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A reduced thermal diffusion model for H and H_2

Schlup, Jason and Blanquart, Guillaume (2018) A reduced thermal diffusion model for H and H_2. Combustion and Flame, 191 . pp. 1-8. ISSN 0010-2180.

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This work details the development of a new, reduced thermal diffusion model. The proposed model derives from the thermal diffusion model of Chapman and Cowling (1970). In its derivation, a set of mixture-averaged like approximations are made, which results in the number of operations being reduced from O(n^2) to sub-linear, where n is the number of species in the chemical model. With these approximations, the new, reduced model thermal diffusion coefficients can be calculated independently for each species. The model is validated against multicomponent thermal diffusion cases using multiple fuel and diluent mixtures at various pressures, temperatures, and equivalence ratios. The resulting reduced model thermal diffusion fluxes agree well with the multicomponent values, with a multiplicative scaling factor identified using a least squares regression. Unstretched laminar flame speeds are compared using the multicomponent and newly developed models. Finally, an a posteriori comparison in a turbulent configuration shows excellent agreement of both the mean and fluctuations of the thermal diffusion coefficients.

Item Type:Article
Related URLs:
URLURL TypeDescription
Schlup, Jason0000-0002-3121-3477
Blanquart, Guillaume0000-0002-5074-9728
Additional Information:© 2018 The Combustion Institute. Received 6 October 2017, Revised 8 November 2017, Accepted 20 December 2017, Available online 9 January 2018. The authors gratefully acknowledge funding from the U.S. Department of Energy-Basic Energy Sciences (DE-SC0006591) under the supervision of Dr. Wade Sisk.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0006591
Subject Keywords:Thermal diffusion; Soret effect; Mixture-averaged diffusion
Record Number:CaltechAUTHORS:20180109-095122223
Persistent URL:
Official Citation:Jason Schlup, Guillaume Blanquart, A reduced thermal diffusion model for H and H2, Combustion and Flame, Volume 191, May 2018, Pages 1-8, ISSN 0010-2180, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84184
Deposited By: Tony Diaz
Deposited On:09 Jan 2018 18:03
Last Modified:09 Jan 2018 18:03

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