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Numerical assessment of subgrid scale models for scalar transport in large-eddy simulations of hydrogen-enriched fuels

Research output: Contribution to journalJournal articlepeer-review

Published
  • Daniel Mira Martinez
  • Xi Jiang
  • C. Moulinec
  • D. R. Emerson
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<mark>Journal publication date</mark>5/05/2014
<mark>Journal</mark>International Journal of Hydrogen Energy
Issue number14
Volume39
Number of pages17
Pages (from-to)7173-7189
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A comparison of two different models addressing the scalar transport in large-eddy simulations is conducted for a non-reacting jet and an experimental flame. A simple approach based on a gradient diffusion closure is compared against the linear-eddy model in the context of hydrogen-enriched non-reacting fuel jets and flames burning hydrogen-enriched mixtures. The results show that the gradient diffusion model is not valid as a subgrid scale model for large-eddy simulations of mixtures containing hydrogen. It produces unphysical scalar fields with unrealistic temperature distributions. Approaches based on the linear-eddy model can be used instead to obtain appropriate representation of the scalar field and more accurate predictions of the scalar transport and the temperature field.