Modelling of Hydrocarbon Fuel Droplet Heating and Evaporation: Recent Results

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNResearchpeer-review

Abstract

The most recent developments in the modelling of heating and evaporation of hydrocarbon automotive (biodiesel, Diesel, gasoline) fuel droplets at the University of Brighton are reviewed. Analyses of hydrodynamic, kinetic and molecular dynamic models, taking and not taking into account quantum-chemical
effects, are presented. New results in modelling the heating and evaporation of non-spherical (spheroidal) droplets are summarised. In contrast to the models used in most engineering applications, the effects of temperature gradient within spherical droplets were taken into account based on the analytical solution to the one-dimensional heat transfer equation, assuming that the heating process is also spherically symmetric. It was shown that this approach is particularly useful for practical applications in CFD codes. In the case of multi-component droplets we need to take into account that different components evaporate at different rates, creating concentration gradients in the liquid phase. In contrast to the models used in most previous publications, our approach was based on the analytical solution to the species diffusion equation in the liquid phase. These models were implemented into the ANSYS Fluent CFD code using User-Defined
Functions (UDF). The predictions of this code with the new models were verified against the results predicted by the in-house research code. In the case of hydrocarbon fuels with large numbers of components a new multi-dimensional quasi-discrete model has been developed. In this model, the contributions of
individual components are replaced with the contributions of the group of components with close transport and thermodynamic properties, called quasi-components. New approaches to modelling fuel droplet heating, evaporation and ignition, based on the method of integral manifolds, and related problems are discussed. Prospects for future research are highlighted.
Original languageEnglish
Title of host publicationProceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9)
EditorsAlexander Snegirev, N Liu, F Tamanini, Derek Bradley, N Chaumeix
Place of PublicationSt Petersburg
PublisherSt Petersburg Polytechnic University
Pages125-134
Number of pages10
ISBN (Print)9785742264965
DOIs
Publication statusPublished - 22 Apr 2019

Fingerprint

Evaporation
Hydrocarbons
Heating
Computational fluid dynamics
Industrial heating
Liquids
Biodiesel
Transport properties
Thermal gradients
Gasoline
Ignition
Molecular dynamics
Dynamic models
Thermodynamic properties
Hydrodynamics
Heat transfer
Kinetics

Keywords

  • Droplets
  • Hydrocarbon fuel
  • Heating
  • Evaporation
  • Ignition

Cite this

Sazhin, S. (2019). Modelling of Hydrocarbon Fuel Droplet Heating and Evaporation: Recent Results. In A. Snegirev, N. Liu, F. Tamanini, D. Bradley, & N. Chaumeix (Eds.), Proceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9) (pp. 125-134). St Petersburg: St Petersburg Polytechnic University. https://doi.org/10.18720/spbpu/2/k19-6
Sazhin, Sergei. / Modelling of Hydrocarbon Fuel Droplet Heating and Evaporation: Recent Results. Proceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9). editor / Alexander Snegirev ; N Liu ; F Tamanini ; Derek Bradley ; N Chaumeix. St Petersburg : St Petersburg Polytechnic University, 2019. pp. 125-134
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abstract = "The most recent developments in the modelling of heating and evaporation of hydrocarbon automotive (biodiesel, Diesel, gasoline) fuel droplets at the University of Brighton are reviewed. Analyses of hydrodynamic, kinetic and molecular dynamic models, taking and not taking into account quantum-chemicaleffects, are presented. New results in modelling the heating and evaporation of non-spherical (spheroidal) droplets are summarised. In contrast to the models used in most engineering applications, the effects of temperature gradient within spherical droplets were taken into account based on the analytical solution to the one-dimensional heat transfer equation, assuming that the heating process is also spherically symmetric. It was shown that this approach is particularly useful for practical applications in CFD codes. In the case of multi-component droplets we need to take into account that different components evaporate at different rates, creating concentration gradients in the liquid phase. In contrast to the models used in most previous publications, our approach was based on the analytical solution to the species diffusion equation in the liquid phase. These models were implemented into the ANSYS Fluent CFD code using User-DefinedFunctions (UDF). The predictions of this code with the new models were verified against the results predicted by the in-house research code. In the case of hydrocarbon fuels with large numbers of components a new multi-dimensional quasi-discrete model has been developed. In this model, the contributions ofindividual components are replaced with the contributions of the group of components with close transport and thermodynamic properties, called quasi-components. New approaches to modelling fuel droplet heating, evaporation and ignition, based on the method of integral manifolds, and related problems are discussed. Prospects for future research are highlighted.",
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Sazhin, S 2019, Modelling of Hydrocarbon Fuel Droplet Heating and Evaporation: Recent Results. in A Snegirev, N Liu, F Tamanini, D Bradley & N Chaumeix (eds), Proceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9). St Petersburg Polytechnic University, St Petersburg, pp. 125-134. https://doi.org/10.18720/spbpu/2/k19-6

Modelling of Hydrocarbon Fuel Droplet Heating and Evaporation: Recent Results. / Sazhin, Sergei.

Proceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9). ed. / Alexander Snegirev; N Liu; F Tamanini; Derek Bradley; N Chaumeix. St Petersburg : St Petersburg Polytechnic University, 2019. p. 125-134.

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNResearchpeer-review

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AB - The most recent developments in the modelling of heating and evaporation of hydrocarbon automotive (biodiesel, Diesel, gasoline) fuel droplets at the University of Brighton are reviewed. Analyses of hydrodynamic, kinetic and molecular dynamic models, taking and not taking into account quantum-chemicaleffects, are presented. New results in modelling the heating and evaporation of non-spherical (spheroidal) droplets are summarised. In contrast to the models used in most engineering applications, the effects of temperature gradient within spherical droplets were taken into account based on the analytical solution to the one-dimensional heat transfer equation, assuming that the heating process is also spherically symmetric. It was shown that this approach is particularly useful for practical applications in CFD codes. In the case of multi-component droplets we need to take into account that different components evaporate at different rates, creating concentration gradients in the liquid phase. In contrast to the models used in most previous publications, our approach was based on the analytical solution to the species diffusion equation in the liquid phase. These models were implemented into the ANSYS Fluent CFD code using User-DefinedFunctions (UDF). The predictions of this code with the new models were verified against the results predicted by the in-house research code. In the case of hydrocarbon fuels with large numbers of components a new multi-dimensional quasi-discrete model has been developed. In this model, the contributions ofindividual components are replaced with the contributions of the group of components with close transport and thermodynamic properties, called quasi-components. New approaches to modelling fuel droplet heating, evaporation and ignition, based on the method of integral manifolds, and related problems are discussed. Prospects for future research are highlighted.

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KW - Heating

KW - Evaporation

KW - Ignition

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SN - 9785742264965

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BT - Proceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9)

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Sazhin S. Modelling of Hydrocarbon Fuel Droplet Heating and Evaporation: Recent Results. In Snegirev A, Liu N, Tamanini F, Bradley D, Chaumeix N, editors, Proceedings of the Ninth International Seminar on Fire and Explosion Hazards (ISFEH9). St Petersburg: St Petersburg Polytechnic University. 2019. p. 125-134 https://doi.org/10.18720/spbpu/2/k19-6