LABORATORY AND FIELD EXPERIMENTS AND DEVELOPMENT OF NUMERICAL NUMERICAL MODEL FOR 3-D FLUID MOTION AND SEDIMENT MOVEMENT DUE TO WAVE BREAKING

波浪破碎引起的 3 维流体运动和沉积物运动的室内和现场实验以及数值模型的开发

基本信息

  • 批准号:
    13450203
  • 负责人:
  • 金额:
    $ 9.79万
  • 依托单位:
  • 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

项目摘要

TWO-DIMENSIONAL SUSPENDED SEDIMENT DISTRIBUTION CAUSED BY WAVE BREAKING ON A SLOPE WAS MEASURED IN A LABORATORY WAVE FLUME BY USING A CT TYPE SEDIMENT METER. THE 2-DIMENSIONAL SEDIMENT CONCENTRATION WAS OBTAINED FROM ATTENUATION RATE OF TRANSMITTED LASER POWER. IT WAS CONFIRMED THAT CONCENTRARION CAN BE QUANTITATIVELY EVALUATED. SIZE AND MOVEMENT OF SUSPENDED SEDIMENT CLOUDS WERE INVESTIGATED.THREE-DIMENSIONAL FLUID MOTION CAUSED BY WAVE BREAKING WAS MEASURED IN A LARGE WAVE FLUME BY USING AN ARRAY OF ACOUSTIC DOPPELAR VELOCIMETERS. VELOCITY VECTORS AND VORTICITY WERE CALCULATED FROM MEASURED DATA. TURBULENCE BY LOCAL EDDIES AND TURBULENCE PROPERTIES WERE INVESTIGATED. IT WAS FOUND THAT STRENGTH OF HORIZONTAL VORTICES INCREASE, THEN DECREASE WITH BREAKING WAVE PROPAGATION AND VERTICAL VORTICES ARE RELATIVELY WEAK NEAR THE BREAKING POINTS. VORTICITY BECOMES HOMOGENIOUS IN THE INNER SURF ZONE.IN ORDER TO EVALUATE INTERMITTENCY AND THREE-DIMENSIONALITY OF ORGANIZED EDDIES IN THE SURF ZONE, FIELD EXPERIMENTS WERE CONDUCTED WITH AN OBSERVATION ARRAY OF VELOCIMETERS AND SEDIMENT METERS. IT WAS FOUND THAT VELOCITY ACCERELATION AND TURBULENCE SHOW HIGH CORRELALTION AND CORRELATION BETWEEN THESE PROPERTIES AND SEDIMENT CONCENTRAION IS ALSO HIGH. INTERMITTENCY OF SEDIMENT PICKUP BY WAVE BREAKING WAS SHOWN AND THE PICKUP EVENTS COULD BE DETECTED BY FLUID VELOCITY AND ACCERELATION.
在实验室波浪水槽中,用CT型悬沙仪测量了波浪破碎时坡面上的二维悬沙分布。沉积物的二维浓度由发射激光功率的衰减率得到。经确认,浓度可定量降低。本文研究了悬沙云的大小和运动,并在大型波浪水槽中用声学多普勒流速计阵列测量了波浪破碎引起的三维流体运动。根据实测数据计算了涡度矢量和涡度。通过湍流度和湍流特性进行了分析。结果表明,随着破碎波的传播,水平涡的强度先增大后减小,而在破碎点附近,垂直涡的强度相对较弱。涡度在内表带变得均匀,为了揭示内表带有组织涡度的间歇性和三维性,用涡度计和沉积物计的观测阵列进行了野外试验。结果表明,流速、流速和紊动度具有很强的相关性,与含沙量的相关性也很强。波浪破碎对泥沙的挟沙作用具有间歇性,可以通过流体的运动速度和加速度来检测。

