Detailed investigations of the multiphase flow in airlift tower loop reactors

✍ Scribed by A. Lübbert; B. Larson

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 802 KB
• Volume: 45
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(90)80051-f

✦ Synopsis

A measuring technique has been developed to investigate the local mixing behaviour of the continuous liquid phase of multiphase flows on the centimeter scale. Essentially it is a time-of-flow measurement which is based on a stimulus-response technique, using heat instead of a material tracer. To obtain high signal-to-noise ratios, pseudo-random marking signals were applied. Since the technique is a model-aided measuring method, some published mixing models have been tested. By investigating the twophase flow within the riser of an airlift tower loop reactor, the performance of the technique has been demonstrated. In the literature, the flow within airlift reactors under the conditions investigated here is usually assumed to obey the laws of local isotropic statistical turbulence. Our measured data, however, do not support this assumption, although in a visual inspection the flow appears to be chaotic.