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Clinical study on the effect of abdominal cavity chemotherapy by hot perfusion and sustained low losmatic pressure on malignant ascites caused by gastrointestinal tumors
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作者 杨光 刘长安 《中国组织工程研究与临床康复》 CAS CSCD 2001年第18期152-,共2页
关键词 Clinical study on the effect of abdominal cavity chemotherapy by hot perfusion and sustained low losmatic pressure on malignant ascites caused by gastrointestinal tumors
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Numerical Study on Plume Interaction Above An AlternatingDiffuser in Stagnant Water 被引量:1
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作者 匡翠萍 李行伟 +1 位作者 刘曙光 顾杰 《China Ocean Engineering》 SCIE EI 2006年第2期289-302,共14页
The plume interaction above an alternating diffuser in stagnant water is studied with 3D Reynolds-averaged NavierStokes equations (RANS) combined with a buoyancy-extended κ-ε model. The steady three-dimensional tu... The plume interaction above an alternating diffuser in stagnant water is studied with 3D Reynolds-averaged NavierStokes equations (RANS) combined with a buoyancy-extended κ-ε model. The steady three-dimensional turbulent flow and temperature fields are computed by use of the finite volume method on a non-uniform high resolution orthogonal grid. The numerical predictions demonstrate a generic flow pattern for different turbulent heated jet discharges: the buoyant jets on each side of the diffuser first merge to form an essentially two-dimensional plume which bends back toward the diffuser centerline due to a low pressure cavity. In general, an under-pressure exists in the cavity until the plumes merge; the pressure increases to slightly positive afterwards. Two-dimensionality of the scalar and flow field is attained much later than the point of zero pressure. The position of merging point is governed by mainly four parameters - the discharge densimetfic Froude number, the port diameter and space, and the horizontal distance between alternating jet nozzles. A formula from numerical simulations is obtained through regression analysis and it is used to predict the position of plume merging point. The predicted temperature fields are comparable to previous experiments. 展开更多
关键词 alternating diffuser merging point plume interaction low pressure cavity ednsimetric Froude number turbulence modelling computational fluid dynamics κ-ε model enviromental hydraulics
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