INTEGRATED STUDY ON THE VELOCITY FIELD INDUCED BY PLUNGING BREAKERS

Proceedings of the International Conference on Coastal Engineering

Alec Torres-Freyermuth¹  Germán Daniel Rivillas²  Rodolfo Silva¹  Cesar Gutierrez¹  Adrián Pedrozo-Acuña¹ 

[1] UNAM UNIVERSITY

关键词: BIV;    RANS;    velocity fields;    breaking waves;    surf zone;    swash zone;   

DOI  :  10.9753/icce.v33.waves.27

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

In this investigation we employ a technique called Bubble Image Velocimeter (BIV) to obtain measurements of flow fields in the surf-zone. This technique allows measurements of flow velocity in the aerated breaking zone, where other techniques are ineffective. The technique has been widely used to study flow propagation in front of vertical structures, it is employed in this study to estimate the velocity field induced by the propagation of a plunging wave travelling over an impermeable slope. The BIV measurements were compared to those obtained with an Acoustic Doppler Velocimeter (ADV) showing that the BIV technique is more suitable when the velocity field is estimated under the presence of an aerated flow. Moreover, the phase-averaged velocity fields obtained from the numerical model were compared against those evaluated from the BIV measurements. A reliable estimation of the VOF-type numerical derivations in the surf zone was established. In the swash zone, an over prediction of the offshore flow was identified.

【 授权许可】

Unknown