Mass transfer between a flat surface and a falling liquid film

✍ Scribed by H. Kramers; P.J. Kreyger

• Publisher: Elsevier Science
• Year: 1956
• Tongue: English
• Weight: 520 KB
• Volume: 6
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(56)80009-2

✦ Synopsis

Measurements have been performed on the rate of solution of rather short surfaces of benzoic acid in a water Alm in 1,aminar and turbulent flow. For the experimental conditions this process may be treated as the diffusion of solute from a plane surface into a laminar liquid flow with a constant velocity gradient. A reasonable agreement is found between the velocity gradients derived from the measurements and those which follow from otherwise known charactersitics of falling films. RBsum&-On a mesure la vitesse de dissolution dans un film d'eau, de plaquettes d'acide benzo1que. On a op& dans lea domaines d'dcoulement laminaire et turbulent. Hans lee conditions experimentales realis&, ce probleme peut etre trait6 comme la diffusion d'un solute a partir d'un plan B travers une couche laminaire ir gradient de vitesse constant. Les valeurs du gradient de vitesse calculQs h partir de ces experiences sont en bon accord avec celles que l'on peut deduire des au&s caracteristiques des Alms tombants. 1.