Abstract The present study considered the application of a multiphase model with Eulerian approach for the solids phase in dilute-phase conveying, where the results are compared against previously published experimental results based on 42 μm nominal diameter glass particles. In particular, the Favre-Averaged Drag turbulent dispersion model is studied where it is found to have greater effects on the particle concentration distribution as compared to the gas phase velocity. While certain discrepancies are observed between simulations and published experimental data, the flow characteristics are adequately captured after addressing the underlying cause of inaccuracies. Inaccuracies in the particle concentration distributions along a vertical pipe section result from the difficulty in capturing the transitional zone where the particle rope starts to disperse. On the other hand, particle diameter variations underpin the mismatches along a horizontal pipe section. Interestingly, increasing the particle diameter leads to the successful capturing of the particle concentration distribution along the horizontal pipe section. The accuracy of employing an Eulerian approach for solids phase is demonstrated, provided that effects due to the particle diameter are accounted for.

中文翻译：

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欧拉颗粒模型在稀相气力输送中的应用

摘要 本研究考虑了多相模型与欧拉方法在稀相输送中固相的应用，将结果与先前公布的基于 42 μm 标称直径玻璃颗粒的实验结果进行比较。特别是，研究了 Favre-Averaged Drag 湍流分散模型，发现与气相速度相比，它对颗粒浓度分布有更大的影响。虽然在模拟和公布的实验数据之间观察到了某些差异，但在解决了不准确的根本原因后，可以充分捕捉到流动特性。沿垂直管段的颗粒浓度分布不准确是由于难以捕获颗粒绳开始分散的过渡区。另一方面，颗粒直径的变化支持了沿水平管段的不匹配。有趣的是，增加颗粒直径可以成功捕获沿水平管段的颗粒浓度分布。证明了对固相采用欧拉方法的准确性，前提是考虑到颗粒直径的影响。增加颗粒直径导致成功捕获沿水平管段的颗粒浓度分布。证明了对固相采用欧拉方法的准确性，前提是考虑到颗粒直径的影响。增加颗粒直径导致成功捕获沿水平管段的颗粒浓度分布。证明了对固相采用欧拉方法的准确性，前提是考虑到颗粒直径的影响。