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

Mira Martinez, Daniel and Jiang, Xi and Moulinec, C. and Emerson, D. R. (2014) Numerical assessment of subgrid scale models for scalar transport in large-eddy simulations of hydrogen-enriched fuels. International Journal of Hydrogen Energy, 39 (14). pp. 7173-7189. ISSN 0360-3199

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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.

Item Type:
Journal Article
Journal or Publication Title:
International Journal of Hydrogen Energy
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
ID Code:
69265
Deposited By:
Deposited On:
22 Apr 2014 07:59
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Jan 2020 07:42