| 超声波作用下污泥水分扩散过程的数值模拟 |
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| 引用本文： | 赵芳,陈振乾,施明恒.超声波作用下污泥水分扩散过程的数值模拟[J].工程热物理学报,2011(4):659-662. |
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| 作者姓名： | 赵芳 陈振乾 施明恒 |
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| 作者单位： | 东南大学能源与环境学院; |
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| 基金项目： | 高校博士点基金资助项目(No.20090092110005) |
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| 摘 要： | 建立了超声波作用下污泥内部水分扩散模型,利用分形理论对超声波(20 kHz)作用下污泥内部孔隙结构进行描述,探讨了超声波声能密度对污泥孔隙表面分形维数df及孔隙通道曲折度分形维数dw的影响,在此基础上建立了超声波作用下多孔介质中液体有效扩散系数的分形模型,对不同声能密度超声波辐照下污泥水分扩散过程进行了数值模拟.研究发...
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| 关 键 词： | 超声波 污泥 分形 孔隙 扩散 |
Numerical Simulation on Mositure Diffusion Processo of Sludge Under the Effect of Ultrasound |
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| ZHAO Fang CHEN Zhen-Qian SHI Ming-Heng.Numerical Simulation on Mositure Diffusion Processo of Sludge Under the Effect of Ultrasound[J].Journal of Engineering Thermophysics,2011(4):659-662. |
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| Authors: | ZHAO Fang CHEN Zhen-Qian SHI Ming-Heng |
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| Institution: | ZHAO Fang CHEN Zhen-Qian SHI Ming-Heng (School of Energy and Environment,Southeast University,Nanjing 210096,China) |
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| Abstract: | A diffusion model for moisture transfer in sludge under the effect of ultrasound was established,the pore size distribution in sludge with ultrasonic irradiation(20 kHz) was described by fractal theory.The effects of ultrasonic energy density on pore surface fractal dimension d_f and tortuosity fractal dimension d_w were analyzed.Based on the fractal characterization,the fractal model of effective moisture diffusion coefficient in porous media was developed,and the moisture diffusion processes in sludge und... |
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| Keywords: | ultrasound sludge fractal pore diffusion |
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