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  "title": {
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    "en": "DEE - DEE-e"
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    {
      "language": "en",
      "title": "DEE - DEE-e",
      "url": "/output/DEE/DEE-e_en.html",
      "excerpt": "DEE - DEE-e DE DEE DEE-e Contents DEE-e On this page eReference Springer Verlag Variable 19 - Shape factor Variable 20 – Flattening coefficient Unit cell of the model of Zehner/Bauer/Schlünder Variable 19 - Shape factor Variable 20 – Flattening coefficient Accommodation coefficient Variable 19 - Shape factor Variable 20 – Flattening coefficient Variable list Variable 19 - Shape factor Variable 20 – Flattening coefficient DEE-e eReference Springer Verlag VDI Heat Atlas eReference Unit cell of the model of Zehner/Bauer/Schlünder Accommodation coefficient The accommodation coefficient γ can be calculated by means of the correlation: Here, T is the absolute temperature. The quantity C depends on the molar mass of the gas (He: C = 50, H2O: C = 3.6, air: C = 2.8). The surface roughness of the particles can be estimated with the help of, e.g., REM-pictures. Schlünder uses δ = 0 for glass, polymeric, and metallic particles, whereas Mollekopf applies a value of δ = 2.5 μ m for particles made of aluminum silicate. Variable list Variable 19 - Shape factor Shape factors and flattening coefficients Particle shape C f φ Material Spherical 1,25 0,0077 Ceramic 0,0013 Steel 0,0253 Copper Cylindrical 2,50 ? Raschig rings 2,5[1+(d i /d a ²)] ? Irregular (broken) 1,40 0,0010 Sand Variable 20 – Flattening coefficient Shape factors and flattening coefficients Particle shape C f φ Material Spherical 1,25 0,0077 Ceramic 0,0013 Steel 0,0253 Copper Cylindrical 2,50 ? Raschig rings 2,5[1+(d i /d a ²)] "
    },
    {
      "language": "de",
      "title": "DEE",
      "url": "/output/DEE/DEE_de.html",
      "excerpt": "DEE EN DEE Navigation DEE Auf dieser Seite eReference Springer Verlag Variable 19 - Formfaktor Variable 20 – Abflachungskoeffizient Einheitszelle des Modells von Zehner/Bauer/Schlünder Variable 19 - Formfaktor Variable 20 – Abflachungskoeffizient Akkommodationskoeffizient Variable 19 - Formfaktor Variable 20 – Abflachungskoeffizient Variablenliste Variable 19 - Formfaktor Variable 20 – Abflachungskoeffizient DEE eReference Springer Verlag Zum Springer Wärmeatlas 11. Auflage Einheitszelle des Modells von Zehner/Bauer/Schlünder Akkommodationskoeffizient Zur Berechnung des Akkommodationskoeffizienten γ wird folgende Gleichung empfohlen: mit T als der absoluten Temperatur. Die Größe C hängt von der Molmasse des Gases ab (He: C = 50, H 2 O: C = 3,6, Luft: C = 2,8). Die Oberflächenrauigkeit der Partikel muss abgeschätzt werden, z.B. durch Auswertung von REM-Aufnahmen. Schlünder verwendete δ = 0 für Partikeln aus Glas, Kunststoff und Metall; Mollekopf setzte δ = 2,5 μ m für Partikeln aus Aluminiumsilikat. Variablenliste Variable 19 - Formfaktor Formfaktoren und Abflachungskoeffizienten Partikelform C f φ Material Kugeln 1,25 0,0077 Keramik 0,0013 Stahl 0,0253 Kupfer Zylinder 2,50 ? Raschig-Ringe 2,5[1+(d i /d a ²)] ? Gebrochen* 1,40 0,0010 Sand * unregelmäßig geformte kantige Partikel Variable 20 – Abflachungskoeffizient Formfaktoren und Abflachungskoeffizienten Partikelform C f φ Material Kugeln 1,25 0,0077 Keramik 0,0013 Stahl 0,0253 Kupfer Zylinder 2,50 ? Raschig-Ringe 2,5[1+(d i"
    }
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  "variables": [
    {
      "varNr": 19,
      "semanticStatus": "legacy-help-only",
      "label": {
        "de": "DEE - Variable 19 - Formfaktor",
        "en": "DEE - Variable 19 - Shape factor"
      },
      "description": {
        "de": "DEE - Variable 19 - Formfaktor DEE Variable 19 - Formfaktor Navigation Akkommodationskoeffizient Einheitszelle des Modells von Zehner/Bauer/Schlünder eReference Springer Verlag Engineering Your Best Variable 19 - Formfaktor Variable 20 – Abflachungskoeffizient Variablenliste Engineering Your Best Variable 19 - Formfaktor Variable 19 - Formfaktor Formfaktoren und Abflachungskoeffizienten Partikelform C f φ Material Kugeln 1,25 0,0077 Keramik 0,0013 Stahl 0,0253 Kupfer Zylinder 2,50 ? Raschig-Ringe 2,5[1+(d i /d a ²)] ? Gebrochen* 1,40 0,0010 Sand * unregelmäßig geformte kantige Partikel",
        "en": "DEE - Variable 19 - Shape factor DEE Variable 19 - Shape factor Contents Accommodation coefficient eReference Springer Verlag Engineering Your Best Unit cell of the model of Zehner/Bauer/Schlünder Variable 19 - Shape factor Variable 20 – Flattening coefficient Variable list Engineering Your Best Variable 19 - Shape factor Variable 19 - Shape factor Shape factors and flattening coefficients Particle shape C f φ Material Spherical 1,25 0,0077 Ceramic 0,0013 Steel 0,0253 Copper Cylindrical 2,50 ? Raschig rings 2,5[1+(d i /d a ²)] ? Irregular (broken) 1,40 0,0010 Sand"
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      "varNr": 20,
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      "label": {
        "de": "DEE - Variable 20 – Abflachungskoeffizient",
        "en": "DEE - Variable 20 – Flattening coefficient"
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        "de": "DEE - Variable 20 – Abflachungskoeffizient DEE Variable 20 – Abflachungskoeffizient Navigation Akkommodationskoeffizient Einheitszelle des Modells von Zehner/Bauer/Schlünder eReference Springer Verlag Engineering Your Best Variable 19 - Formfaktor Variable 20 – Abflachungskoeffizient Variablenliste Engineering Your Best Variable 20 – Abflachungskoeffizient Variable 20 – Abflachungskoeffizient Formfaktoren und Abflachungskoeffizienten Partikelform C f φ Material Kugeln 1,25 0,0077 Keramik 0,0013 Stahl 0,0253 Kupfer Zylinder 2,50 ? Raschig-Ringe 2,5[1+(d i /d a ²)] ? Gebrochen* 1,40 0,0010 Sand * unregelmäßig geformte kantige Partikel",
        "en": "DEE - Variable 20 – Flattening coefficient DEE Variable 20 – Flattening coefficient Contents Accommodation coefficient eReference Springer Verlag Engineering Your Best Unit cell of the model of Zehner/Bauer/Schlünder Variable 19 - Shape factor Variable 20 – Flattening coefficient Variable list Engineering Your Best Variable 20 – Flattening coefficient Variable 20 – Flattening coefficient Shape factors and flattening coefficients Particle shape C f φ Material Spherical 1,25 0,0077 Ceramic 0,0013 Steel 0,0253 Copper Cylindrical 2,50 ? Raschig rings 2,5[1+(d i /d a ²)] ? Irregular (broken) 1,40 0,0010 Sand"
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      "Calculate, inspect validation messages and read back governing results."
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