Blasenbildung im verdampfenden Rieselfilm

Video in TIB AV-Portal: Blasenbildung im verdampfenden Rieselfilm

Formal Metadata

Blasenbildung im verdampfenden Rieselfilm
Alternative Title
Steam Bubbles in a Flowing Thin Film
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IWF Signature
E 1499
Release Date
Silent film
IWF (Göttingen)
Production Year

Technical Metadata

IWF Technical Data
Film, 16 mm, 68 m ; SW, 6 1/2 min

Content Metadata

Subject Area
Verhalten der Blasen im Rieselfilm bei glatter und welliger Strömung. Einfluß einer rauhen Rohroberfläche. Blasenkeimstellen bei Flächenerhitzung. Geschlossene Blasenschicht. Aufreißen des Rieselfilms bei starker Überhitzung. Mit Zeitdehnung.
In an evaporating trickling film steam bubbles can form by adequate fluid overheating. These occur in quick succession in suitable pittings in the heating surface, are torn away from the surface by the current, swim in or on the trickling film, getting larger until they burst. They blend the film considerably. Heat transfer to the latter is improved by the steam bubbles. In very slow motion the film shows the behaviour of the bubbles with calm and rippled current. The fluid flows on the outside of a heated test tube. Fluid and heating area loads are varied. The effect of a rough tube surface is also shown. With suitably high heating area load a continuous bubble layer occurs, which disperses with more intense overheating.
Keywords Wärmeaustauscher Verdampfung Verdampferanlage Strömung / Rieselfilmströmung Sieden Rieselfilmströmung Flüssigkeitsschichten Blasenbildung / Luft in Wasser bubble formation / air in water steam bubbles boiling flowing thin film evaporation heat exchanger Encyclopaedia Cinematographica
IWF Classification Technik Hydrodynamik Physik Technische Chemie Chemie chemistry technical chemistry physics hydrodynamics technology
Chemical experiment
Chemical compound