Computational Mathematics (CM): Envíos recientes
Now showing items 2140 of 245

Influence of boreholeeccentred tools on wireline and loggingwhiledrilling sonic logging measurements
(201306)We describe a numerical study to quantify the influence of tooleccentricity on wireline and loggingwhiledrilling (LWD) sonic logging measurements. Simulations are performed with a hpadaptive Fourier FiniteElement ... 
New post processing method for interpretation of through casing resistivity (TCR) measurements
(201103)We propose a new iterative method for post processing through casing resistivity (TCR) measurements. This method can be seen as a correction or extension of Kaufman´s theory to more complex scenarios, in which the casing ... 
Sensitivity Analysis for the Appraisal of Hydrofractures in Horizontal Wells with Borehole Resistivity Measurements
(201306)This paper numerically evaluates the possibility of using borehole electromagnetic (EM) measurements to diagnose and quantify hydraulic fractures that have been arti ficially generated in a horizontal well. Hydrofractures ... 
A Simulation Method for the Computation of the E
(202103)We propose a set of numerical methods for the computation of the frequencydependent eff ective primary wave velocity of heterogeneous rocks. We assume the rocks' internal microstructure is given by microcomputed tomography ... 
Goaloriented adaptivity for a conforming residual minimization method in a dual discontinuous Galerkin norm
(202103)We propose a goaloriented meshadaptive algorithm for a finite element method stabilized via residual minimization on dual discontinuousGalerkin norms. By solving a saddlepoint problem, this residual minimization delivers ... 
A conservative lubrication dynamics method for the simulation of dense noncolloidal suspensions with particle spin
(20210215)In this paper, a novel Fast Lubrication Dynamics method that can efficiently simulate dense noncolloidal suspensions is proposed. To reduce the computational cost in the presented methodology, interparticle lubricationbased ... 
Rational approximation of Pwave kinematics — Part 2: Orhorhombic media
(202009)Orthorhombic anisotropy is a modern standard for 3D seismic studies in complex geologic settings. Several seismic data processing methods and wave propagation modeling algorithms in orthorhombic media rely on phasevelocity, ... 
A new acoustic assumption for orthorhombic media
(202011)In exploration seismology, the acquisition, processing and inversion of Pwave data is a routine. However, in orthorhombic anisotropic media, the governing equations that describe the Pwave propagation are coupled with ... 
Equivalence between the DPG method and the Exponential Integrators for linear parabolic problems
(202011)The Discontinuous PetrovGalerkin (DPG) method and the exponential integrators are two well established numerical methods for solving Partial Di fferential Equations (PDEs) and sti ff systems of Ordinary Di fferential ... 
A DPGbased timemarching scheme for linear hyperbolic problems
(202011)The Discontinuous PetrovGalerkin (DPG) method is a widely employed discretization method for Partial Di fferential Equations (PDEs). In a recent work, we applied the DPG method with optimal test functions for the time ... 
Rational approximation of Pwave kinematics — Part 1: Transversely isotropic media
(202009)In seismic data processing and several wave propagation modeling algorithms, the phase velocity, group velocity, and traveltime equations are essential. To have these equations in explicit form, or to reduce algebraic ... 
Molecular Dynamics Test of the StressThermal Rule in Polyethylene and Polystyrene Entangled Melts
(20200203)Anisotropic thermal transport induced by deformation and the linear relation between the thermal conductivity and stress tensors, also known as the stressthermal rule (STR), are tested via molecular dynamics simulations ... 
Numerical investigation of the rheological behavior of a dense particle suspension in a biviscous matrix using a lubrication dynamics method
(20200519)This paper presents a numerical approach to predict the rheology of dense noncolloidal suspensions with a biviscous matrix. A biviscous matrix is characterized as a fluid with two shear rate dependent viscosities i.e. one ... 
Finite Element simulations: computations and applications to aerodynamics and biomedicine
(20201211)Partial Differential Equations describe a large number of phenomena of practical interest and their solution usually requires running huge simulations on supercomputing clusters. Especially when dealing with turbulent ... 
Sensitivity and Uncertainty Analysis by Discontinuous Galerkin of Lockin Thermography for Crack Characterization
(202009)This work focuses on the characterization of narrow vertical cracks of nite size using optically excited lockin thermography (OLT). To characterize these cracks, we need to solve an illposed inverse problem. As a previous ... 
Definition of tailor made cutting tools for machining of complex surfaces based on final surface shape
(2020)In this work a design methodology to define the best geometry of cutting tool for complex surfaces is defined, being based on the final part surface geometry. The manufacture of components with tailor made shaped tools, ... 
The Construction of Conformingtoshape Truss Lattice Structures via 3D Sphere Packing
(202011)Truss lattices are common in a wide variety of engineering applications, due to their high ratio of strength versus relative density. They are used both as the interior support for other structures, and as structures on ... 
Manufacturing of screw rotors via 5axis doubleflank CNC machining
(202011)We investigate a recently introduced methodology for 5axis flank computer numerically controlled (CNC) machining, called doubleflank milling [1]. We show that screw rotors are well suited for this manufacturing approach ... 
SPM 2020 Editorial
(202007)