Abstract ‘Fluid buckling’ is a phenomenon characterized mainly by the existence of fluid toroidal oscillations during flow. It appears when high viscosity flows vertically against flat surface and may occur in industrial applications, as injection molding propergol complex‐shaped cavities. These coiling or folding appear mold filling stage, leading to air entrapment. To understand model this free flow problem, convected level set method proposed. First, sinus filter applied distance function...

This paper presents CIMLIB with its two main characteristics: an Object Oriented Program and a fully parallel code. aims at providing set of components that can be organized to build numerical simulation certain process. We describe components: one treats the complex task remeshing, other puts focus on Finite Element modeling. In second part, we present some performances example very large (over mesh 25 millions nodes) begins generation ends up writing results files, all done using 88 processors.

This work aims to introduce a groundbreaking approach by directly computing the Fokker–Planck equation, providing mesoscopic scale orientation indicator based on 2D-probability density function (PDF) of fibers' state. Unlike conventional methods that rely pre-averaged quantities and closure approximations, our method offers enhanced accuracy information preservation. The model's can be served as foundational tool for future studies, enabling development comprehensive models describing...

Abstract Spark plasma sintering (SPS) belongs to a class of techniques that employs electric current assist compaction. This technology seems very promising obtain net‐shape components made intermetallic alloys with fine microstructure. However, the SPS process is difficult stabilize because density heterogeneities arising from non‐homogeneous temperature or stress in powder. motivates development three‐dimensional finite element simulation order understand distribution current, and...

Mesh adaptation has proven to be very efficient for simulating transient multiphase computational fluid dynamics applications. In this work, we present a new parallel anisotropic mesh technique relying on an edge based error estimator. It provides high level of accuracy while substantially reducing the effort. This enables good capture physical phenomena, boundary layers, interfaces, free surfaces and even turbulent flows, great potential simulate large variety Current investigations explore...

The reflectance confocal microscopy (RCM)-optical coherence tomography (OCT) device has shown utility in detecting and assessing the depth of basal cell carcinoma (BCC) vivo but is challenging for novices to interpret. Artificial intelligence (AI) applied RCM-OCT could aid readers. We trained AI models, using OCT rasters biopsy-confirmed BCC, detect create three-dimensional rendering automatically measure tumour depth. Trained models were a separate test set containing benign lesions,...

Nous présentons une méthode d'interaction fluide-structure basée sur approche monolithique eulérienne permettant d'étudier à différentes échelles les procédés de mélange sous leur aspect dispersif et distributif. Une première macroscopique traitant la résolution mécanique dans le procédé, où interviennent des outils tournants, est présentée, puis microscopique modélisant dispersion d'un agglomérat, enfin couplée via théorie cinétique.

The flow motion of solid particle suspensions is a fundamental issue in many problems practical interest. velocity field such system computed by finite element method with multi-domain approach two phases (namely viscous fluid and rigid bodies), whereas the displacement made particulate method. We focus our paper on simple shear Newtonian fluid.

In this paper, a work performed to allow massively parallel finite element flow computations is presented. It includes the development and optimisation of two particular features multiphase computational fluid dynamics software, which are mesh generation linear system solution, using anisotropic adaptation multigrid preconditioning. Parallel performances on supercomputers shown, where largest generated (on 65 536 Intel Xeon or 261 144 Power PC cores) had 33.4 billions nodes, leading 100...

Abstract Typical strategies for reducing the computational cost of contact mechanics models use low‐rank approximations. The underlying hypothesis is existence a low‐dimensional subspace displacement field and non‐negative subcone pressure. However, given local nature contact, it seems natural to wonder whether approximations are good fit or not. In this article, we investigate some their limitations provide numerical evidence showing that pressure linearly inseparable in many practical...

Time sequences of 3D images an Al-Cu alloy in the mushy state are obtained using situ and real-time X-ray microtomography during a tensile test.Surface meshes phase interfaces built from these with help Marching Cubes algorithm.The signed distance to surface is then computed on finite element mesh volume phases.These functions enable track between phases implicit way.A numerical representation real microstructure thus obtained, allowing perform test which compared experimental test.Results...

The recent financial crisis has renewed the interest of economists, both at theoretical and empirical level, in developing a better understanding credit its mechanisms.A rapidly growing strand literature views banks as facing funding restrictions that condition their borrowing to risk-based capital constraint which, turn, affects bank lending.This work explores way Colombia manage balance sheet sheds light into dynamics leverage over business cycle.Using sample monthly sheets for period...

In this paper we study the interrelation between capital flows and financial stability in Colombia 1995 2011 using quarterly data.Using level cointegrated VAR models it is found that even though does not seem to exist a significant direct correlation stability, there an indirect relationship these two variables mediated by ratio loans/GDP.

We set a dynamic stochastic model for the interbank daily market funds in Colombia.The framework features exogenous reserve requirements and requirement period, competitive trading among heterogeneous commercial banks, open operations he ld by Central Bank (auctions window facilities), idiosyncratic demand shocks uncertainty auction.Analytical derivations of their decision making process show that banks involvement depend on individual constraint liquid assets.Our results do not linkage...