ZHANG Chun-sheng, LIU Zhong-bao, SHI Dong, CHENG Qi-gui, ZHANG Rong-bing, GAO Chun-ning, LI Jian-xiong. The Simulation Experiment of Surge-Type Turbidity Current Formation and Development[J]. Acta Sedimentologica Sinica, 2002, 20(1): 25-29.
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ZHANG Chun-sheng, LIU Zhong-bao, SHI Dong, CHENG Qi-gui, ZHANG Rong-bing, GAO Chun-ning, LI Jian-xiong. The Simulation Experiment of Surge-Type Turbidity Current Formation and Development[J]. Acta Sedimentologica Sinica, 2002, 20(1): 25-29.
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The Simulation Experiment of Surge-Type Turbidity Current Formation and Development
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1 Jianghan Petroleum Institute, Jingzhou Hubei 434102;
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2 Changqing Oilfield Third Extraction Factory, Yinchuan 750000
- Received Date: 2001-07-04
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Abstract
The momentum equation of underflows-type turbidity and surge-type turbidity current is compared in this paper,and the result indicates that the surge-type turbidity current entrains water not only through its upper surface but also through its front. At the slope of 0°,5°,10°, surge-type turbidity current experiments reveals that the head of the turbidity current is overhanging and is divided transversely into roughly periodic buttock-shaped lobes and clefts, on account of the mixing, the body of a turbidity current in deep water flows about 25% faster than the head, the moment process of the surge-type turbidity current shows the characteristics of wave, and back-wave transcendental front-wave. the turbidity current consumes itself in the process of mixing into the ambient medium. The flow height and velocity of surge-type turbidity current is proportional to the motion distance and under slope. Close to the bottom of the turbidity current, there is a considerable increase in density and there may even be a thin layer with bed-load flow. There is not such characteristic in the underflow-type turbidity current.
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Proportional views
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