| Computing
Depth-averaged Flows Using Boundary-fitted Coordinates and Staggered Grids |
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| 作者姓名： | 洪益平 周雪漪 陈永灿 余常昭 |
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| 作者单位： | HONG Yiping，ZHOU Xueyi CHEN Yongcan，YU Changzhao Department of Hydraulic and Hydropower Engineering，Tsinghua University，Beijing 100084，China |
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| 摘 要： | Introduction Foropenchannelflow,thedepth-averagednonlineark-εmodelisvalidwhenthewidth-to-depthratioislargeandtheverticalvariationofthemean-flowquantitiesisnotsignificant.Fornaturalirregularboundaries,acoarsegriddistributionresultsin‘stairstepped’or‘blockedoff’approximationswhichmayresultinpoorresolution.Theboundary-fittedcoordinatestechniqueisusedtoovercomethesedeficiencies.Withboundary-fittedcoordinates,thecollocatedgridsystemisoftenusedtosimplifytheprogrammingbutthismaycreatea‘check…
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| 关 键 词： | depth-averaged k-ε model boundary-fitted coordinates staggered grid meandering channel |
Computing Depth-averaged Flows Using Boundary-fitted Coordinates and Staggered Grids |
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| HONG Yiping,ZHOU Xueyi,CHEN Yongcan,YU Changzhao.Computing
Depth-averaged Flows Using Boundary-fitted Coordinates and Staggered Grids[J].Tsinghua Science and Technology,2000,5(2):226-230. |
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| Authors: | HONG Yiping ZHOU Xueyi CHEN Yongcan YU Changzhao |
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| Abstract: | A depth-averaged nonlinear k-ε model for turbulent flows in complex geometries has been developed in a boundary-fitted coordinate system. The SIMPLEC procedure is used to develop an economical discrete method for staggered grids to analyze flows in a 90° bend. This paper describes how to change a program in rectangular coordinate into a boundary-fitted coordinate. The results compare well with experimental data for flow in a meandering channel showing the efficiency of the model and the discrete method. |
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| Keywords: | depth-averaged boundary-fitted coordinates staggered grid meandering channel |
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