搜索结果: 61-75 共查到“知识库 地球流体力学”相关记录129条 . 查询时间(3.812 秒)
流动单元是玄武岩地层的最基本组成单元,其内部分带性控制储层的储集性能和有效储层的分布位置.运用钻井岩心资料建立了玄武岩流动单元分带地质模式,单个流动单元由上而下依次为上部气孔带、中部致密带和下部气孔带.依据自然伽马(GR)、声波时差(DT)、补偿密度(RHOB)、深侧向电阻率(LLD)和中子孔隙度(NPHI)分析流动单元测井响应特征,判别蚀变带、气孔带和致密带3种测井相类型;自然伽马能谱(K、Th...
We present a numerical study of the generation and evolution of a mixed layer in a stably stratified layer of Boussinesq fluid. We use an external forcing in the equation of motion to model the experi...
Anomalous diffusion in geophysical and laboratory turbulence
Anomalous diffusion in geophysical laboratory turbulence
2009/11/16
We present an overview and some new results on anomalous diffusion of passive scalar in turbulent flows (including those used by Richardson in his famous paper in 1926). The obtained results are based...
On the influence of a large scale coherent vortex on the turbulent cascade
large scale coherent vortex turbulent cascade
2009/11/16
We investigate the flow between coaxial rotating disks in the situation where a strong axial vortex is present over a turbulent background. This is nonstationary and inhomogeneous as is common in most...
Geophysical turbulence data and turbulence theory
Geophysical turbulence data turbulence theory
2009/11/16
Many vital insights into the nature of turbulence in fluids have originated from experimental data obtained in geophysical flows. Geophysical data have often helped to stimulate the creation of new tu...
Spectral evolution of two-layer weak geostrophic turbulence.Part I:Typical scenarios
Spectral evolution two-layer weak geostrophic turbulence Typical scenarios
2009/11/16
Long-time evolution of large-scale geophysical flows is considered in a β-plane approximation. Motions in an infinite 2-layer model ocean are treated as a system of weakly nonlinear Rossby waves (weak...
Diffusion model of interacting gravity waves on the surface of deep fluid
Diffusion model interacting gravity waves surface of deep fluid
2009/11/13
A simple phenomenological model for nonlinear interactions of gravity waves on the surface of deep water is developed. The Snl nonlinear interaction term in the kinetic equation for wave action is rep...
Fractional Fourier approximations for potential gravity waves on deep water
Fractional Fourier approximations potential gravity waves deep water
2009/11/12
In the framework of the canonical model of hydrodynamics, where fluid is assumed to be ideal and incompressible, waves are potential, two-dimensional, and symmetric, the authors have recently reported...
A mechanistic modelling and data assimilation approach to estimate the carbon/chlorophyll and carbon/nitrogen ratios in a coupled hydrodynamical-biological model
mechanistic modelling data assimilation approach carbon/chlorophyll and carbon/nitrogen ratios
2009/11/11
The principal objective of hydrodynamical-biological models is to provide estimates of the main carbon fluxes such as total and export oceanic production. These models are nitrogen based, that is to s...
A continuum theory is developed for a geophysical fluid consisting of two species. Balance laws are given for the individual components of the mixture, modeled as micropolar viscous fluids. The contin...
Streamflow dynamics at the Puget Sound,Washington:application of a surrogate data method
Streamflow dynamics Puget Sound surrogate data method
2009/11/9
Recent progress in nonlinear dynamic theory has inspired hydrologists to apply innovative nonlinear time series techniques to the analysis of streamflow data. However, regardless of the method employe...
Nonlinear dynamics of turbulent waves in fluids and plasmas
Nonlinear dynamics turbulent waves fluids plasmas
2009/11/9
In a model drift wave system that is interesting both in fluids and plasmas, we find that an embedded moving saddle point plays an important role at the onset of turbulence. Here the saddle point is a...
Penetrative convection in stratified fluids:velocity and temperature measurements
Penetrative convection stratified fluids velocity and temperature measurements
2009/11/9
The flux through the interface between a mixing layer and a stable layer plays a fundamental role in characterizing and forecasting the quality of water in stratified lakes and in the oceans, and the ...
A theoretical model of a wake of a body towed in a stratified fluid at large Reynolds and Froude numbers
theoretical model stratified fluid large Reynolds Froude numbers
2009/11/9
The objective of the present paper is to develop a theoretical model describing the evolution of a turbulent wake behind a towed sphere in a stably stratified fluid at large Froude and Reynolds number...
On statistical equilibrium in helical fluid flows
statistical equilibrium helical fluid flows
2009/11/9
The statistical mechanics of 3-D helical flows is re-examined for a continuum truncated at a top wavenumber. Based on the principle of equipartition of the flow enstrophy between helical modes, the em...