| 基于Herschel-Bulkley流变模型的自密实混凝土流动的CFD模拟 |
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| 引用本文： | 李靖祺,徐伟.基于Herschel-Bulkley流变模型的自密实混凝土流动的CFD模拟[J].工程力学,2013(1):373-377. |
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| 作者姓名： | 李靖祺 徐伟 |
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| 作者单位： | 同济大学土木工程学院建筑工程系;西班牙瓦伦西亚理工大学高性能混凝土实验室 |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAG04B05);欧盟-中国伊拉斯姆斯联合科研项目(LISUM) |
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| 摘 要： | 为研究和预测自密实混凝土在模板中的流动性能,该文使用了一种基于Herschel-Bulkley流变模型的CFD(Computational Fluid Dynamics)模拟方法对自密实混凝土在自重作用下的浇筑过程进行二维和三维模拟并与实验室L型箱流动达到特定位置的流动时间和流动形态进行对比,分析结果表明:H-B模型用于自密实混凝土的流动模拟是可行的,与基于宾汉模型的二维模拟结果相比Herschel-Bulkley流变模型具有更高的准确度。该文最后对二维和三维模拟方法的特点和局限进行了讨论并提出建议。
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| 关 键 词： | 自密实混凝土 数值模拟 计算流体力学 赫歇尔-巴尔克莱流变模型 L型箱 |
A CFD SIMULATION OF SELF-COMPACTING CONCRETE BASED ON HERSCHEL-BULKLEY RHEOLOGICAL MODEL |
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| LI Jing-qi,XU Wei.A CFD SIMULATION OF SELF-COMPACTING CONCRETE BASED ON HERSCHEL-BULKLEY RHEOLOGICAL MODEL[J].Engineering Mechanics,2013(1):373-377. |
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| Authors: | LI Jing-qi XU Wei |
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| Affiliation: | 1(1.Department of Building Engineering,Tongji University,Shanghai 200092,China;2.Laboratory of the High-Performance Concrete,Polytechnic University of Valencia,Valencia 46020,Spain) |
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| Abstract: | In order to study and predict the flowing behavior of Self-Compacting Concrete(SCC) in the formwork,two-dimensional and three-dimensional CFD(Computational Fluid Dynamics) simulations are carried out based on H-B(Herschel-Bulkley) rheological model.The simulations are validated by L-box casting experiments of SCC on the flow time and flow pattern.The analysis result shows that the H-B rheological model is reliable to simulate the SCC flow and the simulations based on H-B rheological model exhibit more accuracy compared with the simulation based on the Bingham rheological model.Finally,characteristics and limitations of the two-dimensional and three-dimensional simulations are discussed and suggestions are proposed. |
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| Keywords: | self-compacting concrete numerical simulation CFD Herschel-Bulkley rheological model L-box |
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