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en:rex3d:rex3dpostprocessing [2026/08/31 11:18] – adminen:rex3d:rex3dpostprocessing [2026/09/18 15:03] (aktuell) – cschall
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 ===== Post-Processing (OpenFOAM) ===== ===== Post-Processing (OpenFOAM) =====
- 
-{{ :rex3d:openfoamreport:rex19_openfoam_postpro_de.png?nolink |}} 
  
 ==== Post-Processing Settings ==== ==== Post-Processing Settings ====
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 After a 3D simulation using OpenFOAM, automated post-processing can be performed. The result of the post-processing is always a PDF report, which can be configured and generated via the REX user interface. After a 3D simulation using OpenFOAM, automated post-processing can be performed. The result of the post-processing is always a PDF report, which can be configured and generated via the REX user interface.
  
-**Post-Processing Placeholder** +{{ :rex3d:openfoamreport:rex19_openfoam_postpro_en.png?nolink&1000 |}}
- +
-**Configuration Placeholder**+
  
 ==== PDF Report ==== ==== PDF Report ====
  
-The PDF report can be customized as shown above. Depending on the configuration, the corresponding pages are generated or omitted, meaning that the length of the report may vary. \+The PDF report can be customized as shown above. Depending on the configuration, the corresponding pages are generated or omitted, meaning that the length of the report may vary.\\
 The possible pages are described below. The possible pages are described below.
  
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 The most important simulation parameters are listed here. These include: The most important simulation parameters are listed here. These include:
  
-* mass flow rate, +  * mass flow rate, 
-* pressure difference, +  * pressure difference, 
-* temperature difference, +  * temperature difference, 
-* mean pressure throughout the entire flow domain, +  * mean pressure throughout the entire flow domain, 
-* mean temperature throughout the entire flow domain, +  * mean temperature throughout the entire flow domain, 
-* mean absolute velocity throughout the entire flow domain, +  * mean absolute velocity throughout the entire flow domain, 
-* mean shear rate throughout the entire flow domain, +  * mean shear rate throughout the entire flow domain, 
-* mean viscosity throughout the entire flow domain, and +  * mean viscosity throughout the entire flow domain, and 
-* mean density throughout the entire flow domain.+  * mean density throughout the entire flow domain.  * Listenpunkt
  
 **Process Data** **Process Data**
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 Additional boundary conditions describing the operating point are listed here. These include: Additional boundary conditions describing the operating point are listed here. These include:
  
-* rotational speed, +  * rotational speed, 
-* inlet temperature (at the beginning of the element), +  * inlet temperature (at the beginning of the element), 
-* screw temperature (or adiabatic boundary condition), and +  * screw temperature (or adiabatic boundary condition), and 
-* barrel temperature (or adiabatic boundary condition).+  * barrel temperature (or adiabatic boundary condition).
  
 **Machine** **Machine**
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 The basic machine and element data are listed here. These include: The basic machine and element data are listed here. These include:
  
-* the geometry origin (generated by REX/PSI or imported geometry), +  * the geometry origin (generated by REX/PSI or imported geometry), 
-* the name of the screw (name from REX/PSI), +  * the name of the screw (name from REX/PSI), 
-* the outer diameter, +  * the outer diameter, 
-* the core diameter (smallest diameter within the simulated screw section), +  * the core diameter (smallest diameter within the simulated screw section), 
-* the length excluding the inlet and outlet sections, and +  * the length excluding the inlet and outlet sections, and 
-* the absolute length.+  * the absolute length.
  
 <WRAP clear/> <WRAP clear/>
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 This page lists the material data used in the simulation, starting with: This page lists the material data used in the simulation, starting with:
  
-* the material name and +  * the material name and 
-* the material type.+  * the material type.
  
 The thermodynamic data and density are then displayed: The thermodynamic data and density are then displayed:
  
-* [[materialdaten:thermodynamische_daten|Thermal conductivity]] at 0°C and its slope per °C +  * [[en:materialdaten:thermodynamische_daten|Thermal conductivity]] at 0°C and its slope per °C 
-* [[materialdaten:thermodynamische_daten|Heat capacity]] at 0°C and its slope per °C +  * [[en:materialdaten:thermodynamische_daten|Heat capacity]] at 0°C and its slope per °C 
-* [[materialdaten:dichtedaten_bzw._spezifisches_volumen|Melt density]] at 0°C and the reduction in density per °C+  * [[en:materialdaten:dichtedaten_bzw._spezifisches_volumen|Melt density]] at 0°C and the reduction in density per °C
  
-Finally, the [[materialdaten:rheologische_materialdaten|Rheological Data]] are listed. This starts with the temperature shift, followed by the viscosity. Different parameters are listed depending on the selected model.+Finally, the [[en:materialdaten:rheologische_materialdaten|Rheological Data]] are listed. This starts with the temperature shift, followed by the viscosity. Different parameters are listed depending on the selected model.
  
 To visualize the viscosity, a diagram with flow curves for three different temperatures is shown. These are the inlet temperature (see Process Data), as well as temperatures 20 °C below and above the inlet temperature. To visualize the viscosity, a diagram with flow curves for three different temperatures is shown. These are the inlet temperature (see Process Data), as well as temperatures 20 °C below and above the inlet temperature.
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 The averaged mixing quality is calculated as the arithmetic mean of the mixing qualities of the two initial distributions. The averaged mixing quality is calculated as the arithmetic mean of the mixing qualities of the two initial distributions.
 +
 +If the analysis includes particle tracking and thus an assessment of distributive mixing quality, a thermal mixing index is also calculated. This index can be regarded as an extension of the distributive mixing quality metric that incorporates the standard deviation of the temperature at the flow outlet. Both the standard deviation and the thermal mixing index can be found on the “Process Data” page. \\
 +Since the initial temperature distribution in the simulation is unknown, the simulation starts with a uniform inlet temperature. As short elements therefore also exhibit a homogeneous temperature distribution at the outlet, the calculation is coupled with the distributive mixing quality, which also plays an important role in achieving thermal homogeneity. The calculation is performed as follows:
 +
 +$$ MQ_{therm.} = \exp\left(-(1 - MQ)\,T_{\mathrm{stabw}}-\frac{2}{1+\exp\left(20(MQ-0.55)\right)}\right)$$
 +
 +{{ :rex3d:thermischekennzahl_en.svg?nolink&600 |}}
  
 <WRAP clear/> <WRAP clear/>
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 ===Further Topics=== ===Further Topics===
- +  * [[en:rex3d:rex3dpreprocessing|]] 
-* [[rex3d:rex3dpreprocessing|]] +  * [[en:Rex3d:Rex3dPostProcessing]] 
-* [[rex3d:rex3dpostprocessing|]] +  
-* [[rex3d:rex3dkonfiguration|]] +  * [[en:Rex3d:Rex3dKonfiguration]] 
 +  * [[en:Rex3d:openfoamremote]]