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A zero net flux boundary condition is applied to the classical Burke-Schumann diffusion flame. The numerical results indicate that the conventional constant boundary condition is valid only at a high Reynolds number (Re ⩾ 100) and strong back diffusion appears at low Reynolds numbers. The importance of applying this boundary condition in modelling of composite propellant combustion is also discussed.
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Jia et al. (1994) studied this question.
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