梁艳坤2017年1月与导师隋旺华教授以共同第一作者在期刊Scientific Reports上发表了题目“An experimental investigation on the speed of sand flow through a fixed porous bed”的学术论文，该期刊是Nature出版集团旗下具有重要影响的综合性学术期刊，主要刊载自然科学、工程与材料、数理科学等方面的研究内容，该期刊领域最新排名7/63，位列JCR中Q1区，IF=4.259。
论文摘要：本文将垮落带概化为均匀多孔介质，采用室内试验研究砂颗粒通过多孔介质的流动规律。试验结果表明：砂柱高度不影响砂流速度。砂流速度随着多孔介质高度的增加呈现递减的趋势，但是当多孔介质高度达到某一临界值时，砂流速度基本不随垮落带高度的变化而变化。同时，文中提出了砂流速度与多孔介质颗粒尺寸以及砂颗粒粒径关系式：
，其中D为多孔介质的尺寸，d为砂颗粒的粒径，a和k是实验确定的系数。此外，多孔介质空间可以概化为管束模型，通过多孔介质砂流可以被认为是通过多个管道的平行流动，并给出了D与管道数量和直径（N、Dp）之间的关系。此外，进一步的研究表明是通过多孔床或多个平行管道的砂流不能简化为流过具有一定直径的一个孔。
Abstract: In this study, we document several experiments that investigate the speed of the flow of fine sand through a fixed porous bed of packed glass beads under various conditions, including the height of the sand column (H) and porous bed (h) and the diameter of the glass beads (D) and sand grains (d). The experiments are conducted with glass beads packed at a constant density and sand at a different dry bulk density. The results show that the height of the sand does not affect the speed of the sand flow. The speed of the sand flow (v) decreases with an increase inhuntilhapproaches a certain value. An equation
is proposed, whereaandkare the experimentally determined coefficients. Moreover, the flow of sand through a fixed porous bed could be regarded as parallel flow through multiple pipes, and therefore, the relationship betweenDand the number and diameter of pipes,NandDp, are discussed. Further investigations are needed for the result that the flow of sand through a porous bed or multiple parallel pipes cannot be simplified to flow through one orifice with a certain diameter.
文章链接：https://www.nature.com/articles/s41598-017-00082-2
