Turbulent mixing of a hydrogen jet in crossflow: direct numerical simulation and model assessment

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The aim is to evaluate turbulent species flux models in large-eddy and RANS simulations of hydrogen jet in crossflow.
Utilized direct numerical simulation, large-eddy simulation, and Reynolds-averaged Navier-Stokes approaches.
Focused on port fuel injection conditions and mixture properties in hydrogen combustion.
Analyzed turbulent transport properties derived from DNS data for comparative assessment.
LES accurately predicts mean velocity and Reynolds stresses, while RANS under-predicts Reynolds stresses.
In H2 mixing, LES aligns closely with DNS, but RANS fails to capture the mixing process accurately.
Turbulent diffusivity in RANS is significantly lower than DNS, linked to over-predicted turbulent Schmidt number.

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Investigates turbulent mixing in hydrogen jet flows, highlighting model performance differences.

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Wang et al. (2026) studied this question.

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