Viscosity of the upper mantle from laboratory creep and anelasticity measurements in peridotite at high pressure and temperature     

Hiroki Sato 《Geophysical Journal International》1991,105(3):587-599

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浅海流体动力学一种含变湍粘性系数的流速分解模型(Ⅱ)——模型在超浅海风暴潮零阶问题中的应用     

宋丽娜 《中国海洋大学学报(自然科学版)》1987,(2)

本文将流速分解模型应用于作为超浅海风暴潮的渤海风潮,并讨论了变湍粘性系数的确定。作为一个初步的,但较为成功的数值试验例子,描述了实际风场作用下的渤海风潮,比较了变湍粘性系数模型与常湍粘性系数模型的计算结果间的差异。  相似文献   

湍流数值模拟中封闭模式应用的局限性   总被引：1，自引：0，他引：1  

蔡树群  王文质 《海洋工程》2001,19(1):84-87

通过对琼州海峡的潮流场特征进行数值模拟，指出了选择不同的特征混合长度表达式对数值模拟结果的影响，表明了基于特征混合长度理论的流封闭模式在近海湍流数值模拟中应用的局限性。  相似文献   

Effects of scattering and resonance on energy dissipation of an internal tide in a narrow shelf     

Yuji Kawamura  Yujiro Kitade 《Journal of Oceanography》2007,63(1):15-25

The effects of scattering and resonance on the energy dissipation of an internal tide were investigated using a two-dimensional model which is a reassembled version of the theoretical generation model devised by Rattray et al. (1969) for internal tide. The basic character of the scattering process at the step bottom was first investigated with a wide shelf model. When the internal wave incited from a deep region (Region II) into the shallow shelf region (Region I), a passing wave into the shallow region, a reflected wave into the deep region, and a beam-like wave, i.e. a scattered wave (SW), emanated at the step bottom. The SW, which consists of the superposition of numerous internal modes, propagated upward/downward into both regions. The general properties of the SW were well expressed around the shelf edge, even in the present model with viscosity effect. The amplitude of the SW decreased dramatically when the depth of the velocity maximum of the incident internal wave in Region II corresponded with the depth of the shelf edge. In the narrow shelf model, where the decay distance of the internal wave in Region I is longer than the shelf width, the incident internal wave reflected at the coast to form a standing wave. When the internal wave in Region I is enhanced by the resonance, the energy of the SW in Region II is also intensified. Furthermore, the energy of the modes in Region II predominated when the velocity maximum is identical to that of the dominant mode in Region I. These results suggest that the spatial scale of shelf region is a very important factor governing the energy dissipation of the internal tide through reflection and scattering in a narrow shelf.  相似文献   

Large eddy simulation of hydrocyclone—prediction of air-core diameter and shape     

M. Narasimha  Mathew Brennan  P.N. Holtham 《International Journal of Mineral Processing》2006

Hydrocyclones are widely used in the mining and chemical industries. An attempt has been made in this study, to develop a CFD (computational fluid dynamics) model, which is capable of predicting the flow patterns inside the hydrocyclone, including accurate prediction of flow split as well as the size of the air-core. The flow velocities and air-core diameters are predicted by DRSM (differential Reynolds stress model) and LES (large eddy simulations) models were compared to experimental results. The predicted water splits and air-core diameter with LES and RSM turbulence models along with VOF (volume of fluid) model for the air phase, through the outlets for various inlet pressures were also analyzed. The LES turbulence model led to an improved turbulence field prediction and thereby to more accurate prediction of pressure and velocity fields. This improvement was distinctive for the axial profile of pressure, indicating that air-core development is principally a transport effect rather than a pressure effect.  相似文献   

Effects of mode coupling and location of rotational axis on glacial induced rotational deformation in a laterally heterogeneous viscoelastic earth     

Patrick Wu  Hansheng Wang 《Geophysical Journal International》2006,167(2):853-859

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Inversion for rheological parameters from post-seismic surface deformation associated with the 1960 Valdivia earthquake, Chile   总被引：3，自引：0，他引：3  

Francisco Lorenzo-Martín  Frank Roth  Rongjiang Wang 《Geophysical Journal International》2006,164(1):75-87

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Evolution of orogenic wedges and continental plateaux: insights from crustal thermal–mechanical models overlying subducting mantle lithosphere     

O. Vanderhaeghe  S. Medvedev  P. Fullsack  C. Beaumont  R. A. Jamieson 《Geophysical Journal International》2003,153(1):27-51

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从流体包裹体研究探讨金属矿床成矿条件   总被引：29，自引：4，他引：29  

芮宗瑶  李荫清  王龙生  王义天 《矿床地质》2003,22(1):13-23

根据作者多年来对流体包裹体的研究成果，参考了国内外的研究结论，提出了一个新的成矿流体分类方案，并评述了我国若干典型金属矿床的研究状况，由此探讨了金属矿床的形成机制。  相似文献   

APPLICATION OF SOME MECHANICAL CONCEPTS TO STRUCTURAL GEOLOGY     

WUHongling WANGWei 《大地构造与成矿学(英文版)》2003,27(1):120-129

This paper discusses some mechanical concepts that have been largely applied to structural geology and tectonics, and addresses the problems and misunderstandings in use of these mechanical terms. The purpose is to stimulate the interests for structural geologists in using the mechanical principles and methods correctly to solve the geodynamic problems.  相似文献