RT Journal Article ID 43c375457cb57f2d A1 Kumara, W. A. S. A1 Halvorsen, B. M. A1 Melaaen, M. C. T1 PARTICLE IMAGE VELOCIMETRY, GAMMA DENSITOMETRY, AND PRESSURE MEASUREMENTS OF OIL-WATER FLOW JF Multiphase Science and Technology JO MST YR 2009 FD 2009-05-29 VO 21 IS 1-2 SP 51 OP 64 AB Oil-water flow in a horizontal pipe was investigated using particle image velocimetry (PIV), gamma densitometry, and pressure measurements. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The multiphase flow loop consisted of a 15-m-long steel pipe with an inner diameter of 56 mm. Water (density 996 kg/m3, viscosity 1 mPa s) and Exxsol D60 oil (density 790 kg/m3, viscosity 1.6 mPa s) were used as test fluids. The experiments were performed at different mixture velocities and water cuts. Mixture velocity and water cut varied up to 1.06 m/s and 1.0, respectively. The time-averaged cross-sectional distributions of oil and water were measured using a traversable gamma densitometer. The pressure drop along the test section of the pipe was also measured. The flow regimes were determined by visual observations. The instantaneous local velocities were measured using PIV, and based on the instantaneous local velocities mean velocities and turbulence profiles were calculated. The highest root mean-squared velocity components of streamwise (U-rms) and wall normal (V-rms), and Reynolds stress values were observed close to the pipe wall due to large mean axial velocity gradients. A damping effect of the Reynolds stress was observed close to the oil-water interface due to stable density stratification. PIV measurements are compared with laser doppler anemometry (LDA) measurements that were performed on a similar experimental setup by Elseth et al. (2000). The measured mean axial velocity and turbulence profiles using PIV are observed to compare favorably with LDA measurements. PB Begell House LK https://www.dl.begellhouse.com/journals/5af8c23d50e0a883,3003408060e425f0,43c375457cb57f2d.html