丁坝绕流问题的紊流数学模型

本文应用水深平均k-e紊流模型,采用SIMPLEC计算方法,成功地模拟了丁坝绕流问题,并与相应的试验资料作了比较,计算结果表明该方法适用于模拟有回流存在的复杂水流。同时还探讨了模型中主要参数对回流长度的影响,并对其灵敏度作了分析计算,对参数作了修正,使计算所得的回流长度与实测值更吻合。

Turbulent Mathematical Model of Recirculation around Spur-dike

This paper presents a successful simulation of the recirculation around spur-dike with the adoption of a depth-average K-e turbulent model and the application of SIMPLEC numerical calculation procedure, A comparison between the numerical prediction and the test result showed that it is adequate to simulate the complicated flow patten with the existence of circulation current, The influence Of the principle parameters of the model upon circulation length is discussed and the sensitivity of parameters is numerically analysed, Then some revision is made to increase the accuracy of prediction of circulation length compared with the experimental measurement.