نتایج جستجو برای: mesoscale modeling
تعداد نتایج: 395880 فیلتر نتایج به سال:
We present several new results on the kinetic, i.e., mesoscale, level of a continuum–kinetic–microscopic approach to multiscale modeling of complex fluids. We choose the microscopic level as Kramers’ bead-rod model for polymers, which we describe as a system of stochastic differential equations with an implicit constraint formulation. The associated Fokker-Planck equation is then derived, and a...
The Southern Ocean is riddled with mesoscale eddies. Although just a few kilometers in size, these loops and vortices are key parts of the climate system and are important in controlling how ocean circulation responds to changes in forcing. Observations reveal that changes in the intensity of these eddies vary significantly around the Southern Ocean. This contrasts with the nature of the atmosp...
1. Introduction To measure the vertical profiles of temperature and water vapor that are essential for modeling atmospheric processes, radiosondes are traditionally the privileged way to obtain upper-air information. Radiosondes, however, present certain limitations. It typically takes 40 minutes for a radiosonde to ascend through the troposphere and about 2 hours to ascend to full height. Cost...
Atomistic lattice-gas models for surface reactions can accurately describe spatial correlations and ordering in chemisorbed layers due to adspecies interactions or due to limited mobility of some adspecies. The primary challenge in such modeling is to describe spatiotemporal behavior in the physically relevant "hydrodynamic" regime of rapid diffusion of (at least some) reactant adspecies. For s...
We investigate the applicability of a mesoscale modeling approach, lattice Boltzmann simulations, to the problem of contact line motion in one and two component, two phase fluids. In this, the first of two papers, we consider liquid-gas systems. Careful implementation of the thermodynamic boundary condition allows us to fix the static contact angle in the simulations. We then consider the behav...
Mesoscale numerical modeling is an effective method of representing concrete as a three-phase material. Accurate aggregate geometry representation important aspect in mesoscale to predict mechanical properties well the damage initiation and fracture propagation. In this paper, novel approach three-dimensional (3D) scanning aggregates using structured light 3D scanner presented, parametric recon...
[1] We present the first two aircraft Global Positioning System (GPS)-reflection altimetry measurements, the most precise GPS ocean-altimetry measurement, and demonstrate the altimetric precision and spatial resolution necessary to map mesoscale eddies. Our first experiment demonstrated a 14-cm precision single-satellite ocean altimetry measurement while our more recent experiment demonstrates ...
The long-term goal of this project is to improve the high-resolution model forecasts by developing a real-time globally re-locatable capability to initialize/assimilate the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) land-surface model soil parameters. The partition of the model surface sensible and latent heat fluxes in the land-surface parameterization is sensitive to the in...
• A two-dimensional mesoscale lattice modeling approach for infill walls is proposed. Two tests were conducted aerated autoclaved concrete (AAC) infilled with and without openings. Modeling was validated the test results. Infill contact length found to depend on deformation levels. Significant wall damage in reinforced frame buildings observed past earthquakes. vast number of numerical approach...
The paper deals with the statistical inverse problem for the identification of a nonGaussian tensor-valued random field in high stochastic dimension. Such a random field can represent the parameter of a boundary value problem (BVP). The available experimental data, which correspond to observations, can be partial and limited. A general methodology and some algorithms are presented including som...
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