Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- en:berechnungen:verweilzeit [2024/10/30 13:17] – neelest
+++ en:berechnungen:verweilzeit [2025/07/03 13:34] (aktuell) – cschall
@@ Zeile 1: / Zeile 1: @@
 ======Residence time======
+-> [[en:grafische_darstellung_der_ergebnisse:verweilzeit|For a graphical representation of the dwell time curve]]
 For the calculation of the residence time the same conditions as for the calculation of
@@ Zeile 7: / Zeile 9: @@
 **Realization of the theoretical principles**
-The screw is divided into at least 150 parts for the residence time calculation. Up to
+Up to [[en:berechnungen:aufschmelzverlauf|Location of the melt vortex formation (OSW)]], the calculation of the minimum and average residence time does not differ because a block flow is assumed in this area. From the OSW, a distinction is made between the mean and minimum residence time. The mean residence time results in:
-the point of melt pool formation (OSW), there is no difference between the calculation of the
-minimum residence time and that of the average residence time, since a block flow is
+$$\bar{t} = \frac{V}{\dot{V}}$$
-assumed, here. From the point of melt pool formation (OSW) the residence time is calculated
+with the channel volume $V$ and the volume flow $\dot{V}$.
-with allowance for the current density. When the residence time calculated equals the
-metering time calculated, the residence time and the injection time will be added.
+The minimum residence time results in:
-This procedure is continued until the screw tip is reached.
+$$\frac{t_{min}}{\bar{t}}=\frac{\dot{\pi}_m^{0,23(1-n)}}{2(1,249-0,589n)}$$
+with the [[en:berechnungen:schlepp-druckstroemung|dimensionless mass throughput]] $\dot{\pi}_m$ and the [[en:materialdaten:rheologische_materialdaten|Flow law exponents n]].
+**PSI only:** As soon as the calculated dwell time is equal to the dosing time, the standstill time and the injection time are added to it. This procedure is continued until the screw peak is reached.
 ===Further topics===
   * [[en:berechnungen:einfache_berechnung|]]
+  * [[en:berechnungen:prozess_iterieren]]
   * [[en:berechnungen:durchsatz|]]
   * [[en:berechnungen:druckverlauf|]]
@@ Zeile 22: / Zeile 30: @@
   * [[en:berechnungen:temperaturverlauf|]]
   * [[en:berechnungen:leistung_und_schubspannungen|]]
+  * [[en:berechnungen:schergeschwindigkeit]]
   * [[en:berechnungen:verweilzeit|]]
   * [[en:berechnungen:verweilzeitverteilung|]]