Extending a Hybrid Finite-Volume-Element Method to Solve Laminar Diffusive Flame

Darbandi, Masoud; Ghafourizadeh, Majid

doi:10.1080/10407790.2014.894442

Cited by 22 publications

(10 citation statements)

References 75 publications

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“…The authors have already developed a hybrid FVE code [7,[19][20][21][22][23][24][25][26][27], which uses the advantages of both cell-centred finite-volume FV method and the finite-element FE features. The solution domain is broken into a large number of quadrilateral elements and then each element is divided into four sub-quadrilaterals.…”

Section: Methodsmentioning

confidence: 99%

“…All unknown variables are calculated at elements nodes, located at the element vertices. Assembling the four sub-quadrilaterals around a node, the finite volume cells are constructed in which the conservations laws are applied [7,[19][20][21][22][23][24][25][26][27]. Discretizing the governing equations, we obtain a few systems of linear algebraic equations, i.e.…”

Section: Methodsmentioning

confidence: 99%

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The Formation of Pollutants CO/CO2 in a Steam-Injected Combustor

Darbandi¹,

Ghafourizadeh²,

Schneider³

2018

Proceedings of the 5th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'18)

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In this paper, different scenarios for steam injection are examined in a combustor to recognize how the formation of CO and CO 2 pollutants will be affected by such circumstances. The scenarios are inspected via numerical simulations of a chosen combustor. First, the numerical procedures need to be verified. So, we simulate the reactive flow in the combustor under the conditions performed in the corresponding experiment. We validate the numerical solutions by comparing the predicted flame structure with the measured ones. The comparison proves that the current simulations predict the profiles of temperature and CO/CO 2 mass fractions sufficiently accurate. So, we take one more step forward and study different scenarios for the steam injection. To the best of our knowledge, there is no study in literature to investigate these scenarios. We simulate the steam-injected combustors and compare the achieved results with those of the original combustor without equipping it with a steam injector. We consider the steam injection in each of oxidizer and fuel stream separately and compare their contours of temperature, CO, and CO 2 mass fractions inside the combustor with each other. Our explorations indicate that the steam injection reduces the flame temperature as well as the concentrations and emissions of pollutants CO and CO 2 . These findings can be readily used by the designers seeking new qualitative approaches to control the pollutants emissions from industry burners.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The Formation of Pollutants CO/CO2 in a Steam-Injected Combustor

Darbandi¹,

Ghafourizadeh²,

Schneider³

2018

Proceedings of the 5th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'18)

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“…All unknown variables are calculated at elements nodes, located at the element vertices. Assembling the four sub-quadrilaterals around a node, the finite volume cells are constructed in which the conservations laws are applied [22][23][24][25][26][27][28][29][30]. Discretizing the governing equations, we obtain a few systems of linear algebraic equations, i.e.…”

Section: Methodsmentioning

confidence: 99%

“…The authors developed a hybrid FVE-PIS code [22][23][24][25][26][27][28][29][30] to use the advantages of both the cell-centred finite-volume FV method and the finite-element FE features. The solution domain is broken into a large number of quadrilateral elements and then each element is divided into four sub-quadrilaterals.…”

Section: Methodsmentioning

confidence: 99%

The Control of Pollutant Emission from Syngas Flames Using the Oxidizer Dilution Approach

Darbandi¹,

Ghafourizadeh²,

Schneider³

2017

Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17)

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-In this work, we aim to control the emission of greenhouse gases from different syngas-fuel-based flames or the bluff-body stabilized turbulent flame. First, we validate our numerical analysis by solving a benchmark test case using the detailed-chemistry and compare our obtained results with those of experiment. The benchmark test case is fed with a syngas fuel. The comparison shows that our numerical analysis can predict the structure of benchmark flame very well. Second, we simulate the test case with fuelling the same flame; however, fed with different syngas fuels. Then, we compare their achieved greenhouse gas emissions with each other. We feed the flame with different syngas fuels produced from biomass, wood waste, and turkey feathers. Considering these different syngas fuels, we extend the scope of this study and simulate these flames under different conditions of oxidizer dilution. In other words, we dilute the oxidizer by feeding extra nitrogen and report the greenhouse gases emitted from these flames. The comparison is performed to demonstrate the effect of extra nitrogen dilution on their pollution emissions. Our findings show that the dilution of oxidizer (by feeding extra nitrogen) will considerably affect the pollutants emission form these flames. The current study also shows that the emission of carbon monoxide CO would be seriously reduced using the extra nitrogen dilution technique.

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“…6 In that work, we extended the two-dimensional Cartesian-based physical upwind influence scheme PIS to axisymmetric coordinates to calculate the laminar flow fluxes at the cell faces. Later, we extended the PIS to turbulent flow applications.…”

Section: Introductionmentioning

confidence: 99%

Extending a Numerical Procedure to Simulate the Micro/Nanoscale Soot Formation in Ethylene-Air Turbulent Flame Using Acetylene-Route Nucleation

Darbandi

Ghafourizadeh

Schneider

2014

11th AIAA/ASME Joint Thermophysics and Heat Transfer Conference

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In this work, a hybrid finite element volume FEV method is suitably used to simulate the aerosol dynamics and chemistry of micro/nanoscale soot particulates in a heavily sooting ethylene-air turbulent diffusion flame. In the soot simulation part, we numerically solve the two-equation soot model involving the transport equations for soot number density and soot mass fraction, based on the acetylene-route nucleation. In this regard, the nucleation process is described using a one-step reaction for the soot formation (inception) from acetylene. Considering the complex process of acetylene-route soot nucleation, we extend the classical physical upwind influence scheme to approximate a more accurate soot mass fraction and soot number density fluxes at the cell faces. To solve the transport equations for the first two moments of mixture fraction, we impose large detailed chemical kinetics and the flamelet combustion model. We also consider the turbulence-chemistry interaction via imposing suitable probability density functions PDFs in our formulations. Additionally, we consider the two-equation standard κ-ε turbulence model and suitable wall functions to impose the turbulence influences. Assuming an optically thin limit, we take into account the radiation emission of both gaseous mixture and particulate soot parts. The governing equations are solved thorough two different sequential matrices in a bi-implicit manner. Comparing with the measured data, the present solution accurately predicts the temperature and soot volume fraction, which are the key parameters in studying the flame and particulate pollutions.

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Extending a Hybrid Finite-Volume-Element Method to Solve Laminar Diffusive Flame

Cited by 22 publications

References 75 publications

The Formation of Pollutants CO/CO2 in a Steam-Injected Combustor

The Formation of Pollutants CO/CO2 in a Steam-Injected Combustor

The Control of Pollutant Emission from Syngas Flames Using the Oxidizer Dilution Approach

Extending a Numerical Procedure to Simulate the Micro/Nanoscale Soot Formation in Ethylene-Air Turbulent Flame Using Acetylene-Route Nucleation

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