Towards Lattice-Boltzmann modelling of unconfined gas mixing in anaerobic digestion

Towards Lattice-Boltzmann modelling of unconfined gas mixing in anaerobic digestion
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厌氧消化中无侧限气体混合的格子-玻尔兹曼模型

DOI:
10.1016/j.compfluid.2018.12.008
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发表时间:
2019
期刊:
影响因子:
2.8
通讯作者:
Dapelo D
Dapelo D
中科院分区:
工程技术3区
文献类型:
--
作者:
Dapelo D

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开发并描述了一种模拟厌氧消化中气体混合的新型格子-玻尔兹曼模型。欧拉-拉格朗日多相、非牛顿和湍流模型首次与新颖的混合边界条件一起应用。该模型在实验室规模的框架中进行了验证,并通过粒子成像测速 (PIV) 和创新的正电子发射粒子跟踪 (PEPT) 来评估流动模式。该模型在定性和定量方面均保真度地再现了实验流型。该模型开辟了厌氧消化池中复杂多相流的计算建模的新方法,并且与类似的欧拉-拉格朗日有限体积计算流体动力学方法相比,具有计算效率等特定优势。
A novel Lattice-Boltzmann model to simulate gas mixing in anaerobic digestion is developed and described. For the first time, Euler–Lagrange multiphase, non-Newtonian and turbulence modelling are applied jontly with a novel hybrid boundary condition. The model is validated in a laboratory-scale framework and flow patterns are assessed through Particle Imaging Velocimetry (PIV) and innovative Positron-Emission Particle Tracking (PEPT). The model is shown to reproduce the experimental flow patterns with fidelity in both qualitative and quantitative terms.The model opens up a new approach to computational modelling of the complex multiphase flow in anaerobic digesters and offers specific advantages, such as computational efficiency, over an analogous Euler-Lagrange finite-volume computational fluid dynamics approach.
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正电子发射粒子跟踪 (PEPT):实验室规模厌氧消化池中流动可视化的一种新方法
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