10,565 research outputs found
PRELIMINARY RESULTS OF LARGE EDDY SIMULATIONS OF A HYDROCYCLONE
Subgrid-scale modeling, which characterizes Large Eddy Simulation (LES), has been used
to predict the behavior of a water-fed hydrocyclone operating without an air core. The
governing equations were solved by a fractional step method on a staggered grid. The
Smagorinsky subgrid-scale model was employed to account for turbulent effects. Numerical
results actually capture the main features of the flow pattern and agree reasonably well
with experiments, suggesting that LES represents an interesting alternative to classical
turbulence models when applied to the numerical solution of fluid flows within
hydrocyclones
Uso de coletores com substrato artificial para monitoramento biológico de qualidade de água.
bitstream/CNPMA/7463/1/comunicado_39.pd
The CDM growth rate of structure revisited
We re-examine the growth index of the concordance cosmology in the
light of the latest 6dF and {\em WiggleZ} data. In particular, we investigate
five different models for the growth index , by comparing their
cosmological evolution using observational data of the growth rate of structure
formation at different redshifts. Performing a joint likelihood analysis of the
recent supernovae type Ia data, the Cosmic Microwave Background shift
parameter, Baryonic Acoustic Oscillations and the growth rate data, we
determine the free parameters of the parametrizations and we
statistically quantify their ability to represent the observations. We find
that the addition of the 6dF and {\em WiggleZ} growth data in the likelihood
analysis improves significantly the statistical results. As an example,
considering a constant growth index we find and
.Comment: 8 pages, 5 figures, Accepted for publication by International J. of
Modern Physics D (IJMPD). arXiv admin note: substantial text overlap with
arXiv:1203.672
Colheita de girassol com plataforma de milho adaptada.
Adaptações feitas na plataforma de milho; Funcionamento da plataforma de milho adaptada; Vantagens da plataforma de milho adaptada; Indicações técnicas para a colheita de girassol.bitstream/item/60603/1/Folder-06-2005.pdf1 folder
- …