Beiträge zu Proceedings

Phase change materials (PCM) are an emerging class of materials in whichdifferent phases of the same material may have different optical, electric, ormagnetic properties and can be used as a phase change memory [1]. Phase-change memory materials, exemplified by (Ag, In)-doped Sb2Te (AIST) in thisresearch, have several advantages, including high-speed read and writeoperations, non-volatility, and a long lifespan [2]. [...]

Deep learning has revolutionized a wide array of tasks across differentdomains, including electron microscopy (EM) image analysis, by leveraginglarge labeled datasets for training. However, the scarcity of such labeleddatasets in EM necessitates the exploration of alternative methods. [...]

This contribution focuses on a Schwarz-type domain decomposition method for solving an ill-conditioned dense linear problem overdetermined with complex coefficients arising from the inverse problem of determining, by the method of equivalent sources, the aeroacoustic noise generated by a fluid on the surface of a body..

We aim to answer the following question: is the complexity of numerically solving Poisson’s equation increasing or decreasing for very large DNS and LES simulations of incompressible flows? Physical and numerical arguments are combined to derive power-law scalings at very high Reynolds numbers. Theoretical convergence analysis for both Jacobi and multigrid solvers defines a two-dimensional phase space divided into two regions, depending whether the number of solver iterations tend to decrease or increase with the Reynolds number. [...]

A three-dimensional finite volume method solver that runs on an adaptive overset mesh is developed for supersonic flows. The solver utilizes the open source libraries of p4est and OpenFOAM utilities to generate, maintain, and readapt the computational grids in a distributed memory architecture during parallel runs supported by MPI. [...]

In this work, spectral deferred corrections (SDC) methods are considered as parallel-in-time integrators for the solution of the unsteady incompressible Navier-Stokes equations. These temporal methods are coupled with a high-order finite element spatial approximation. [...]

This work introduces a parallel unstructured conservative level-set method for liquid-vapor phase change phenomena. The finite-volume method discretizes transport equations on three-dimensional collocated unstructured meshes. [...]

This study introduces a GPU-accelerated numerical framework based on the projection method (PM) for simulating incompressible flows. The core of this approach is an efficient solution of the pressure Poisson equation using a V-cycle geometric multigrid scheme, further enhanced by Coarse Grid Aggregation (CGA) to optimize multigrid levels across multiple GPUs, resulting in substantial performance improvements. [...]

This study assesses the performance of both high and low Reynolds number eddy-viscosity turbulence models in simulating a simplified Reactor Vessel Auxiliary Cooling System with conjugate heat transfer. For forced convection, the standard 𝑘−𝜀 model and the low Reynolds number Launder-Sharma model show good agreements in streamwise velocity and fluid temperature compared to Direct Numerical Simulation data. [...]