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Nächste Überarbeitung		Vorhergehende Überarbeitung
en:berechnungen:einfache_berechnung [2025/06/02 12:23] – cschallen:berechnungen:einfache_berechnung [2025/07/03 13:33] (aktuell) – cschall
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   * Assumption of a **constant pressure gradient** between the solids and melt channel   * 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 +If a **barrier zone becomes plugged** (solids bed width y in the solids channel over 100% achieved by compressing the channel, **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 +  * Continued **conventional melting**, in this case the the conventional melting continues in the solid channel. A disperse melting is assumed for the melt channel.
-  * **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.+If solid bed widths of more than 100% **outside** a barrier section 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. 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.
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 For degassing screws only, three options can be selected: For degassing screws only, three options can be selected:
-  * **to degassing zone**: Standard, the melting calculation stops at the first degassing zone +  * **till degassing section**: Standard, the melting calculation stops at the first degassing section 
-  * **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. +  * **conventional melting after degassing section**: conventional melting also in/after the degassing section. However, if disperse melting has already been forced, for example by a shearing part before the degassing section, disperse melting will continue to be calculated. 
-  * **from degassing zone disperse**: disperse melting in/after the degassing zone+  * **disperse melting after the degassing section**: disperse melting in/after the degassing zone
  
 ===3. Temperature === ===3. Temperature ===
 see also [[en:berechnungen:temperaturverlauf|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 //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. \\ Since the influence of the entered melt temperature on the throughput is only minor, the temperature iteration can remain deactivated, provided a reasonable melt temperature can be estimated.
   * If an internal temperature control is defined, the calculation of the internal temperature control can be activated or deactivated.   * If an internal temperature control is defined, the calculation of the internal temperature control can be activated or deactivated.
  
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 ===Further topics=== ===Further topics===
   * [[en:berechnungen:einfache_berechnung|]]   * [[en:berechnungen:einfache_berechnung|]]
 +  * [[en:berechnungen:prozess_iterieren]]
   * [[en:berechnungen:durchsatz|]]   * [[en:berechnungen:durchsatz|]]
   * [[en:berechnungen:druckverlauf|]]   * [[en:berechnungen:druckverlauf|]]
Zeile 97: Zeile 97:
   * [[en:berechnungen:temperaturverlauf|]]   * [[en:berechnungen:temperaturverlauf|]]
   * [[en:berechnungen:leistung_und_schubspannungen|]]   * [[en:berechnungen:leistung_und_schubspannungen|]]
 +  * [[en:berechnungen:schergeschwindigkeit]]
   * [[en:berechnungen:verweilzeit|]]   * [[en:berechnungen:verweilzeit|]]
   * [[en:berechnungen:verweilzeitverteilung|]]   * [[en:berechnungen:verweilzeitverteilung|]]