Govender, KAlport, MJMocke, GMichallet, H2007-06-292007-06-292002Govender, K et al. 2002. Video measurements of fluid velocities and water levels in breaking waves. Physica Scripta, Vol. T97, pp 152-1590031-8949http://hdl.handle.net/10204/734Copyright: 2002 Royal Swedish Academy of SciencesThe cost-effective measurement of the velocity flow fields in breaking water waves, using particle and correlation image velocimetry, is described. The fluid velocities are estimated by tracking the motion of neutrally buoyant particles and aeration structures. Results of the phase-ensemble-averaged velocity flow fields, time-averaged horizontal velocities and turbulence results are presented for laboratory waves breaking on a beach of slope 1:20 and for waves breaking over a submerged bar. A comparison of measurements using video and LDA techniques is also presented. The measurement of water levels and wave roller structures is accomplished by generating a video time series of the wave at a given horizontal position, from which the water levels and rollers structures are extracted.enLDALaser doppler anemometryVelocity flowBreaking water wavesImage velocimetryVideo measurementsWater levelsArticleGovender, K., Alport, M., Mocke, G., & Michallet, H. (2002). Video measurements of fluid velocities and water levels in breaking waves. http://hdl.handle.net/10204/734Govender, K, MJ Alport, G Mocke, and H Michallet "Video measurements of fluid velocities and water levels in breaking waves." (2002) http://hdl.handle.net/10204/734Govender K, Alport M, Mocke G, Michallet H. Video measurements of fluid velocities and water levels in breaking waves. 2002; http://hdl.handle.net/10204/734.TY - Article AU - Govender, K AU - Alport, MJ AU - Mocke, G AU - Michallet, H AB - The cost-effective measurement of the velocity flow fields in breaking water waves, using particle and correlation image velocimetry, is described. The fluid velocities are estimated by tracking the motion of neutrally buoyant particles and aeration structures. Results of the phase-ensemble-averaged velocity flow fields, time-averaged horizontal velocities and turbulence results are presented for laboratory waves breaking on a beach of slope 1:20 and for waves breaking over a submerged bar. A comparison of measurements using video and LDA techniques is also presented. The measurement of water levels and wave roller structures is accomplished by generating a video time series of the wave at a given horizontal position, from which the water levels and rollers structures are extracted. DA - 2002 DB - ResearchSpace DP - CSIR KW - LDA KW - Laser doppler anemometry KW - Velocity flow KW - Breaking water waves KW - Image velocimetry KW - Video measurements KW - Water levels LK - https://researchspace.csir.co.za PY - 2002 SM - 0031-8949 T1 - Video measurements of fluid velocities and water levels in breaking waves TI - Video measurements of fluid velocities and water levels in breaking waves UR - http://hdl.handle.net/10204/734 ER -