Large eddy simulation (        <fc xmlns='http://www.wiley.com/namespaces/wiley'>LES</fc>LES        ) of wind‐driven circulation in a peri‐alpine lake: Detection of turbulent structures and implications of a complex surrounding orography

Santo Marco A.; Toffolon Marco; Zanier Giulia; Giovannini Lorenzo; Armenio Vincenzo

摘要

Abstract >We investigate wind‐driven circulation in a peri‐alpine lake (Lake Ledro ‐ Italy) using LES‐COAST. Lake Ledro is interesting because its own dimensions are suited for LES and it is surrounded by complex orography, affecting wind distribution. We consider the winter condition when stratification is nearly absent. Two types of time‐varying wind stress are used: spatially homogeneous and spatially inhomogeneous respectively. The analysis of the eddy viscosities shows substantial differences with respect to the ocean case characterized by absence of coastal boundaries and homogeneous, steady wind. The quantities exhibit a noticeable inhomogeneous behavior: the horizontal eddy viscosity is larger in the water body far from the boundaries, whereas the vertical one is larger close to the lateral boundaries due to the presence of a boundary layer. The energetic bottom boundary layer, typically occurring in lakes, is not present. This because of the intrinsic unsteadiness of the thermal wind blowing over the lake and due to the absence of large amplitude internal waves, the latter present only in case of stable stratification. In the inhomogeneous wind case, up‐welling and down‐welling areas are not confined along the shoreline only, but are also generated in the water body due to substantial horizontal velocity divergence, and turbulent mixing, quantified by eddy viscosities, TKE and its dissipation rate, appears enhanced with respect to the homogeneous wind case. Finally, downwelling/upwelling areas along the windward/leeward coastline respectively were observed, whose quantitative estimation may give explanation for the bloom of cyanobacteria at the lake surface observed in winter. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><abstract xmlns =“http://www.wiley.com/namespaces/wiley”type =“main”> <标题类型=“main”>抽象</ title> >我们使用LES-Coast调查佩里 - 高山湖（Lake Legro-Italy）的风力驱动。 Lake Ledro湖很有趣，因为它自己的尺寸适用于LES，它周围环绕着复杂的地形，影响风分配。当分层几乎没有时，我们考虑冬季条件。使用两种类型的时变风应力：分别是空间均匀的和空间不均匀。涡粘度的分析表明，由于缺乏沿海边界和均匀的，稳定的风，其特征的海洋病例具有显着差异。数量表现出明显的不均匀行为：水平涡流在远离边界的水体中较大，而由于边界层的存在，垂直的垂直靠近横向边界。通常在湖泊中发生的能量底部边界层不存在。这是因为在湖上吹出的热风的内在不稳定，并且由于没有大的振幅内波，后者仅存在于稳定分层的情况下。在不均匀的风壳中，上升和吹水区域不仅沿着海岸线限制，而且由于大量水平速度分歧，并且通过涡粘度，TKE量化的湍流混合而在水体中产生速率，相对于均匀的风壳出现增强。最后，分别观察到沿着迎风/背风海岸线的沉船/上升区域，其定量估计可以给出冬季观察到的湖面上的蓝细菌的绽放。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34643/'>《Journal of Geophysical Research, C. Oceans: JGR》</a> <b style="margin: 0 2px;">|</b><span>2017年第6期</span><b style="margin: 0 2px;">|</b><span>共19页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Santo Marco A.&option=202" target="_blank" rel="nofollow">Santo Marco A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Toffolon Marco&option=202" target="_blank" rel="nofollow">Toffolon Marco;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zanier Giulia&option=202" target="_blank" rel="nofollow">Zanier Giulia;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Giovannini Lorenzo&option=202" target="_blank" rel="nofollow">Giovannini Lorenzo;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Armenio Vincenzo&option=202" target="_blank" rel="nofollow">Armenio Vincenzo;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Engineering and ArchitectureUniversity of TriesteTrieste Italy;</p> <p>Department of Civil Environmental and Mechanical EngineeringUniversity of TrentoTrento Italy;</p> <p>Iefluids s.r.l.Trieste Italy;</p> <p>Department of Civil Environmental and Mechanical EngineeringUniversity of TrentoTrento Italy;</p> <p>Department of Engineering and ArchitectureUniversity of TriesteTrieste Italy;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=wind‐driven circulation&option=203" rel="nofollow">wind‐driven circulation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=numerical model&option=203" rel="nofollow">numerical model;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=turbulent mixing&option=203" rel="nofollow">turbulent mixing;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=large eddy simulation&option=203" rel="nofollow">large eddy simulation;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=hydrodynamics&option=203" rel="nofollow">hydrodynamics;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=wind inhomogeneity&option=203" rel="nofollow">wind inhomogeneity;</a> </p> <div class="translation"> 机译：风力驱动循环;数值模型;湍流混合;大涡模拟;流体动力学;风不均匀性; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025579150.html">Large eddy simulation ( <fc xmlns="http://www.wiley.com/namespaces/wiley">LES</fc>LES ) of wind‐driven circulation in a peri‐alpine lake: Detection of turbulent structures and implications of a complex surrounding orography</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Santo Marco A.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Santo Marco A.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Toffolon Marco&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Toffolon Marco,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zanier Giulia&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Zanier Giulia,</a> <a href="/journal-foreign-34643/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of Geophysical Research, C. 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Large eddy simulation ( LESLES ) of wind‐driven circulation in a peri‐alpine lake: Detection of turbulent structures and implications of a complex surrounding orography

摘要