Estimation of solid concentration in solid-liquid two-phase flow in horizontal pipeline using inverse-problem approach

• 作者: Ji Zhang Han Yuan Ning Mei Zhe Yan
• 来源期刊: 颗粒学报（英文版）
• 年，卷（期）: 2022,（3）
• 页码范围: 1-13
• 页数: 13页
• 语种: 英文

摘要

In this study,an inverse-problem method was applied to estimate the solid concentration in a solid-liquid two-phase flow.An algebraic slip mixture model was introduced to solve the forward problem of solid-liquid convective heat transfer.The time-average conservation equations of mass,momentum,energy,as well as the volume fraction equation were computed in a computational fluid dynamics(CFD) simulation.The solid concentration in the CFD model was controlled using an external program that included the inversion iteration,and an optimal estimation was performed via experimental mea-surements.Experiments using a fly-ash-water mixture and sand-water mixture with different solid concentrations in a horizontal pipeline were conducted to verify the accuracy of the inverse-problem method.The estimated results were rectified using a method based on the relationship between the estimated results and estimation error;consequently,the accuracy of the corrected inversion results improved significantly.After a verification through experiments,the inverse-problem method was con-cluded to be feasible for predicting the solid concentration,as the estimation error of the corrected results was within 7％ for all experimental samples for a solid concentration of less than 50％.The inverse-problem method is expected to provide accurate predictions of the solid concentration in solid-liquid two-phase flow systems.