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--- en:rex3d:rex3dpreprocessing [2024/11/11 17:48] – neelest
+++ en:rex3d:rex3dpreprocessing [2026/09/01 12:40] (aktuell) – [Starting a REX3D Simulation] admin
@@ Zeile 1: / Zeile 1: @@
-====== Pre-Processing======
+======Pre-Processing======
+===== Preparing a REX3D Simulation=====
-===== Preparing a REX3D simulation=====
+Before a flow simulation can be performed, it must be configured as follows:\\
-Before a flow simulation can be carried out, it must be configured as follows:\\
+  * **Option 1**: Menu: //Simulation// > //Open REX3D Configuration//\\
-  * **Way 1**: Menu: //Simulation// > //Open REX3D configuration//\\\
+  * **Option 2**: Double-click //REX3D// in the process tree\\
-  * **Way 2**: Double-click on //REX3D//\\ in the process tree
 \\
+{{ :rex3d:rex171_3d_en006.png?nolink |}}
 \\
-{{ :rex3d:rex171_3d_en_006.png?nolink |}}
+In the window that appears, select whether the simulation should be assigned to an existing process or whether no process assignment should be made.
-In the window that appears, you must select whether the simulation should be assigned to an existing process or whether no assignment should be made.
 {{ :rex3d:rex171_3d_en_007.png?nolink |}}
 The following window then opens:\\
-====Define geometry data====
-\\
-The simulation is configured in this window. If the configuration has previously been assigned to a process, the available screw zone and the process parameters are already defined according to the process. If the configuration is not assigned to a process, you must make these settings yourself. \\
-\\
-{{ :rex3d:rex171_3d_en_001.png?nolink |}}
-Once a process has been selected, the screw zones, shear and mixing parts it contains can be selected. Up to three screw zones (main element, predecessor, successor) can be used in a simulation. \\
-A transition area (gap) can be defined as a transition between two elements.\\
-====Define material====
+{{ :en:rex3d:rex19_openfoam_prepro_en.png?nolink |}}
-The respective process-bound, preset material is displayed. This can be replaced by a customised material for the numerical simulation.\\
-====Define process parameters====
-The viscosity limits are determined automatically from the defined material data and do not need to be modified. Furthermore, the speed, throughput and material temperature are taken from the process, but can be customised.\\
+====Defining the REX3D Configuration====
-The grid quality is set to Coarse by default. It can be changed under Simulation settings. There are a total of three gradations of grid quality. However, as the quality increases, so does the computing requirement and therefore the duration of a simulation.\\
+\\
+The REX3D preprocessing dialog is used to define the screw configuration, material, simulation settings, and process parameters for the numerical flow simulation.\\
+The upper section of the dialog displays the //Configuration Name//, the associated //Process Name//, and optionally a //Comment//.\\
-Another standard setting is the isothermal simulation. In this case, the plastic melt has a constant material temperature as set in the flow simulation under process parameters.\\
+====Defining the Geometry====
+The //Screw Configuration// section lists the screw zones as well as the shear and mixing elements contained in the process in their respective order.\\
+Selecting an entry displays the corresponding data in the lower section of the dialog.\\
+\\
+A //Predecessor// and a //Successor// can be taken into account for the selected element.\\
+\\
+A //Gap// must be defined between the selected element and the respective neighboring element.\\
+\\
+In addition, the geometric parameters of the selected element are displayed.
