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    A Comparison of Constraint and Constraint Potential Forms of the Rate Controlled Constraint Equilibrium Method

    Source: Journal of Energy Resources Technology:;2016:;volume( 138 ):;issue: 002::page 22202
    Author:
    Hadi, Fatemeh
    ,
    H. Sheikhi, M. Reza
    DOI: 10.1115/1.4031614
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A comparative assessment is made of two implementations of the ratecontrolled constrainedequilibrium (RCCE) method. These are the constraint and constraint potential formulations in which rate equations are solved for the RCCE constraints and constraint potentials, respectively. The two forms are equivalent mathematically; however, they involve different numerical procedures and thus show different computational performance. The main objective of this study is to compare the accuracy and numerical efficiency of the two formulations to attain the most effective implementation of the RCCE in turbulent combustion simulations. The RCCE method is applied to study methane oxygen combustion in an adiabatic, isobaric well stirred reactor. Simulations are carried out over a wide range of initial temperatures and equivalence ratios. Performance studies are conducted and RCCE results are compared with those obtained by direct integration of detailed chemical kinetics. The results show that both methods provide very accurate representation of the kinetics. It is also demonstrated that while the constraint form involves less numerical stiffness, the constraint potential implementation results in more saving in computation time.
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      A Comparison of Constraint and Constraint Potential Forms of the Rate Controlled Constraint Equilibrium Method

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    http://yetl.yabesh.ir/yetl1/handle/yetl/160851
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    contributor authorHadi, Fatemeh
    contributor authorH. Sheikhi, M. Reza
    date accessioned2017-05-09T01:27:37Z
    date available2017-05-09T01:27:37Z
    date issued2016
    identifier issn0195-0738
    identifier otherjert_138_02_022202.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/160851
    description abstractA comparative assessment is made of two implementations of the ratecontrolled constrainedequilibrium (RCCE) method. These are the constraint and constraint potential formulations in which rate equations are solved for the RCCE constraints and constraint potentials, respectively. The two forms are equivalent mathematically; however, they involve different numerical procedures and thus show different computational performance. The main objective of this study is to compare the accuracy and numerical efficiency of the two formulations to attain the most effective implementation of the RCCE in turbulent combustion simulations. The RCCE method is applied to study methane oxygen combustion in an adiabatic, isobaric well stirred reactor. Simulations are carried out over a wide range of initial temperatures and equivalence ratios. Performance studies are conducted and RCCE results are compared with those obtained by direct integration of detailed chemical kinetics. The results show that both methods provide very accurate representation of the kinetics. It is also demonstrated that while the constraint form involves less numerical stiffness, the constraint potential implementation results in more saving in computation time.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Comparison of Constraint and Constraint Potential Forms of the Rate Controlled Constraint Equilibrium Method
    typeJournal Paper
    journal volume138
    journal issue2
    journal titleJournal of Energy Resources Technology
    identifier doi10.1115/1.4031614
    journal fristpage22202
    journal lastpage22202
    identifier eissn1528-8994
    treeJournal of Energy Resources Technology:;2016:;volume( 138 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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