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Some problems of hydrodynamics of two-phase flow mixtures in minichannels

Wengel M., Miłaszewicz B., Ulbrich R.

Archives of Thermodynamics

2014

Vol. 35, no. 2

93--101

Gas-liquid two-phase flow in minichannels has been the subject of increased research interest in the past few years. Evaluation, however, of today's state of the art regarding hydrodynamics of flow in minichannels shows significant differences between existing test results. In the literature there is no clear information regarding: defining the boundary between minichannels and conventional channels, labelling of flow patterns. The review of literature on the hydrodynamics of gas-liquid flow in minichannels shows that, despite the fact that many research works have been published, the problem of determining the effect of diameter of the minichannel on the hydrodynamics of the flow is still at an early stage. Therefore, the paper presents the results of research concerning determination of flow regime map for the vertical upward flow in minichannels. The research is based on a comprehensive analysis of the literature data and on the research that has been carried out. Such approach to the mentioned above problems concerning key issues of the two-phase flow in minichannels allowed to determine ranges of occurrence of flow structures with a relatively high accuracy.

Wykorzystanie metod rozpoznawania obrazu do oceny nierównomierności rozpływu mieszaniny dwufazowej gaz - ciecz w układach kanałów współpracujących

Pyka I., Ulbrich R.

Inżynieria i Aparatura Chemiczna

2006

Nr 6s

200-201

The paper presents a problem of the flow irregularity in a multi-pipe apparatus using the digital image processing method. The grey level value of recordings obtained in gas - liquid flow was a basic parameter for process investigation and allowed one to identify two-phase flow structures. The research results were presented on a flow map.