TY - GEN
T1 - Measurement of local void fraction of bubbly flows generated by breaking waves
AU - Huang, Ching Jer
AU - Lin, Yann Tesrn
AU - Tien, Tsung Mo
PY - 2012/9/17
Y1 - 2012/9/17
N2 - This work presents a novel fiber-optic sensing system to measure the local air-volume (void) fraction of bubbly flows caused by breaking waves near a submerged breakwater. Initially, a sensing system with a single fiber-optic probe is developed to detect the local void fractions of bubbly flows. The rating curve between the time fraction ratio of the bubble signal and the void fraction is then established by performing calibration experiments in a cylindrical tank. The high correlation coefficient between the time fraction ratio and the void fraction suggests that the proposed fiber-optic sensing system can measure local void fractions in the range of 1 % to 16 %. Additionally, based on the proposed system the bubbly flows near a submerged breakwater caused by breaking waves are investigated. Effects of different variables on the distribution of void fraction at the lee side of breakwater are systematically studied. These variables include the incident wave height, period and width of the breakwater.
AB - This work presents a novel fiber-optic sensing system to measure the local air-volume (void) fraction of bubbly flows caused by breaking waves near a submerged breakwater. Initially, a sensing system with a single fiber-optic probe is developed to detect the local void fractions of bubbly flows. The rating curve between the time fraction ratio of the bubble signal and the void fraction is then established by performing calibration experiments in a cylindrical tank. The high correlation coefficient between the time fraction ratio and the void fraction suggests that the proposed fiber-optic sensing system can measure local void fractions in the range of 1 % to 16 %. Additionally, based on the proposed system the bubbly flows near a submerged breakwater caused by breaking waves are investigated. Effects of different variables on the distribution of void fraction at the lee side of breakwater are systematically studied. These variables include the incident wave height, period and width of the breakwater.
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M3 - Conference contribution
AN - SCOPUS:84866118985
SN - 9781880653944
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 1218
EP - 1222
BT - Proceedings of the 22nd (2012) International Offshore and Polar Engineering Conference
T2 - 22nd International Offshore and Polar Engineering Conference, ISOPE-2012
Y2 - 17 June 2012 through 22 June 2012
ER -