發(fā)布時(shí)間：2018-03-03 09:28

  本文選題：離散單元法　切入點(diǎn)：計(jì)算流體動(dòng)力學(xué)　出處：《計(jì)算力學(xué)學(xué)報(bào)》2016年05期 　論文類型：期刊論文

【摘要】：基于考察泥沙運(yùn)動(dòng)的細(xì)觀行為特征,采用離散單元法(DEM)模擬泥沙顆粒運(yùn)動(dòng),結(jié)合帶自由表面的水動(dòng)力學(xué)計(jì)算模型,建立了CFD-DEM耦合數(shù)值模型。計(jì)算程序開發(fā)基于Fortran語言來實(shí)現(xiàn)。耦合模型中實(shí)現(xiàn)了硬球模型和軟球模型兩種顆粒碰撞模型,應(yīng)用范圍較廣。作為自由表面水流與泥沙顆粒流數(shù)值模型的初步研究,在模型建立的基礎(chǔ)上,對(duì)模型做了基本的驗(yàn)證。分別通過單顆粒靜水沉降和混合顆粒群分選兩個(gè)計(jì)算工況,驗(yàn)證了模型的正確性及模擬精度。該耦合模型可進(jìn)一步豐富帶自由表面水流條件下泥沙運(yùn)動(dòng)的研究手段。
[Abstract]:Based on the characteristics of microscopic behavior of sediment movement, the discrete element method (DEM) is used to simulate the sediment particle movement, and the hydrodynamic model with free surface is used to calculate the sediment particle movement. The CFD-DEM coupling numerical model is established, and the calculation program is developed based on Fortran language. In the coupling model, two kinds of particle collision models are realized: the hard sphere model and the soft sphere model. As a preliminary study of the numerical model of free surface flow and sediment particle flow, based on the establishment of the model, The model is verified by two calculation conditions, one is static water settlement of single particle and the other is separation of mixed particles. The coupling model can further enrich the research methods of sediment movement under the condition of free surface flow.
【作者單位】： 上海交通大學(xué)船舶海洋與建筑工程學(xué)院;河口海岸交通行業(yè)重點(diǎn)實(shí)驗(yàn)室;上海交通大學(xué)水動(dòng)力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(11572196;BC0100133) 國家973計(jì)劃(2014CB046200) 水利部公益性行業(yè)科研專項(xiàng)經(jīng)費(fèi)(201401027) 河口海岸交通行業(yè)重點(diǎn)實(shí)驗(yàn)室開放課題(KLECE201303)資助項(xiàng)目
【分類號(hào)】：O352

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本文編號(hào)：1560458