【摘要】：Herschel-Bulkdey流體作為非牛頓流體中重要的一類,已廣泛應(yīng)用于工程領(lǐng)域。為了改善LBM對(duì)HerschelBulkley流體流動(dòng)模擬時(shí)的穩(wěn)定性和精度,在多松弛時(shí)間參數(shù)LBM(MRT LBM)的基礎(chǔ)上提出了一種改進(jìn)方法。以Poiseuille流為例,對(duì)改進(jìn)算法進(jìn)行了詳細(xì)介紹,對(duì)剪切變稀型和剪切增稠型流體分別進(jìn)行對(duì)比,并比較在不同指數(shù)情況下的相對(duì)誤差隨格子數(shù)增大的變化趨勢(shì),說(shuō)明了此改進(jìn)方法的有效性,最后通過(guò)在水泥3D打印噴頭中的應(yīng)用,與多松弛時(shí)間參數(shù)的LBM(MRT LBM)的模擬結(jié)果進(jìn)行對(duì)比,進(jìn)一步驗(yàn)證了此改進(jìn)方法的可行性。
[Abstract]:As an important class of non-Newtonian fluids, Herschel-Bulkdey fluid has been widely used in engineering fields. In order to improve the stability and accuracy of LBM in HerschelBulkley fluid flow simulation, an improved method based on multiple relaxation time parameters (LBM (MRT LBM) is proposed. Taking Poiseuille flow as an example, the improved algorithm is introduced in detail. The shear thinning type and shear thickening type fluid are compared respectively, and the relative error trends with the increase of lattice number under different exponents are compared. The effectiveness of the improved method is illustrated. Finally, the feasibility of the improved method is further verified by the comparison between the simulation results of LBM (MRT LBM) with multiple relaxation time parameters and the application in cement 3D printing nozzle.
【作者單位】： 南京工業(yè)大學(xué)機(jī)械與動(dòng)力工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(No.51635003) 國(guó)家火炬計(jì)劃產(chǎn)業(yè)化引導(dǎo)項(xiàng)目(No.2014GH040527)
【分類號(hào)】：O373
，

本文編號(hào)：2193854