EXPERIMENTAL STUDY ON THE MOTION OF TURBIDITY CLOUDS PRODUCED IN A STAGNANT WATER

Motion of turbidity clouds propagating along the bottom boundary, that produced by instantaneous release of turbid water from water surface into a stagnant water, is investigated experimentally. A series of laboratory experiments is conducted by varying inflow condition as well as ambient water dept...

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Published inPROCEEDINGS OF HYDRAULIC ENGINEERING Vol. 44; pp. 1245 - 1250
Main Authors IDENO, Hajime, URA, Masaru, AKIYAMA, Juichiro, YING, Xinya, NAKANISHI, Yayoi
Format Journal Article
LanguageEnglish
Published Japan Society of Civil Engineers 2000
Subjects
experiment
gravity current
turbidity
turbulent thermal
water pollution
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ISSN0916-7374
1884-9172
DOI10.2208/prohe.44.1245

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Abstract Motion of turbidity clouds propagating along the bottom boundary, that produced by instantaneous release of turbid water from water surface into a stagnant water, is investigated experimentally. A series of laboratory experiments is conducted by varying inflow condition as well as ambient water depth. The motion of turbidity clouds is found to be distinguishied into two flow regions: the transition and gravity current region. The effects of inflow condition and ambient water depth on the motionof the clouds, and the relationships of the flow characteristics before and after impingement are investigated.
AbstractList Motion of turbidity clouds propagating along the bottom boundary, that produced by instantaneous release of turbid water from water surface into a stagnant water, is investigated experimentally. A series of laboratory experiments is conducted by varying inflow condition as well as ambient water depth. The motion of turbidity clouds is found to be distinguishied into two flow regions: the transition and gravity current region. The effects of inflow condition and ambient water depth on the motionof the clouds, and the relationships of the flow characteristics before and after impingement are investigated.
Author NAKANISHI, Yayoi
AKIYAMA, Juichiro
URA, Masaru
YING, Xinya
IDENO, Hajime
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  fullname: NAKANISHI, Yayoi
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References 1) 古土井光昭: 港湾工事における濁りの挙動に関する研究, 大阪大学学位論文, 1989.
10) 玉井昌宏・村岡浩爾・室田明・町田博紀: 土砂直投工における濁りの初期拡散過程関する研究, 土木学会論文集, No.515/II-31, pp.77-86, 1995.
8) Ying, X., Akiyama, J., Ura, M. and Nakanishi, Y. Large eddy simulation of heavy turbulent thermal, Annual J. of Hydraulic Engineering, Vol.43, pp.899-904, 1999.
3) Buhler, J. and Papantoniou, D.A.: Swarms ofcoarse particles falling through a fluid, Proc. ofthe Intl Symposium on Environmental Hydraulics, Vol.1, pp.135-140, 1991.
