Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- en:berechnungen:einfache_berechnung [2025/01/13 17:50] – [Calculation settings] neelest
+++ en:berechnungen:einfache_berechnung [2026/09/17 09:23] (aktuell) – gelöscht - Externe Bearbeitung (Unbekanntes Datum) 127.0.0.1
@@ Zeile 1: / Zeile 1: @@
-======Regular calculation ======
-===== Starting a calculation =====
-There are two ways to start the calculation \\
-  - With selection of the calculation and process settings
-  - Quick calculation with the last used calculation and process settings
-{{ :berechnungen:rex171_ber_009_en.png?nolink |}}
-The first selection opens a window in which the process parameters and the calculation settings can be changed. The settings are presented below.
-Confirming the //Calculate...// button starts the calculation and the calculation progress and report display appears.
-With the 2nd selection, the last known process and calculation settings are used and the progress and report display appears immediately.
-{{ :berechnungen:berechnungseinstellungen:rex171_ber_005_en.png?nolink |}}
-The calculation log appears in the upper part of the progress and report display. The calculation process can be recognised by the sequence at the bottom of the window. \\
-Here means: \\
-  * **Green**: Successful calculation
-  * **Orange**: Warning message
-  * **Red**: Error message
-By clicking on an orange or red field, the log jumps directly to the corresponding warning or error message.
-==== Process parameters ====
-See [[en:eingabe_der_verfahrensparameter:eingabe_der_verfahrensparameter|Define process parameters]]
-==== Calculation settings ====
-{{ :berechnungen:rex171_ber_002_en.png?nolink |}}
-The calculation settings are divided into 4 sections:
-=== Throughput ===
-see also [[en:berechnungen:durchsatz|Throughput]]
-Three basic settings are possible here \\
-    * **Melt dominated**: Standard setting, melt conveying dominates the throughput
-    * **Coupling solids conveying**: the [[en:berechnungen:feststofffoerderung|Solids conveying]] of the feed zone is also taken into account
-    * **Slot bushing**: the throughput is determined by the [[en:eingabe_der_zylinderdaten:eingabe_eines_nutbuchsenextruders|Grooved bush]] ([[berechnungen:nutbuchsenberechnung|Grooved bush calculation]]).
-If a grooved bush is defined, you can also select whether the calculation
-  * **Conveyor stiffness** (default) or
-  * **limit speed orientated**
-and the conveying case differentiation can also be selected.
-You can also select whether the throughput calculation should take [[en:berechnungen:wandgleitende_materialien|Wall-slipping]] into account. In this case, corresponding [[en:materialdaten:rheologische_materialdaten|material data]] are required.
-For **screws with barrier zones**, there are two options for calculating the pressure throughput
-  * The **analytical nodal point method**: based on network theory, standard
-  * Assumption of a **constant pressure gradient** between the solids and melt channel
-If a **barrier zone becomes blocked** (solids bed width y in the solids channel achieved by compressing the channel over 100% channel width, **within** a barrier zone), the following options are available
-  * Continued **conventional melting**, in this case the solid changes into the melt channel and conventional melting is calculated in both channels
-  * **Disperse melting** from the location of the blockage
-If solid bed widths of more than 100% **outside** a barrier zone occur, the melting calculation is cancelled with a warning message.
-It is also possible to select whether the message of an insufficient feed throughput through the hopper should be displayed or suppressed. It only makes sense to display the message if a hopper has been defined. Otherwise, a round hopper opening the size of the extruder's nominal diameter is assumed.
-=== Melting ===
-see also [[en:berechnungen:aufschmelzverlauf|Melting]]
-For degassing screws only, three options can be selected:
-  * **to degassing zone**: Standard, the melting calculation stops at the first degassing zone
-  * **from degassing zone conventional**: conventional melting also in/after the degassing zone. However, if disperse melting has already been forced, for example by a shearing part before the degassing zone, disperse melting will continue to be calculated.
-  * **from degassing zone disperse**: disperse melting in/after the degassing zone
-=== Temperature ===
-see also [[en:berechnungen:temperaturverlauf|Temperature]]
-  * If //Iterate temperature// is **not** selected, the calculation is only calculated with an //initial temperature profile//. This is described by a linear progression of the temperature from the melting temperature ($T_G$ / $T_K$) at the front edge of the hopper to the specified final melt temperature (see [[en:eingabe_der_verfahrensparameter:eingabe_der_verfahrensparameter|necessary process parameters]]) at the screw tip. For degassing extruders, the specified final melt temperature already applies to the start of the first degassing zone and remains constant thereafter. \\ If //Iteration of the final temperature// is selected, the calculated temperature profile is used iteratively for a new calculation of the entire process until a stationary state (no change in the final temperature) is reached.
-  * If an internal temperature control is defined, the calculation of the internal temperature control can be activated or deactivated.
-=== Power ===
-See also [[en:berechnungen:leistung_und_schubspannungen|Power]]
-Three power models can be selected:
-  * Enthalpy
-  * Isothermal
-  * Non-isothermal
-==== Check ====
-{{ :berechnungen:berechnungseinstellungen:rex171_ber_003_en.png?nolink |}}
-The //Check// overview summarises which curves and parameters can be calculated (green tick) or cannot be calculated (exclamation mark). \\
-Click on the exclamation mark to display the reason why a curve or parameter cannot be calculated.
-===Further topics===
-  * [[en:berechnungen:einfache_berechnung|]]
-  * [[en:berechnungen:durchsatz|]]
-  * [[en:berechnungen:druckverlauf|]]
-  * [[en:berechnungen:aufschmelzverlauf|]]
-  * [[en:berechnungen:temperaturverlauf|]]
-  * [[en:berechnungen:leistung_und_schubspannungen|]]
-  * [[en:berechnungen:verweilzeit|]]
-  * [[en:berechnungen:verweilzeitverteilung|]]
-  * [[en:berechnungen:materialabbau|]]
-  * [[en:berechnungen:faserlaengenabbau|]]
-  * [[en:berechnungen:entgasungskennzahlen|]]
-  * [[en:berechnungen:festigkeitsberechnung|]]
-  * [[en:berechnungen:schlepp-druckstroemung|]]
-  * [[en:berechnungen:feststofffoerderung|]]
-  * [[en:berechnungen:verarbeitung_von_mischungen|]]
-  * [[en:berechnungen:wandgleitende_materialien|]]
-  * [[en:berechnungen:nutbuchsenberechnung|]]
-  * [[en:berechnungen:kompressionsverhaeltnisse|]]