-If the configuration is assigned to a process, the window can be closed by clicking //OK//. A warning message appears. This draws attention to the fact that subsequent editing of the default settings is no longer possible. By
+====Material====
-click //OK// again to save the configuration and assign it to the corresponding process:\\
+The material used for the simulation is displayed under //Material//. The corresponding material data can be accessed via the material entry.\\
-{{ :rex3d:rex171_3d_en_002.png?nolink |}}
-Alternatively, the created configuration can be saved using the //Export configuration// button. The //Import configuration// button can also be used to import settings from previously saved configurations.\\
+====Simulation Settings====
+The //Simulation Settings// section contains the basic settings for the numerical calculation.\\
+\\
+//OpenFOAM// and //FeatFlow// are available as //Solver// options.\\
+\\
+Two options are available for the geometry:\\
+  * //Generate Geometry//
+  * //Geometry File//
+\\
+When //Generate Geometry// is selected, the geometry required for the simulation is generated from the defined screw configuration. Alternatively, an existing geometry can be selected using //Geometry File//.\\
+\\
+The //Viscosity Limits// define the viscosity range taken into account during the calculation.\\
+\\
+The //Mesh Quality// determines the spatial resolution of the computational mesh. You can choose between //coarse//, //medium//, and //fine//. A higher mesh quality results in a finer computational mesh, but also increases the computational and memory requirements.\\
+\\
+The //Isothermal Simulation// option can be used to perform a calculation with a constant material temperature. If this option is not activated, the temperature development of the melt is taken into account in the thermal calculation.\\
+\\
+With //Automatic Post-Processing//, an automatic evaluation of the calculation results can be started directly after the simulation has been completed.
-=====Starting a REX3D simulation=====
+====Defining the Process Parameters====
+The //Process Parameters// section is used to define the operating conditions for the simulation.\\
+\\
+For the flow simulation, either the //Throughput// or the //Pressure// can be specified.\\
+\\
+The //Material Temperature// describes the temperature of the polymer melt at the inlet of the simulation domain under consideration.\\
-To start the simulation, the REX3D tab must be expanded within the project data. All Extrud3D configurations created that are assigned to the respective process are displayed here.\\
+====Thermal Boundary Conditions====
+For the thermal simulation, the barrel and screw temperatures can either be specified or defined as //adiabatic//.\\
+\\
+If //adiabatic// is deactivated, heat transfer can take place between the barrel and the polymer melt.\\
-Double-click on the name of a configuration to open it:\\
+====Importing and Exporting the Configuration====
+The //Import Configuration// button can be used to load settings from a previously saved REX3D configuration.\\
+\\
+The //Export Configuration// button can be used to save the current configuration for later use.\\
+\\
+Click //OK// to apply the settings. Click //Cancel// to close the dialog without applying the changes. Click //Help// to open the corresponding help page for the dialog.\\
-  * The number of CPU cores is set here. At least 3 CPU cores must be available for the simulation. \\
+=====Starting a REX3D Simulation=====
-  * The simulation can now be started via the button //REX3D Simulation starten//. The necessary hardware requirements are displayed via the //i // button.\\
+To start the simulation, expand the REX3D section under the project data. This section displays all created Extrud3D configurations assigned to the respective process.\\
+Double-click the name of a configuration to open it:\\
+  * Set the number of CPU cores to be used. At least 3 CPU cores must be available for the simulation.\\
+  * The simulation can then be started using the //Start REX3D Simulation// button. The //i// button displays the required hardware specifications.\\
 \\
-{{ :rex3d:rex171_3d_en_004.png?nolink |}}
+{{ :en:rex3d:rex19_openfoam_simulation_en.png?nolink |}}
 \\
-First, a three-dimensional finite element mesh generator (gmsh) generates the geometries based on the previously defined input data and displays the result in a preview window.\\
+First, a three-dimensional finite-element mesh generator (gmsh) generates the geometry based on the previously defined input data and displays the result in a preview window.\\
 \\
-{{ :rex3d:rex171_3d_en_005.png?nolink |}}
+{{ :en:rex3d:rex171_3d_en_005.png?nolink |}}
 \\
-The element can be moved and rotated in space using the mouse. The //Top view// and //Front view// buttons enable predefined viewing angles of the generated element.\\
+The element can be moved and rotated in three-dimensional space using the mouse. The //Top View// and //Front View// buttons provide predefined viewing angles of the generated element.\\
-If the generated mesh meets the expectations, the simulation can be started by clicking the //OK// button.\\
+If the generated mesh meets the requirements, click the //OK// button to start the simulation.\\
 \\
-===Further topics===
+===Further Topics===
   * [[en:rex3d:rex3dpreprocessing|]]
-  * [[en:rex3d:rex3dpostprocessing|]]
+  * [[en:Rex3d:Rex3dPostProcessing]]
-  * [[en:rex3d:rex3dkonfiguration|]]
+  * [[en:Rex3d:Rex3dKonfiguration]]
+  * [[en:Rex3d:openfoamremote]]