文献类型：期刊文献

中文题名：波浪破碎气体的卷入过程及相关统计量的估计

英文题名：Air bubble entrainment by breaking waves and estimation of the related statistical quantities

作者：张书文[1]

机构：[1]广东海洋大学南海海洋环境研究所,湛江524088

年份：2008

卷号：57

期号：5

起止页码：3287

中文期刊名：物理学报

外文期刊名：Acta Physica Sinica

收录：SCI-EXPANDED(收录号：WOS:000256262700106)、CSTPCD、、北大核心2004、Scopus、CSCD2011_2012、WOS、北大核心、CSCD

基金：国家自然科学基金(批准号:40576021)资助的课题~~

语种：中文

中文关键词：波浪破碎能量耗散;气泡云卷入深度;气泡粒径谱

外文关键词：energy loss from wave breaking, bubble plume penetration depth, bubble size spectrum

中文摘要：基于实验观测,导出了波浪破碎能量耗散εed、气泡云卷入深度zb、气体卷入速率Q(z)和湍流动能耗散率εT(z)的表达式,在此基础上建立了一种简单、实用的气泡粒径谱参数化模式N(a,z),揭示了波浪破碎气泡云卷入过程能量耗散、气泡破碎临界Hinze特征尺度和气泡粒径谱在不同海况下的变化.研究表明:气泡云卷入过程能量耗散率与波浪破碎能量耗散之比在中低风速下介于10%与60%之间,但当风速大于15m/s时,这一比值小于5%.气泡破碎临界Hinze特征尺度,随着风速的增大和波浪的不断成长向低频区移动.气泡粒径谱主要取决于海面气体卷入速率、湍流动量耗散率和破碎面积比,且敏感地依赖于风速和波浪成长状态.

外文摘要：Based on the experiments, the energy loss from wave breaking εed, the bubble plume penetration depth zb , the rate of air entrainment Q（z）, and the turbulent kinetic energy dissipation rate εT （z） are estimated in this study. As a consequence, a simple bubble size spectrum model N （ a, z） is proposed and the rate of energy dissipation due to air bubble entrainment and bubble fragment Hinze scale and bubble size spectrum are investigated under different sea states. It is indicated that the rate of energy dissipation due to air bubble entrainment ranges from 0. 1 to 0. 6 in low and moderate sea states, but may be negligible in the high sea state. Bubble fragment Hinze scale downshifts to the lower-frequency band as wind speed increases. Bubble size spectrum not only depends on the rate of air entrainment, the breaking rate, and the turbulent kinetic energy dissipation rate, but also strongly on the wind and sea state.