盐水排放到海洋的远场实验特征

IF 0.2 Q4 WATER RESOURCES
B. Pérez-Díaz , P. Palomar , S. Castanedo , A. Álvarez
{"title":"盐水排放到海洋的远场实验特征","authors":"B. Pérez-Díaz ,&nbsp;P. Palomar ,&nbsp;S. Castanedo ,&nbsp;A. Álvarez","doi":"10.1016/j.riba.2016.07.003","DOIUrl":null,"url":null,"abstract":"<div><p>Brine discharges are flows driven by the density difference between the environmental fluid, the seawater, and the discharge. They are generated by the rejected water of desalination plants, hence they are common in nature nowadays, and have a great impact on protected ecosystems. Two well-distinguished regions can be differentiated in the study of the behaviour of these discharges: the near field region, located in the vicinity of the discharge point and characterised by high dilution rates due to the turbulence effects; and the far field region, where the brine turns into a gravity current that flows down the seabed with low dilution rates. The behaviour of these gravity currents is dependent on the brine discharge characteristics, the bathymetry and the hydrodynamic conditions of the receiving water.</p><p>This work shows the experimental characterization of the far field region of brine discharges through advanced non-intrusive laser optical techniques PIV (Particle Image Velocimetry) and PLIF (Planar Laser Induced Fluorescence), under controlled laboratory conditions. By means of synchronized PIV-PLIF techniques, high-quality accurate instantaneous measurements of velocity and concentration are obtained. The aim of these experiments is to study the quasi-steady flow properties of gravity currents generated by a constant flux release mimicking the far field of brine discharges. Different experimental set-upswith different initial conditions (flow rate, thickness, slope, salt concentration) were carried out in a 3<!--> <!-->×<!--> <!-->3<!--> <!-->×<!--> <!-->1<!--> <!-->m tank. Through PIV-PLIF analysis, conclusions about the influence of these variables on the mixing at the interface between fluids have been obtained. As an example, keeping constant the rest of variables, steeper slopes and higher flow rates favour dilution, reaching stable entrainment values close to 5·10-2 against base case (with slope near zero and lower flow rate) values close to 2·10-2.</p><p>In addition, a high resolution and quality experimental database has been generated, which will allow to calibrate/validate both simplified tools, based on systems of integrated equations, and advanced hydrodynamic modelling tools.</p></div>","PeriodicalId":42124,"journal":{"name":"RIBAGUA-Revista Iberoamericana del Agua","volume":null,"pages":null},"PeriodicalIF":0.2000,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.riba.2016.07.003","citationCount":"0","resultStr":"{\"title\":\"Caracterización experimental del campo lejano de los vertidos de salmuera al mar\",\"authors\":\"B. Pérez-Díaz ,&nbsp;P. Palomar ,&nbsp;S. Castanedo ,&nbsp;A. Álvarez\",\"doi\":\"10.1016/j.riba.2016.07.003\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Brine discharges are flows driven by the density difference between the environmental fluid, the seawater, and the discharge. They are generated by the rejected water of desalination plants, hence they are common in nature nowadays, and have a great impact on protected ecosystems. Two well-distinguished regions can be differentiated in the study of the behaviour of these discharges: the near field region, located in the vicinity of the discharge point and characterised by high dilution rates due to the turbulence effects; and the far field region, where the brine turns into a gravity current that flows down the seabed with low dilution rates. The behaviour of these gravity currents is dependent on the brine discharge characteristics, the bathymetry and the hydrodynamic conditions of the receiving water.</p><p>This work shows the experimental characterization of the far field region of brine discharges through advanced non-intrusive laser optical techniques PIV (Particle Image Velocimetry) and PLIF (Planar Laser Induced Fluorescence), under controlled laboratory conditions. By means of synchronized PIV-PLIF techniques, high-quality accurate instantaneous measurements of velocity and concentration are obtained. The aim of these experiments is to study the quasi-steady flow properties of gravity currents generated by a constant flux release mimicking the far field of brine discharges. Different experimental set-upswith different initial conditions (flow rate, thickness, slope, salt concentration) were carried out in a 3<!--> <!-->×<!--> <!-->3<!--> <!-->×<!--> <!-->1<!--> <!-->m tank. Through PIV-PLIF analysis, conclusions about the influence of these variables on the mixing at the interface between fluids have been obtained. As an example, keeping constant the rest of variables, steeper slopes and higher flow rates favour dilution, reaching stable entrainment values close to 5·10-2 against base case (with slope near zero and lower flow rate) values close to 2·10-2.</p><p>In addition, a high resolution and quality experimental database has been generated, which will allow to calibrate/validate both simplified tools, based on systems of integrated equations, and advanced hydrodynamic modelling tools.</p></div>\",\"PeriodicalId\":42124,\"journal\":{\"name\":\"RIBAGUA-Revista Iberoamericana del Agua\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.2000,\"publicationDate\":\"2016-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.riba.2016.07.003\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"RIBAGUA-Revista Iberoamericana del Agua\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2386378116300196\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"WATER RESOURCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"RIBAGUA-Revista Iberoamericana del Agua","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2386378116300196","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"WATER RESOURCES","Score":null,"Total":0}
引用次数: 0

