Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | |||
| en:berechnungen:verweilzeitverteilung [2025/01/13 18:21] – neelest | en:berechnungen:verweilzeitverteilung [2026/09/17 10:08] (aktuell) – gelöscht - Externe Bearbeitung (Unbekanntes Datum) 127.0.0.1 | ||
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| - | =====Mixed indicators===== | ||
| - | In the[[en: | ||
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| - | ===== Transverse mixing ratio ===== | ||
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| - | The transverse mixing ratio $\pi_{LSM}$ is calculated as follows: | ||
| - | $$\pi_{LSM} = \left[ 1 + \left(c_0 \overline{\gamma} \right)^2 \right]^{-1/ | ||
| - | $$\text{with}$$ | ||
| - | $$\overline{\gamma} = \frac{2 \left(1.03 + 0.074n \right) L}{\cos\varphi \sin\varphi} \cdot \frac{1}{h_1 \, \pi_\dot{m}}$$ | ||
| - | $$\text{and}$$ | ||
| - | $$c_0 = c_1 \sqrt{\frac{h_1}{h_0}} \left(\frac{T_z}{T_0}\right)^{c_2} \frac{n^{c_3}}{\pi_\dot{m}}$$ | ||
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| - | with c1=0.08367, c2=0.7067 and c3=0.344 | ||
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| - | ===== Longitudinal mixing ratio ===== | ||
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| - | The longitudinal mixing ratio $\sigma^2$ is calculated as follows | ||
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| - | $$\sigma^2 = 1 + \exp(c_1 \Theta_{min}^{c_2}) - \exp(c_3 \Theta_{min})$$ | ||
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| - | with the dimensionless minimum residence time $\Theta_{min} = \frac{t_{min}}{\bar{t}}$ and | ||
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| - | ^ extruder type ^ c1 ^ c2 ^ c3 ^ | ||
| - | | melt extruder | 0.2476 | 0.6014 | 0.8301 | | ||
| - | | Conv. plasticising extruder | -4.8828 | 2.1287 | 0.0028505 | | ||
| - | | grooved barrel extruder | -2.368 | 1.1268 | 0.1186 | | ||
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| - | ===== Agglomerate size reduction ===== | ||
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| - | The agglomerate size reduction ratio $Z$ is calculated as follows: | ||
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| - | $$Z=\left[ 1+\left( \frac{t}{c_{31}}\right)^{c_{21}}\left( ln\left( \frac{\tau}{\tau_{min}}\right)\right)^{1/ | ||
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| - | with the current shear stress $\tau$, the minimum shear stress $\tau_{min}$ and the three decay constants $c$. The minimum shear stress and the three decay constants are Material parameters. REX offers default values at the push of a button. | ||
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| - | ===Further topics=== | ||
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