Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v3.i4.60
pages 311-318

BUBBLY FLOW DYNAMICS STRUCTURE USING PARTICLE IMAGE VELOCIMETRY

Yassin A. Hassan
Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA
William D. Schmidt
Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA
Javier Ortiz-Villafuerte
Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA

ABSTRAKT

Particle image velocimetry (PIV) is a nonintrusive measurement technique that can be used to study the structure of various fluid flows. PIV is used to measure the time-varying full-field velocity data of a particle-seeded flow field within either a two-dimensional plane or three-dimensional volume. PIV is a very efficient measurement technique because it can obtain both qualitative and quantitative spatial information about the flow field being studied. This information can be processed further into information such as vorticity and pathlines and turbulence over extended areas. Other flow measurement techniques (Laser Doppler Velocimetry, Hot Wire Anemometry, etc.) only provide quantitative information at a single point. PIV can be used to study turbulence structures if a sufficient amount of data can be acquired and analyzed, and it can also be extended to study two-phase flows if both phases can be distinguished. In this study, the flow structure around a bubble rising in a pipe filled with water was studied in three-dimensions. The velocity of the rising bubble and the. velocity field of the surrounding water was measured. Then the turbulence intensities and Reynolds stresses were calculated from the experimental data.