摘要

盐水排放是由环境流体、海水和排放物之间的密度差驱动的流动。它们是由海水淡化厂的废水产生的,因此它们在自然界中很常见,对受保护的生态系统有很大的影响。在对这些放电行为的研究中,可以区分出两个非常明显的区域:近场区域,位于放电点附近,由于湍流效应而具有高稀释率的特征;在远场区域,盐水变成了一股重力流,以低稀释率沿着海床流下。这些重力流的行为取决于盐水排放特性、水深和接收水的水动力条件。这项工作展示了在受控的实验室条件下,通过先进的非侵入式激光光学技术PIV(粒子图像测速)和PLIF(平面激光诱导荧光)对盐水放电远场区域的实验表征。通过同步PIV-PLIF技术,获得了高质量、精确的速度和浓度瞬时测量结果。这些实验的目的是研究模拟盐水排放远场的恒定通量释放产生的重力流的准稳态流动特性。在一个3 × 3 × 1 m的水槽中进行了不同初始条件(流量、厚度、坡度、盐浓度)的实验设置。通过PIV-PLIF分析,得出了这些变量对流体界面混合影响的结论。例如,保持其他变量不变,更陡的坡度和更高的流速有利于稀释,达到接近5·10-2的稳定夹带值,而基本情况(坡度接近零,流速较低)接近2·10-2。此外,还生成了一个高分辨率和高质量的实验数据库,它将允许校准/验证基于集成方程系统的简化工具和先进的流体动力学建模工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Caracterización experimental del campo lejano de los vertidos de salmuera al mar

Brine discharges are flows driven by the density difference between the environmental fluid, the seawater, and the discharge. They are generated by the rejected water of desalination plants, hence they are common in nature nowadays, and have a great impact on protected ecosystems. Two well-distinguished regions can be differentiated in the study of the behaviour of these discharges: the near field region, located in the vicinity of the discharge point and characterised by high dilution rates due to the turbulence effects; and the far field region, where the brine turns into a gravity current that flows down the seabed with low dilution rates. The behaviour of these gravity currents is dependent on the brine discharge characteristics, the bathymetry and the hydrodynamic conditions of the receiving water.

This work shows the experimental characterization of the far field region of brine discharges through advanced non-intrusive laser optical techniques PIV (Particle Image Velocimetry) and PLIF (Planar Laser Induced Fluorescence), under controlled laboratory conditions. By means of synchronized PIV-PLIF techniques, high-quality accurate instantaneous measurements of velocity and concentration are obtained. The aim of these experiments is to study the quasi-steady flow properties of gravity currents generated by a constant flux release mimicking the far field of brine discharges. Different experimental set-upswith different initial conditions (flow rate, thickness, slope, salt concentration) were carried out in a 3 × 3 × 1 m tank. Through PIV-PLIF analysis, conclusions about the influence of these variables on the mixing at the interface between fluids have been obtained. As an example, keeping constant the rest of variables, steeper slopes and higher flow rates favour dilution, reaching stable entrainment values close to 5·10-2 against base case (with slope near zero and lower flow rate) values close to 2·10-2.

In addition, a high resolution and quality experimental database has been generated, which will allow to calibrate/validate both simplified tools, based on systems of integrated equations, and advanced hydrodynamic modelling tools.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
审稿时长
42 weeks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信