Lattice‐Boltzmann modeling of the air permeability of polar firn
Lattice‐Boltzmann modeling of the air permeability of polar firn
复制标题
极地firn透气性的格子-玻尔兹曼模型
DOI：
10.1029/2009jf001549
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发表时间：
2010
影响因子：
--
通讯作者：
M. Albert
中科院分区：
文献类型：
--
作者：
Z. Courville;M. Hörhold;M. Hopkins;M. Albert
雪和积雪的三维（3D）成像的最新进展，
通过复杂几何形状的流动的数值模拟极大地提高了
根据微观结构预测渗透率值。在这项工作中，我们结合了3D
从微计算机层析获得的极地积雪微结构的重建
(mCT)以及空气流的3D晶格玻尔兹曼（LB）模型。我们比较了
结果，以测量渗透性的极地积雪与广泛的范围
颗粒和孔隙尺度特征结果显示，
渗透率测量和计算的渗透率值从LB模型超过一个
广泛的样品类型。LB模型在预测实测渗透率方面更好
值比传统的经验公式极地积雪。
Recent advances in three‐dimensional (3D) imaging of snow and firn combined with
numerical modeling of flow through complex geometries have greatly improved the ability
to predict permeability values based on microstructure. In this work, we combined 3D
reconstructions of polar firn microstructure obtained from microcomputed tomography
(mCT) and a 3D lattice‐Boltzmann (LB) model of air flow. We compared the modeled
results to measurements of permeability for polar firn with a wide range
of grain and pore‐scale characteristics. The results show good agreement between
permeability measurements and calculated permeability values from the LB model over a
wide range of sample types. The LB model is better at predicting measured permeability
values than traditional empirical equations for polar firn.