DEVELOPING LATTICE BOLTZMANN METHOD FOR SIMULATION OF REDUCED COMBUSTION MECHANISMS IN LAMINAR METHANE JET DIFFUSION FLAMES

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ASHNA MOSTAFA; RAHIMIAN MOHAMMAD HASAN

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:1 Page(s): 63-71

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Title

DEVELOPING LATTICE BOLTZMANN METHOD FOR SIMULATION OF REDUCED COMBUSTION MECHANISMS IN LAMINAR METHANE JET DIFFUSION FLAMES

Author(s)

ASHNA MOSTAFA | RAHIMIAN MOHAMMAD HASAN | Issue Writer Certificate

Keywords

LATTICE BOLTZMANNQ1

REDUCED MECHANISMQ1

DIFFUSION FLAMEQ1

METHANE JETQ2

Abstract

In this paper the coupled LATTICE BOLTZMANN model is developed for simulation of multi-step combustion mechanism of METHANE JET DIFFUSION FLAME. The LATTICE BOLTZMANN scheme employs the double-distribution-function model, one distribution function for solving flow field and another for temperature and species concentration fields. The density and temperature fields are coupled through low Mach number flow field. The solution parameters such as species properties and rate of chemical reactions are adjusted in each time step according to temperature and concentration of species variations. Using combustion mechanisms instead of one step fast chemistry reaction and considering effect of temperature and species concentration on solution parameters are the main advantages of the developed model. For validation of the model, fourstep REDUCED MECHANISM with six species is used for simulation of combustion in METHANE JET DIFFUSION FLAME configuration. Results show that the developed model predicts the concentration of chemical species and flame temperature with good accuracy. It is important to note that the relaxation time in LATTICE BOLTZMANN equation must be function of both temperature and space to gain these results. Variation of the relaxation time eventuate in divergence of solution in usual LB Models. To overcome this problem the time steps are adjusted according to temperature variation. Agreement between the present results and experimental data confirms that this scheme is also an efficient numerical method for more detailed combustion simulations.

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References

NUMERICAL SIMULATION OF DROPLET COLLISION IN THE TWO PHASE FLOW USING LATTICE BOLTZMANN METHOD

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APA: Copy

ASHNA, MOSTAFA, & RAHIMIAN, MOHAMMAD HASAN. (2016). DEVELOPING LATTICE BOLTZMANN METHOD FOR SIMULATION OF REDUCED COMBUSTION MECHANISMS IN LAMINAR METHANE JET DIFFUSION FLAMES. MODARES MECHANICAL ENGINEERING, 16(1), 63-71. SID. https://sid.ir/paper/178442/en

Vancouver: Copy

ASHNA MOSTAFA, RAHIMIAN MOHAMMAD HASAN. DEVELOPING LATTICE BOLTZMANN METHOD FOR SIMULATION OF REDUCED COMBUSTION MECHANISMS IN LAMINAR METHANE JET DIFFUSION FLAMES. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(1):63-71. Available from: https://sid.ir/paper/178442/en

IEEE: Copy

MOSTAFA ASHNA, and MOHAMMAD HASAN RAHIMIAN, “DEVELOPING LATTICE BOLTZMANN METHOD FOR SIMULATION OF REDUCED COMBUSTION MECHANISMS IN LAMINAR METHANE JET DIFFUSION FLAMES,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 1, pp. 63–71, 2016, [Online]. Available: https://sid.ir/paper/178442/en

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