热污染的三维椭圆型数值模拟<sup>*</sup>

李嘉; 赵文谦; 罗麟

热污染的三维椭圆型数值模拟^*

成都科技大学高速水流国家重点实验室

基金项目: *国家教委博士点基金资助课题

计量
- 文章访问数: 1828
- HTML全文浏览量: 59
- PDF下载量: 510
- 被引次数: 0
出版历程
- 收稿日期: 1991-09-20
- 刊出日期: 1992-10-15

A Fully Elliptic Calculating Procedure for Three Dimensional Thermal Pollution

Chengdu University of Science and Technology, Chengdu

摘要

摘要: 过去对复杂流动的三维数值模拟往往要采用许多简化处理方法,使得数值模型的适用性受到很大限制,所得结果也不能全面反应流场的特征.本文用有限容积法直接求解三维椭圆型流动控制方程,紊流模型采用有浮力修正的κ-ε模型.本文首先将该模型用于有横流情况下岸边等密度排放问题,以检验本数值模型和计算程序的正确性,所得结果正确预报了排放口下游的回流区,与文献[7]的计算和实验结果一致.然后进一步将其应用于有横流情况下的温排水、取水问题,所得结果合理,并精细地揭示了流场的内部特征.
- 紊流 /
- 热污染 /
- 椭圆型 /
- 三维数值模型
Abstract: The use of the mathematical models so far for three-dimensional flow has some limitations because of their simplifications.Many characteristics of the flow field can not be predicted by these models.In this paper the three dimensional elliptic governing equations are solved by finite-volume methods;the buoyancy extensions of the widely tested k-ε.model is adapted.The method is first applied to calculate the field of side discharge into open channel flow.The results are in good agreement with those of ref.[7].Then it is further used to the intake discharge problem which is of a typical layout in cooling-water projects,and the calculated results,which predict in detail the charactreistics of flow field,are reasonable.
- turbulence /
- thermal pollution /
- elliptic /
- three-dimensional numerical model

HTML全文

参考文献(11)

[1]	Motz,L.H.and B.A.Benedict,Surface jet model for heated discharges,J.Hydraulics Div.,ASCE,98,HY1,Proc.Paper 8669,Jan.(1972).
[2]	Holley,E.R.,Siemons and G.Abraham,Some aspects of analysing transverse diffusion in river,J.Hydraulic Research,10,1(1972).
[3]	倪浩清等,紊流数学模型在环境预测中的研究和展望,水利学报 (1986).
[4]	Patankar,S.V.and D.B.Spalding,A calculation procedure for heat,mass and momentum in 3-D parabolic flows,int.J.Heat Mass Transfer,15(1972).
[5]	Pratap,V.S.and D.B.Spalding,Fluid flow and heat transfer in 3-D duct flows,Int.J.Heat Mass Transfer,19(1976).
[6]	Rodi,W.and S.K.Srivata,A locally ellipic calculating procedure for 3-D fiows and its application to a jet in cross-flow,Computer Method in Applied Mechanics and Engineering,23 (1980),67-83.
[7]	Demuren,A.O.and W.Rodi,Side discharges into open channels:mathematical model,J.of Hydraulic Engineering,109,12(1983).
[8]	Patankar,S.V.et al.,Prediction of the 3-D velocity field of a deflected turbulent jet,J.of Fluids Engineering,Trans.ASCE,99(1977).
[9]	Launder,B.E.and D.B.Spalding,The numerical computation of turbulent flow,Computer Methods in Applied Mechanics and Engineering,3 (1974).
[10]	Hossain,M.S.,Mathematische modellierung von Turbulenten auftriebasstromungen,Ph.D.Thesis,University of Karlsruhe (1979).
[11]	陈惠泉,陈燕茹,重叠式排取水口的研究与实践,《中科院、水电部水利水电科学研究院科学研究论文集》,17 (1984).