechanism of turbulent mixing-layer growth at moderate Reynolds number , 1974, Journal of Fluid Mechanics.

[33]  S. Elghobashi,et al.  On the two-way interaction between homogeneous turbulence and dispersed solid particles. I: Turbulence modification , 1993 .

[34]  K. Squires,et al.  Measurements of particle dispersion obtained from direct numerical simulations of isotropic turbulence , 1991, Journal of Fluid Mechanics.

[35]  John K. Eaton,et al.  Effect of Selective Modification of Turbulence on Two-Equation Models for Particle-Laden Turbulent Flows , 1994 .

[36]  David J. Glaze,et al.  Effect of dispersion characteristics on particle temperature in an idealized nonpremixed reacting jet , 2000 .

[37]  Steven A. Orszag,et al.  Direct numerical simulations of chemically reacting turbulent mixing layers , 1986 .

[38]  A. Riaz,et al.  Vorticity dynamics of dilute two-way-coupled particle-laden mixing layers , 1999, Journal of Fluid Mechanics.

[39]  Farzad Mashayek,et al.  Temperature decay in two-phase turbulent flows , 2000 .

[40]  Goodarz Ahmadi,et al.  Brownian particle deposition in a directly simulated turbulent channel flow , 1993 .

[41]  J. McLaughlin,et al.  A New Correlation for the Aerosol Deposition Rate in Vertical Ducts , 1995 .

[42]  Juan C. Lasheras,et al.  Particle dispersion in a turbulent, plane, free shear layer , 1989 .

[43]  Clayton T. Crowe,et al.  Effect of particle size on modulating turbulent intensity , 1989 .

[44]  C. Crowe,et al.  Particle dispersion by vortex structures in plane mixing layers , 1992 .

[45]  J. Bellan,et al.  Direct numerical simulation of a confined three-dimensional gas mixing layer with one evaporating hydrocarbon-droplet-laden stream , 1999, Journal of Fluid Mechanics.

[46]  R. Moser,et al.  Mixing transition and the cascade to small scales in a plane mixing layer , 1991 .

[47]  A. Roshko,et al.  The compressible turbulent shear layer: an experimental study , 1988, Journal of Fluid Mechanics.

[48]  C. M. Coats,et al.  Nonpremixed combustion in turbulent mixing layers part 2: recirculation, mixing and flame stabilization , 2000 .

[49]  A. Roshko,et al.  On density effects and large structure in turbulent mixing layers , 1974, Journal of Fluid Mechanics.

[50]  K. Squires,et al.  On the effect of nonuniform seeding on particle dispersion in two-dimensional mixing layers , 1998 .

[51]  K. Squires,et al.  Particle response and turbulence modification in isotropic turbulence , 1990 .

[52]  S. Elghobashi,et al.  Direct simulation of particle dispersion in a decaying isotropic turbulence , 1992, Journal of Fluid Mechanics.

[53]  S. Elghobashi,et al.  On the two-way interaction between homogeneous turbulence and dispersed solid particles , 1993 .

[54]  Eckart Meiburg,et al.  The accumulation and dispersion of heavy particles in forced two‐dimensional mixing layers. Part 2: The effect of gravity , 1995 .

[55]  F. Mashayek.  Numerical investigation of reacting droplets in homogeneous shear turbulence , 2000, Journal of Fluid Mechanics.

[56]  Said Elghobashi,et al.  On the two‐way interaction between homogeneous turbulence and dispersed solid particles. II. Particle dispersion , 1994 .

[57]  M. Maxey,et al.  Settling velocity and concentration distribution of heavy particles in homogeneous isotropic turbulence , 1993, Journal of Fluid Mechanics.