Research and Development of a Hybrid Ocean Model for analysis of flows and diffusions around artificial structures in the coastal seas

研究和开发混合海洋模型，用于分析沿海人工结构周围的流动和扩散

• 批准号: 13555274
• 负责人: KYOZUKA Yusaku
• 金额: $ 6.14万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555274/
• 关键词: Multi-scale ocean model; Hybrid ocean model; Flow and diffusion; Enclosed sea; Coastal sea; Purification apparatus; Nesting model; Physical environment; 多層モデル; バリアブルメッシュモデル; ネスティングメッシュモデル; 境界適合座標モデル; 数値生態系モデル; マルチスケール流動シュミレータ

Outbreaks of red tide caused by the eutrophication are frequently reported around the coastal seas of Japan in recent years. They lead the water degradation of the sea and the coastal ecosystem is strongly damaged by the oxygen deficient water.Purpose of the development of a new ocean model is that we are interested in not only the analysis of the ocean environment but also the control of the ocean environment by manmade structures and apparatus. This requires a new model applicable in two different scales, small scale around such structures and large scale in the ocean. We have developed a hybrid model which consists of two different methods, a full three-dimensional (3-D) analysis using fine meshes in small fluid domain and a hydrostatic analysis in wider ocean. Experts for both methods in the group could work cooperatively and effectively.In this study, we have developed a hybrid model as following sub-problems :(1) Mesh generation method in coastal seas of Japan(2) A hydrostatic model used for the wider seas(3) A full 3D model used for the narrow water sea(4) Parallel or nested calculations in both domains(5) Visualization of the resultsAs an application example, the effects of the "Density current generator" on the density stratification were demonstrated in Gokasho Bay. We are also preparing a research paper on an upwelling structure on the sea-bottom. We conducted ocean measurements in Ariake Sea for the validation of our numerical model, and the part of the results on the physical environments in Ariake Sea was reported at some academic societies.

近年来，日本近海频繁发生由富营养化引起的赤潮。海洋缺氧导致海水水质恶化，海岸带生态系统受到严重破坏，发展新的海洋模式的目的不仅是为了分析海洋环境，而且是为了利用人工结构和装置控制海洋环境。这就需要一个新的模型，适用于两个不同的尺度，小规模的结构周围和大规模的海洋。我们已经开发了一个混合模式，其中包括两种不同的方法，一个完整的三维（3-D）的分析，在小流体域使用细网格和流体静力学分析在更广泛的海洋。在本研究中，我们开发了一个混合模式，包括以下子问题：（1）日本近海的网格生成方法（2）适用于较宽海域的流体静力学模式（3）适用于窄水海域的全三维模式（4）两个域的并行或嵌套计算（5）结果的可视化作为应用实例，在五所湾演示了“密度流发生器”对密度分层的影响。我们还在编写一份关于海底涌升结构的研究论文。为了验证数值模式，我们在有明海进行了海洋测量，并在一些学术团体上报告了有明海物理环境的部分结果。

项目成果

北澤大輔 et al.: "メガフロート・フェーズII浮体の海洋生態系に与える影響に関する研究"日本造船学会論文集. Vol.190. 361-371 (2001)

Daisuke Kitazawa 等：“Megafloat II 期浮体对海洋生态系统的影响研究”日本造船学会汇刊 190. 361-371 (2001)。

D.Kitazawa et al.: "A study on the effects of an very large floating structure on marine ecosystem in Tokyo Bay"International Symposium on Ocean Space Utilization Technology. 285-292 (2003)

D.Kitazawa等：“东京湾超大型漂浮结构对海洋生态系统影响的研究”国际海洋空间利用技术研讨会。

z.Yu et al.: "Simplified Moving Boundary Treatment in MEC Model"MECモデルワークショップ(第3回). 145-157 (2002)

z.Yu 等人：“MEC 模型中的简化移动边界处理”MEC 模型研讨会（第 3 期）（2002 年）。

T.Sato et al.: "Numerical and Experimental Simulations of Effect of Purification Apparatus Set in Gokasyo-Bay"Proc. 12th Int. Soc. Offshore Polar Engng. Conf, Kitakyushu. 447-453 (2002)

T.Sato 等人：“Gokasyo-Bay 净化装置组效果的数值和实验模拟”Proc。

Yusaku Kyozuka: "Development and Applications of MEG Ocean Model, Its Feature and Activity of the Group"Techno-Ocean 2002, Nov. 20-22. (CD-ROM). (2002)

Yusaku Kyozuka：“MEG海洋模型的开发和应用、其特征和小组的活动”Techno-Ocean 2002年，11月20-22日。