This paper constitutes an extension of the work of Mendez, Gibaud & Nicoud: An unstructured solver for simulations of deformable particles in flows at arbitrary Reynolds numbers, Journal of Computational Physics, 256(1): 465-483 (2014), for three-dimensional simulations of deformable membranes under flow. An immersed thick boundary method is used, combining the immersed boundary method with a t...

This paper describes an accurate and computationally efficient surrogate method, known as the polynomial dimensional decomposition (PDD) method, for estimating a general class of density-based fsensitivity indices. Unlike the variance-based Sobol index, the f-sensitivity index is applicable to random input following dependent as well as independent probability distributions. The proposed method...

eographically, Indonesia is a maritime country that has around seventeen thousand islands stretchingfrom Sabang to Merauke so been named the largest archipelagic in world.From economic sector, also with fairly stable level of growth. Thisbackground shows there are lot activities Indonesia. Economic activity Indonesianwaters supported by carrying out many infrastructure developments, one which t...

We apply a well-calibrated three-dimensional Monte Carlo simulator using finiteelement meshing to study the intrinsic high-frequency (HF) behaviour of three-terminal nanojunctions based on InGaAs/InAlAs heterostructures. To obtain a reliable prediction of device performance, we use a realistic model for surface charge effects at high-frequency conditions. In this work, we perform an analysis of...

At high frequency, the winding losses of power transformer due to skin and proximity effects becomes a significant component in the loss calculation of the transformer efficiency. This paper examines the winding losses associated with these effects for planar-type low-profile transformers that are suitable for high frequency high density soft switching power supply application. The transformer ...

Climate modeling encompasses an enormous range of spatial and temporal scales. One of its great remaining challenges is bridging the scale gaps between global climate processes, basinscale and regional impacts, and smaller-scale ecosystem dynamics. Improving and accessing enhanced computational resources will help bridge this gap. Nonetheless, enhanced computer power alone is insufficient witho...

We consider a second-order elliptic equation with discontinuous or anisotropic coefficients in a bounded twoor three dimensional domain, and its finiteelement discretization. The aim of this paper is to prove some a priori and a posteriori error estimates in an appropriate norm, which are independent of the variation of the coefficients. Résumé: Nous considérons une équation elliptique du secon...

This paper is concerned with the numerical solution of multiobjective control problems associated with linear (resp., nonlinear) partial differential equations. More precisely, for such problems, we look for Nash equilibria, which are solutions to noncooperative games. First, we study the continuous case. Then, to compute the solution of the problem, we combine finite-difference methods for the...

Electric field enhancement (γ) at the end of a sharp tip is calculated by finiteelement method (FEM). The metal tip is modeled as a 3-D gold hemi-ellipsoid illuminated by two different excitation frequencies in the optical and Terahertz (THz) regimes with the wavelengths of 630 nm and 0.3 mm, respectively. The dependence of field enhancement on apex radius, tip geometry, radiation wavelengths, ...

The design of a beryllium (Be) window for use under the extremely high heat load of an undulator beam is one of the challenges for third-generation synchrotron radiation beamlines. A novel design of a Be window is presented for the Advanced Photon Source (APS) diagnostics undulator beamline, whose beam has a peak power density of 150 W/mm2 (7 GeV/100 mA stored beam). The window has a double con...