Diese Seite ist nicht editierbar. Sie können den Quelltext sehen, jedoch nicht verändern. Kontaktieren Sie den Administrator, wenn Sie glauben, dass hier ein Fehler vorliegt. ======Pre-Processing====== ===== Preparing a REX3D Simulation===== Before a flow simulation can be performed, it must be configured as follows:\\ * **Option 1**: Menu: //Simulation// > //Open REX3D Configuration//\\ * **Option 2**: Double-click //REX3D// in the process tree\\ \\ {{ :rex3d:rex171_3d_en006.png?nolink |}} \\ In the window that appears, simulation configurations can be added. Either as a copy of an existing configuration or empty.\\ {{ :rex3d:rex171_3d_en_007.png?nolink |}} The following window then opens:\\ {{ :en:rex3d:rex19_openfoam_prepro_en.png?nolink |}} ====Defining the REX3D Configuration==== \\ 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//.\\ ====Defining the Geometry==== The //Screw Configuration// section lists all screw sections 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. ====Material==== The material used for the simulation is displayed under //Material//. The corresponding material data can be accessed via the material entry.\\ ====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 (.step file) 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 activated, the temperature development will be neglected and the simulation will be faster.\\ \\ With //Automatic Post-Processing//, an automatic evaluation of the calculation results can be started directly after the simulation has been completed. ====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.\\ ====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.\\ ====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.\\ =====Starting a REX3D Simulation===== To start the simulation a simulation configuration must be opened. * First, the number of CPU cores to be used must be defined. At least 2 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.\\ \\ {{ :en:rex3d:rex19_openfoam_simulation_en.png?nolink |}} \\ The geometry will be generated based on the previously defined input data and will be displayed in a preview window.\\ \\ {{ :en:rex3d:rex171_3d_en_005.png?nolink |}} \\ 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 geometry meets the requirements, click the //OK// button to start the simulation.\\ \\ ===Further Topics=== * [[en:rex3d:rex3dpreprocessing|]] * [[en:Rex3d:Rex3dPostProcessing]] * [[en:Rex3d:Rex3dKonfiguration]] * [[en:Rex3d:openfoamremote]]