泥沙漿體屈服應力與坍落度及坍流度關係之研究

本研究以純剪力流理論來分析塑性流體的坍流特性，以Roussel and Coussot（2005）的單層理論及Pierre et al.（2013）的雙層理論為基礎，將他們平截圓柱試驗桶坍流理論擴展至平截圓錐試驗桶坍流理論，並將結果均以無因次方式表達，使其適用於不同大小及形狀之平截圓錐試驗桶的坍流試驗。理論分析結果顯示在無因次屈服應力小於0.15時，單層及雙層理論的結果趨於相同。理論分析與泥沙漿體的坍流試驗結果進行比較，泥沙漿體具有高坍流性，其坍流特性與理論分析結果大致相同。

關鍵字

泥石漿體；坍流試驗；坍落度；坍流度；屈服應力

並列摘要

This study analyzed the slump flow of a plastic fluid from the perspective of pure shear-flow theory by using the single- and double-layer models, respectively. A generalized theory for slump flow testing using a truncated cone was developed, overcoming the limitations of using cylindrical frustums. The theoretical results are presented in dimensionless form so that tests can be performed using different sizes of truncated cone. The results obtained using the single- and double-layer models were the same when the dimensionless yield stress was less than 0.15. We also compared the theoretical results with experiments of sediment slurries. Sediment slurries had high slump flow, and their slump flow characteristics were consistent with the theoretical results.

並列關鍵字

Sediment Slurry ； Slump Flow Test ； Slump ； Slump Flow ； Yield Stress

參考文獻

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