4) 秋山壽一郎・浦勝・応新亜・今宮盛雄・陶山正治: 静水中に瞬間的に投下された重たい流体塊の流動特性に関する研究, 水工学論文集第42巻, pp.529-534, 1998.
14) 秋山壽一郎・浦勝・応新亜・西森秀樹: 静水・流水中に瞬間的に投下された粒子群の流動特性, 水工学論文集, 第43巻, pp.905-910, 1999.
9) 小川元・竹内益雄: 土捨船による投棄土砂の分散土木学会論文集, 第161号, pp.39-49, 1969.
11) 玉井昌宏・村岡浩爾: 土砂直投工により発生する濁りの挙動特性に関する数値解析, 水工学論文集, 第42巻, pp.541-546, 1998.
5) 堀江毅: MAC法による直投土砂の初期拡散に関する数値解析, 運輸省港湾技術研究所技術資料, No.471, pp.1-34, 1983.
13) 秋山壽一郎・浦勝・応新亜・中西弥生: 静水中に瞬間的に投下された重い流体塊の底面衝突後の挙動, 水工学論文集, 第43巻pp.1115-1120, 1999.
15) Huppert, H. E. and Simpson, J. E.: The slumping of gravity current, T. of Fluid Mechanics, Vol.99, pp.785-799, 1980.
2) 玉井昌宏・村岡浩爾・室田明: 固体粒子群の落下挙動と誘起流動に関する研究, 土木学会論文集, No.509/II-30, pp.143-154, 1995.
6) Li, C. W.: Convection of particle thermals, J. of Hydraulic Research, Vol.35, No.3, pp.363-376, 1997.
7) 小田一紀・重松孝昌・大西伸幸・井上雅夫: 改良型DEMAC法による粒子群の沈降・分散挙動の解析, 海岸工学論文集, 第39巻, pp.971-975, 1992.
12) Ying. X., Akiyama, J. and Ura, M.: Motion of dense fluid released into quiescent water with finitedepth, 土木学会論文集 (in press).
References_xml – reference: 2) 玉井昌宏・村岡浩爾・室田明: 固体粒子群の落下挙動と誘起流動に関する研究, 土木学会論文集, No.509/II-30, pp.143-154, 1995.
– reference: 6) Li, C. W.: Convection of particle thermals, J. of Hydraulic Research, Vol.35, No.3, pp.363-376, 1997.
– reference: 13) 秋山壽一郎・浦勝・応新亜・中西弥生: 静水中に瞬間的に投下された重い流体塊の底面衝突後の挙動, 水工学論文集, 第43巻pp.1115-1120, 1999.
– reference: 14) 秋山壽一郎・浦勝・応新亜・西森秀樹: 静水・流水中に瞬間的に投下された粒子群の流動特性, 水工学論文集, 第43巻, pp.905-910, 1999.
– reference: 1) 古土井光昭: 港湾工事における濁りの挙動に関する研究, 大阪大学学位論文, 1989.
– reference: 3) Buhler, J. and Papantoniou, D.A.: Swarms ofcoarse particles falling through a fluid, Proc. ofthe Intl Symposium on Environmental Hydraulics, Vol.1, pp.135-140, 1991.
– reference: 10) 玉井昌宏・村岡浩爾・室田明・町田博紀: 土砂直投工における濁りの初期拡散過程関する研究, 土木学会論文集, No.515/II-31, pp.77-86, 1995.
– reference: 12) Ying. X., Akiyama, J. and Ura, M.: Motion of dense fluid released into quiescent water with finitedepth, 土木学会論文集 (in press).
– reference: 5) 堀江毅: MAC法による直投土砂の初期拡散に関する数値解析, 運輸省港湾技術研究所技術資料, No.471, pp.1-34, 1983.
– reference: 4) 秋山壽一郎・浦勝・応新亜・今宮盛雄・陶山正治: 静水中に瞬間的に投下された重たい流体塊の流動特性に関する研究, 水工学論文集第42巻, pp.529-534, 1998.
– reference: 15) Huppert, H. E. and Simpson, J. E.: The slumping of gravity current, T. of Fluid Mechanics, Vol.99, pp.785-799, 1980.
– reference: 11) 玉井昌宏・村岡浩爾: 土砂直投工により発生する濁りの挙動特性に関する数値解析, 水工学論文集, 第42巻, pp.541-546, 1998.
– reference: 8) Ying, X., Akiyama, J., Ura, M. and Nakanishi, Y. Large eddy simulation of heavy turbulent thermal, Annual J. of Hydraulic Engineering, Vol.43, pp.899-904, 1999.
– reference: 7) 小田一紀・重松孝昌・大西伸幸・井上雅夫: 改良型DEMAC法による粒子群の沈降・分散挙動の解析, 海岸工学論文集, 第39巻, pp.971-975, 1992.
– reference: 9) 小川元・竹内益雄: 土捨船による投棄土砂の分散土木学会論文集, 第161号, pp.39-49, 1969.
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SubjectTerms experiment
gravity current
turbidity
turbulent thermal
water pollution
Title EXPERIMENTAL STUDY ON THE MOTION OF TURBIDITY CLOUDS PRODUCED IN A STAGNANT WATER
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