Rheologic properties of municipal sludge and a numerical simulation of pipe flow based on that
市政污泥流变特性及圆管流数值模拟研究

By measuring the viscosity of municipal sludge, the relationship data of the shear rate and shear stress of sludge were obtained, and the shear-thinning phenomenon was observed. The yield stress and critical shear rate were simultaneously solved by parallel sub-fitting method, and then a full range of sludge flow curve was gained. The results, which numerical simulation of pipe flow sludge through establishing a simplified model, were close to the empirical formula and experimental results of references. And we founded that diameter, flow rate and flow index have significant effects on the pipeline flow. When other conditions remain unchanged, reducing the flow diameter of 33% can lead driving pressure to increase 152.1%, and increasing the flow rate 10 times can lead driving pressure to increase 11 times, as well as increasing the flow index 10 times can lead driving pressure to decrease 20.2%.