项目成果

期刊论文数量(42)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
鈴木崇之, 岡安章夫, 田中真史: "緩傾斜護岸の越波水理特性実験とLES数値計算"海岸工学論文集. 第50巻(印刷中). (2003)
Takayuki Suzuki、Akio Okasu、Masashi Tanaka:“缓坡海堤漫溢水力特性实验和 LES 数值计算”海岸工程论文第 50 卷(出版中)。
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    0
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Y. Uno, A. Okayasu, T. Kobayashi, M. Shimaya: "Experimental Study on Suspended Sediment Distribution in Surf Zone by a CT-Type Concentration Meter"Proceedings of Coastal Engineering, JSCE. 49. 431-435 (2002)
Y. Uno、A. Okasu、T. Kobayashi、M. Shimaya:“用 CT 型浓度计进行冲浪区悬浮沉积物分布的实验研究”海岸工程学报,JSCE。
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    0
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T.Suzuki, A.Okayasu, D.T.Cox, H.Katayama, N.Mori: "Field Measurement on Intermittent Sediment Suspension and Fluid Motion due to Wave Breaking"Coastal Sediments '03, ASCE. (CD-ROM). (2003)
T.Suzuki、A.Okayasu、D.T.Cox、H.Katayama、N.Mori:“由于波浪破碎导致的间歇性沉积物悬浮和流体运动的现场测量”沿海沉积物 03,ASCE。
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    0
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N. Mori, K. Matsuno, A. Okayasu, H. Katayama, M. Ikeno: "Measurements of 3-D Local Vorticity in a Large-Scale Wave Flume"Proceedings of Coastal Engineering, JSCE. 48. 86-90 (2001)
N. Mori、K. Matsuno、A. Okasu、H. Katayama、M. Ikeno:“大型波水槽中 3-D 局部涡度的测量”海岸工程论文集,JSCE。
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    0
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T. Suzuki, A. Okayasu, D. T. Cox, H. Katayama, N. Mori: "Field Measurement on Intermittent Sediment Suspension and Fluid Motion due to Wave Breaking"Coastal Sediments '03, ASCE. CD-ROM. (2003)
T. Suzuki、A. Okasu、D. T. Cox、H. Katayama、N. Mori:“由于波浪破碎导致的间歇性沉积物悬浮和流体运动的现场测量”沿海沉积物 03,ASCE。
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OKAYASU Akio其他文献

SCENARIO ANALYSIS OF TSUNAMI HUMAN DAMAGE BY USING CROWDED EVACUATION MODEL
利用拥挤疏散模型对海啸人员伤亡进行情景分析
子育て世帯の住環境を考える-洛西ニュータウンにおける子育ての現場から-
对育儿家庭生活环境的思考 - 从乐西新城育儿的角度 -
  • DOI:
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    0
  • 作者:
    KITAMURA Fukutaro;INAZU Daisuke;IKEYA Tsuyoshi;OKAYASU Akio;高田光雄
  • 通讯作者:
    高田光雄
Development of Organoplatinum(II) Complexes Exhibiting Efficient Excimer-Based Phosphorescence towards OLED Application
开发具有高效准分子磷光性的有机铂 (II) 配合物,用于 OLED 应用
  • DOI:
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    0
  • 作者:
    SUZUKI Shotaro;OKAYASU Akio;UNO Yoshiyuki;INAZU Daisuke;IKEYA Tsuyoshi;Shigeyuki Yagi
  • 通讯作者:
    Shigeyuki Yagi
ハライド系ペロブスカイトの電気輸送特性と化学的安定性:イオン伝導性の影響
卤化物钙钛矿的电传输特性和化学稳定性:离子电导率的影响
  • DOI:
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    0
  • 作者:
    SUZUKI Shotaro;OKAYASU Akio;UNO Yoshiyuki;INAZU Daisuke;IKEYA Tsuyoshi;Shigeyuki Yagi;山口 周,Wang Kai
  • 通讯作者:
    山口 周,Wang Kai
DEVELOPMENT OF EVACUATION ROUTE AND SHELTER ALLOCATION TOOL CONSIDERING INUNDATION OF TSUNAMI
考虑海啸淹没的疏散路线和避难所分配工具的开发

OKAYASU Akio的其他文献

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{{ truncateString('OKAYASU Akio', 18)}}的其他基金

Development of a Sediment Pickup Function with Effect of External Turbulence and Integrated Model for Sediment Transport
具有外部湍流影响的泥沙拾取功能和泥沙输送综合模型的开发
  • 批准号:
    21560534
  • 财政年份:
    2009
  • 资助金额:
    $ 9.79万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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