Modeling soot particle size distribution in diesel engines

Duvvuri, Pavan Prakash; Sukumaran, Sujith; Shrivastava, Rajesh; Sreedhara, S.

doi:10.1016/j.fuel.2019.01.104

Cited by 24 publications

(13 citation statements)

References 28 publications

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“…The DSM model 14,37 discretizes the soot PSD in to a number of sections, each representing a particular size. Transport equation for soot in each section is solved similar to equation (7) while accounting for the entry and exit of soot particles in to the section using the source terms for various soot processes.…”

Section: Numerical Modelmentioning

confidence: 99%

“…36 Thirty sections have been used in this study to discretize the PSD based on previous work by the authors. 14,38 For both the detailed models, the fraction of reactive surfaces (α) appearing in the surface reaction rate calculation has been calculated based on a temperature dependence. 39 The detailed models have been two-way coupled with the chemical kinetic solver which means soot formation affects the gas phase species and vice versa.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Two such detailed methods have been applied to diesel engines: the method of moments (MOM) 13 and the discrete sectional method (DSM). 14 In MOM, transport equations for the moments of the soot particle size distribution (PSD) are solved. Among the existing closure techniques for the resulting set of equations, MOM by interpolative closure (MOMIC) 15 has been the most widely used technique for diesel engines.…”

Section: Introductionmentioning

confidence: 99%

“…Among the existing closure techniques for the resulting set of equations, MOM by interpolative closure (MOMIC) 15 has been the most widely used technique for diesel engines. In DSM, 14 the soot PSD is binned into various sections, each representing a certain size-range. Transport equation for the soot corresponding to each section is solved while accounting for the entry and exit of soot particles due to nucleation (only for the first section), surface reactions, and coagulation.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of soot models for reacting sprays in diesel engine-like conditions

Duvvuri¹,

Shrivastava²,

Sreedhara

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Stringent emission legislations and growing health concerns have contributed to the evolution of soot modeling in diesel engines from simple empirical relations to methods involving detailed kinetics and complex aerosol dynamics. In this paper, four different soot models have been evaluated for the high temperature, high pressure combusting dodecane spray cases of engine combustion network (ECN) spray A which mimics engine-relevant conditions. The soot models considered include an empirical, a multistep, a method of moments based, and a discrete sectional method soot model. Two experimental cases with ambient oxygen volume of 21% and 15% have been modeled. A good agreement between simulations and experiments for vapor penetration and heat release rate has been obtained. Quasi-steady soot volume fraction contours for the four soot models have been compared with experiments. Contours of the species and source terms involved in soot modeling have also been compared for a better understanding of soot processes. The empirical soot model results in higher magnitude and spread of soot due to a lack of modeling framework for oxidation through OH species. Among the four models studied, the multistep soot model has been observed to provide the most promising agreement with the experimental data in terms of distribution of soot and location of peak soot volume fraction. Due to a two-way coupling of soot models, the detailed models predict an upstream location for soot as compared to the multi-step soot model which is one way coupled. A significant difference (of an order of magnitude) in the concentration of PAH (polycyclic aromatic hydrocarbons) precursor between multistep and detailed soot models has been observed because of precursor consumption due to the coupling of detailed soot models with chemical kinetics. It is recommended that kinetic schemes, especially those concerning PAH, be validated with experimental data with a kinetics-coupled soot model.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of soot models for reacting sprays in diesel engine-like conditions

Duvvuri¹,

Shrivastava²,

Sreedhara

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

Self Cite

View full text Add to dashboard Cite

show abstract

“…The size distribution of the particles is described by the particle number density N. The population balance model is solved using a sectional method [43]. The sectional method has been successfully applied in modelling the evolution of soot particle in flames [44,45] and engines [22,46]. The particle population is divided into sections (i.e.…”

Section: Governing Equationsmentioning

confidence: 99%

Modelling Investigation of the Thermal Treatment of Ash-Contaminated Particulate Filters

Lao

Akroyd

Smith

et al. 2021

Emiss. Control Sci. Technol.

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This paper investigates the impact of thermal treatment on the pressure drop of particulate filters containing ash deposits. A one-dimensional model has been developed and applied to describe the deposition of soot and ash particles, and estimate the spatial distribution of the deposits in such filters. Phenomenological models have been developed to describe the potential sintering and cracking of the ash deposits caused by thermal treatment of the filter. The model results are in good agreement with experimental measurements of the reduction in the pressure drop in thermally treated filters. It was found that crack formation in the ash layer can lead to significant reduction of the pressure drop at relatively low temperatures. Sintering of ash deposits in the wall and the ash plug also contributes towards a decrease in filter pressure drop at higher temperatures. This work is the first attempt to model the impact of the thermal treatment of ash in particulate filters in order to support the development of future ash management strategies. The cracking of the ash layer during the thermal treatment has been identified to be the most critical effect for pressure drop reduction.

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Statistical Analysis of Catalytic Removal of Soot Particles Based on Big Data

Meng

Yang

et al. 2021

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Modeling soot particle size distribution in diesel engines

Cited by 24 publications

References 28 publications

Comparison of soot models for reacting sprays in diesel engine-like conditions

Comparison of soot models for reacting sprays in diesel engine-like conditions

Modelling Investigation of the Thermal Treatment of Ash-Contaminated Particulate Filters

Statistical Analysis of Catalytic Removal of Soot Particles Based on Big Data

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