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    <id>1121</id>
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    <thesisYearAccepted/>
    <language>eng</language>
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    <pageLast/>
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    <edition/>
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    <completedDate>2009-03-03</completedDate>
    <publishedDate>2009-03-03</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A Priori Tabulation of Turbulent Flame Speeds via a Combination of a Stochastic Mixing Model and Flamelet Generated Manifolds, Extended to Incorporate Strain Effects</title>
    <abstract language="eng">In this paper we revisit the a priori turbulent flame speed tabulation (TFST) technique for a given parameter space within the region of flamelet combustion-regimes. It can be used as a subgrid-scale (SGS) model in Large Eddy Simulation (LES). In a first step, stationary laminar flamelets are computed and stored over the progress variable following the ideas of flamelet generated manifolds (FGM). In a second step, the incompressible one-dimensional Navier-Stokes equations supplemented by the equation for the progress variable are solved on a grid that resolves all turbulent scales. Additionally, turbulent transport is implemented via the linear eddy model (LEM). The turbulent flame structures are solved until a statistically stationary mean value of the turbulent flame speed has been reached. The results are stored in a table that could be used by large scale premixed combustion models, e.g. front tracking schemes. First results are compared quantitatively with direct numerical simulations (DNS) taken from literature. Then it is illustrated in one example how the new method could help to fix constants in algebraic models for turbulent flame speeds. Further it is shown how the technique can be extended to incorporate turbulent strain effects. Finally we investigate the effect of the use of detailed and tabulated chemistry under unsteady conditions.</abstract>
    <identifier type="serial">09-09</identifier>
    <identifier type="issn">1438-0064</identifier>
    <identifier type="opus3-id">1169</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-11214</identifier>
    <author>Heiko Schmidt</author>
    <submitter>unknown unknown</submitter>
    <author>Michael Oevermann</author>
    <author>Rob J.M. Bastiaans</author>
    <author>Alan R. Kerstein</author>
    <series>
      <title>ZIB-Report</title>
      <number>09-09</number>
    </series>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Turbulente Verbrennung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Flammenstrukturen</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Linear Eddy Model</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>FGM</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Turbulente Brenngeschwindigkeit</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Streckungseffekte</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>turbulent premixed combustion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>flame structures</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>linear eddy model</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>flamelet generated manifolds</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>turbulent flame speed tabulation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>strain effects</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="ccs" number="J.2">PHYSICAL SCIENCES AND ENGINEERING</collection>
    <collection role="institutes" number="num">Numerical Mathematics</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/1121/ZR_09_09.pdf</file>
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  <doc>
    <id>1053</id>
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    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
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    <completedDate>2008-01-14</completedDate>
    <publishedDate>2008-01-14</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A priori Tabulation of Turbulent Flame Speeds via a Combination of a Stochastic Mixing Model and Flamelet Generated Manifolds</title>
    <abstract language="eng">In this paper we propose a technique for a priori turbulent flame speed tabulation (TFST) for a given parameter space in standard combustion-regime diagrams. It can be used as a subgrid-scale (SGS) model in Large Eddy Simulation (LES). In a first step, stationary laminar flamelets are computed and stored over the progress variable following the ideas of flamelet generated manifolds (FGM). In a second step, the incompressible one-dimensional Navier-Stokes equations supplemented by the equation for the progress variable are solved on a grid that resolves all turbulent scales. Additionally, turbulent transport is implemented via the linear eddy model (LEM). The turbulent flame structures are solved until a statistically stationary mean value of the turbulent flame speed has been reached. The results are stored in a table that could be used by large scale premixed combustion models, e.g. front tracking schemes. Results are compared to an algebraic model and to direct numerical simulations (DNS).</abstract>
    <identifier type="serial">08-02</identifier>
    <identifier type="issn">1438-0064</identifier>
    <identifier type="opus3-id">1082</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-10532</identifier>
    <author>Heiko Schmidt</author>
    <submitter>unknown unknown</submitter>
    <author>Michael Oevermann</author>
    <author>Rob J.M. Bastiaans</author>
    <author>Alan R. Kerstein</author>
    <series>
      <title>ZIB-Report</title>
      <number>08-02</number>
    </series>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Verbrennung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Flammenstrukturen</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>stochastisches Turbulenzmodell</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>FGM</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>turbulente Brenngeschwindigkeiten</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>turbulent premixed combustion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>flame structures</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>linear eddy model</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>flamelet generated manifolds</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>turbulent flame speeds</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="ccs" number="J.2">PHYSICAL SCIENCES AND ENGINEERING</collection>
    <collection role="pacs" number="02.50.Ey">Stochastic processes</collection>
    <collection role="pacs" number="47.70.Pq">Flames; combustion</collection>
    <collection role="msc" number="65L80">Methods for differential-algebraic equations</collection>
    <collection role="msc" number="65M06">Finite difference methods</collection>
    <collection role="institutes" number="num">Numerical Mathematics</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/1053/HSchmidt_ZR_01_2008.pdf</file>
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