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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Печать: 1065-3090
ISSN Онлайн: 1940-4336

Выпуски:
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Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v8.i2-3.130
10 pages

DISTRIBUTION OF COHERENT STRUCTURES IN TURBULENT PIPE FLOW

F. Schneider
Lehrstuhl fur Stromungslehre, Universitat Essen, D-45117 Essen, Germany
Wolfgang Merzkirch
Universitaet Duisburg-Essen Schwarzwaldstr. 18, 79102 Freiburg, Germany

Краткое описание

Planar particle image velocimetry (PIV) measurements were performed in fully developed turbulent pipe flow at Reynolds numbers of the order of 105. Coherent structures were identified in the fluctuation field by using the swirling strength as the identification criterion. A number of properties of these structures were determined for later use in a model describing the principle of the cross-correlation ultrasound flowmeter by means of an approach based on systems theory.


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