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海洋温盐驱动双扩散对流
浏览次数:
speaker:
杨延涛
place:
物理学院北547室(腾讯会议ID 524 8572 3517)
time:
2020年12月9日,15:00—16:00
由两种非均匀分布的组分驱动的浮力对流湍流,即双扩散对流,广泛存在 于众多自然界和工程流动中。在地球海洋环境中,海水的密度主要受温度和盐度影响,因此双扩散对流现象广泛存在,且是影响热量和物质垂直输运的重要机制之一。本报告首先介绍双扩散对流的基本概念及其在海洋中的典型流动形态,即所谓温盐台阶流态。随后介绍关于亚热带和极地海域两种不同典型台阶流态的数值模拟工作,包括台阶流态的分层及多态现象,以及温盐台阶的热量和盐度的传输规律。
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