Now showing items 21-40 of 177

• #### An IMEX scheme for reaction-diffusion equations: Application for a PEM fuel cell model ﻿

(Central European Journal of Mathematics, 2013-12-31)
An implicit-explicit (IMEX) method is developed for the numerical solution of reaction-diffusion equations with pure Neumann boundary conditions. The corresponding method of lines scheme with finite differences is analyzed: ...
• #### Analysis of extreme wave events on the southern coast of Brazil ﻿

(Natural Hazards and Earth System Sciences, 2014-12-31)
Using the wave model SWAN (simulating waves nearshore), high waves on the southwestern Atlantic generated by extra-tropical cyclones are simulated from 2000 to 2010, and their impact on the Rio Grande do Sul (RS) coast is ...
• #### Apparent slip mechanism between two spheres based on solvent rheology: Theory and implication for the shear thinning of non-Brownian suspensions ﻿

(Physical Review Fluids, 2018-12-10)
Analytical results for the apparent slip between two spheres in a simple biviscous model of a shear thinning fluid are presented. Velocity profiles and apparent slip lengths along the surfaces are analyzed in order to ...
• #### Arithmetic method of double-injection-electrode model for resistivity measurement through metal casing ﻿

(IEEE Transactions on Geoscience and Remote Sensing, 2010-12-31)
Through-casing resistivity (TCR) measurement instruments such as Cased Hole Formation Resistivity are extensively used for the dynamic monitoring of oil reservoirs during the production phase in oil wells to evaluate the ...
• #### Asymptotic Models for the Electric Potential across a Highly Conductive Casing ﻿

(Computers and Mathematics with Applications, 2018-07)
We analyze a configuration that involves a steel-cased borehole, where the casing that covers the borehole is considered as a highly conductive thin layer. We develop an asymptotic method for deriving reduced problems ...
• #### Automatic fitting of conical envelopes to free-form surfaces for flank CNC machining ﻿

(Computer Aided Design, 2017-10)
We propose a new algorithm to detect patches of free-form surfaces that can be well approximated by envelopes of a rotational cone under a rigid body motion. These conical envelopes are a preferable choice from the ...
• #### Automatic Red-Channel underwater image restoration ﻿

(Journal of Visual Communication and Image Representation, 2015-12-31)
Underwater images typically exhibit color distortion and low contrast as a result of the exponential decay that light suffers as it travels. Moreover, colors associated to different wavelengths have different attenuation ...
• #### BBIPED: BCAM-Baltogar Industrial Platform for Engineering Design ﻿

(18th International Conference on Circuits, Systems, Communications and Computers (CSCC 2014); Advances in Engineering Mechancis and Materials, Proc.the International Conference; on Industrial Engineering (INDE 2014)", 2014-12-31)
Currently, commercial software for computational fluid dynamics offers a good set of features to deal with traditional designs. Within a competitive market industrial innovation is a key factor that must be faced by ...
• #### A C 0 interior penalty discontinuous Galerkin Method for fourth-order total variation flow. II: Existence and uniqueness ﻿

(NMPDE:Numerical Methods For Partial Differential Equations, 2019-02-25)
We prove the existence and uniqueness of a solution of a C0 Interior Penalty Discontinuous Galerkin (C0 IPDG) method for the numerical solution of a fourth‐order total variation flow problem that has been developed in part ...
• #### A C0 interior penalty discontinuous Galerkin method for fourth‐order total variation flow I: Derivation of the method and numerical results ﻿

(NMPDE:Numerical Methods For Partial Differential Equations, 2019-02-23)
We consider the numerical solution of a fourth‐order total variation flow problem representing surface relaxation below the roughening temperature. Based on a regularization and scaling of the nonlinear fourth‐order parabolic ...
• #### Computation of slat noise sources using adaptive FEM and lighthill's analogy ﻿

(19th AIAA/CEAS Aeroacoustics Conference, 2013-12-31)
This is a summary of preliminary results from simulations with the 30P30N high-lift device. We used the General Galerkin finite element method (G2), where no explicit subgrid model is used, and where the computational mesh ...
• #### Computational cost estimates for parallel shared memory isogeometric multi-frontal solvers ﻿

(Computers and Mathematics with Applications, 2014-12-31)
• #### Discontinuous high-order finite-volume/finite-element method for inviscid compressible flows ﻿

(53rd AIAA Aerospace Sciences Meeting (2015), 2015-12-31)
The discontinuous, hybrid control-volume/finite-element method merges the desirable conservative properties and intuitive physical formulation of the finite-volume technique, with the capability of local arbitrary high-order ...
• #### Discrete maximum principles for nonlinear parabolic PDE systems ﻿

(IMA Journal of Numerical Analysis, 2012-12-31)
Discrete maximum principles (DMPs) are established for finite element approximations of systems of nonlinear parabolic partial differential equations with mixed boundary and interface conditions. The results are based on ...