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Multiphase Science and Technology

Выходит 4 номеров в год

ISSN Печать: 0276-1459

ISSN Онлайн: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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EXPERIMENTS ON THE TURBULENT STRUCTURE AND THE VOID FRACTION DISTRIBUTION IN THE TAYLOR BUBBLE WAKE

Том 17, Выпуск 1-2, 2005, pp. 103-122
DOI: 10.1615/MultScienTechn.v17.i1-2.60
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Краткое описание

An experimental approach is developed to carry out PIV measurements and to perform digital processing of the recorded PIV images to measure simultaneously the instantaneous turbulent velocity field and the void fraction distribution in the wake region of a Taylor bubble. Advanced methods of data processing, such as ensemble averaging and Proper Orthogonal Decomposition (POD), are applied. Results of measurements performed in our newly constructed experimental facility are presented. Two liquid flow rates were employed, corresponding to Reynolds numbers of 820 for laminar background flow and 7500 for turbulent flow. The mean characteristics of the velocity field in the wake region are calculated by ensemble-averaging the instantaneous velocity fields measured around 200 different bubbles. An algorithm to estimate the void fraction distribution in the axial pipe cross-section from the recorded PIV images is developed.

ЦИТИРОВАНО В
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