The lattice Boltzmann method and Herschel-Bulkley model were combined to establish a three-dimensional simulation model of V-funnel test for fresh concrete. The variation of the flow field in V-funnel test was explored, and the method of evaluating the filling ability of concrete was optimized. The experimental results showed that the accuracy of numerical simulation of V-funnel test was high, whose error was less than 6%. Based on the V-funnel test model, the effects of rheological parameters on the test process and results were discussed and analyzed. The results demonstrated that the increase of rheological parameters prolonged the discharge time. The average velocity u_V at the termination of V-funnel test was proposed as an indicator to quantitatively evaluate the filling ability, and a new method was established to qualitatively determine the shear-thickening/thinning characteristics of fresh concrete during the V-funnel test.

将格子Boltzmann方法和Herschel-Bulkley模型相结合，建立了新拌混凝土V型漏斗试验三维模拟模型。探讨了V型漏斗试验中流场的变化规律，优化了混凝土充填能力的评价方法。实验结果表明，V型漏斗试验的数值模拟精度较高，误差小于6%。基于V型漏斗试验模型，讨论和分析了流变参数对试验过程和结果的影响。结果表明，流变参数的增加延长了放电时间。平均速度u _V提出了在V型漏斗试验结束时作为定量评价填充能力的指标，并建立了一种新的方法来定性确定V型漏斗试验过程中新拌混凝土的剪切增稠/稀化特性。