Modeling of Aluminum Nano-Particles Through Counterflow Combustion in Fuel-Lean Mixture
Mehdi Bidabadi,
Yasna Pourmohammad,
Moein Mohammadi,
Hamed Khalili
Issue:
Volume 3, Issue 4, August 2017
Pages:
32-40
Received:
29 May 2017
Accepted:
24 August 2017
Published:
7 October 2017
Abstract: The combustion of aluminum nano-particles under fuel-lean conditions is studied in the counterflow configuration by means of analytical approach. The flame is assumed to consist of three zones: preheat, flame, and post flame regimes. By extraction and non-dimensionalizing of energy equations and then solving them in preheat zone and using perturbation method in the flame regime, analytical formulas for particles and gas temperature profile are presented. Then dimensionless ignition and ultimate flame temperatures, place of ignition point and flame thickness as a function of equivalence ratio in different strain rates are obtained. In addition, dimensionless ignition temperature, place of ignition point and flame thickness in terms of strain rate for different equivalence ratios are demonstrated. Reasonable agreement between the analytical solution of aluminum nano-particles counterflow combustion and experimental data is obtained in terms of flame temperature.
Abstract: The combustion of aluminum nano-particles under fuel-lean conditions is studied in the counterflow configuration by means of analytical approach. The flame is assumed to consist of three zones: preheat, flame, and post flame regimes. By extraction and non-dimensionalizing of energy equations and then solving them in preheat zone and using perturbat...
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Combined Effect of Magnetic field and Internal Heat Generation on the Onset of Marangoni Convection
Issue:
Volume 3, Issue 4, August 2017
Pages:
41-45
Received:
21 April 2017
Accepted:
15 September 2017
Published:
23 October 2017
Abstract: Marangoni convection in a horizontal layer with a uniform internal heat source and vertical magnetic field is analyzed. The boundaries are considered to be rigid, however permeable, and insulated to temperature perturbations. The upper surface of a fluid layer is deformably free. The eigen value equations of the perturbed state obtained from the normal mode analysis are solved by using regular perturbation method with as wave number. The results show that the critical Marangoni number Mc become larger as the Chandrasekhar number Q increases, internal heat source and the Crispation number Cr decreases.
Abstract: Marangoni convection in a horizontal layer with a uniform internal heat source and vertical magnetic field is analyzed. The boundaries are considered to be rigid, however permeable, and insulated to temperature perturbations. The upper surface of a fluid layer is deformably free. The eigen value equations of the perturbed state obtained from the no...
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