Tootfinder

Bad news: Flaky WiFi at my desk even w mesh satellite just 12ft (4m) away, and the satellite only 12ft from mesh router.
Good news: I can move ISP's modem-router combo where the mesh router is, get rid of mesh, and get better WiFi at my desk. Lower cable aesthetic per my wife but nothing some drywall work can't fix. 😉
The free ISP router is surprisingly good: 802.11ax, 2x 5GHz, 1x 2.4GHz, strong signal throughout home except 2 rooms upstairs at opposite end.

Comparison of adaptive mesh refinement techniques for numerical weather prediction
Daniel S. Abdi, Ann Almgren, Francis X. Giraldo, Isidora Jankov
https://arxiv.org/abs/2404.16648

Comparison of adaptive mesh refinement techniques for numerical weather prediction
This paper examines the application of adaptive mesh refinement (AMR) in the field of numerical weather prediction (NWP). We implement and assess two distinct AMR approaches and evaluate their performance through standard NWP benchmarks. In both cases, we solve the fully compressible Euler equations, fundamental to many non-hydrostatic weather models. The first approach utilizes oct-tree cell-based mesh refinement coupled with a high-order discontinuous Galerkin method for spatial discretizat…

Saturday at the beach (in FL), saw a (very) fat-tired wheel chair. Not sure this works for self-propulsion, but given the sand, wheels that large seem necessary. Maybe a hovercraft wheelchair (and eelchair!) would also work.

Older shop windows in New Orleans.
1) Algiers Point - Renecky Shoe Co
2)Algiers Point - Whiskey & Wines
3)Freret Street, 13th Ward - Big Shot, Oil Change
4)Gentilly - Air Conditioned Drugs
Photos by Infrogmation of New Orleans
@…
#FensterFriday

This https://arxiv.org/abs/2312.05438 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Adaptive mesh refinement in binary black holes simulations
We discuss refinement criteria for the Berger-Rigoutsos (block-based) refinement algorithm in our numerical relativity code GR-Athena++ in the context of binary black hole merger simulations. We compare three different strategies: the "box-in-box" approach, the "sphere-in-sphere" approach and a local criterion for refinement based on the estimation of truncation error of the finite difference scheme. We extract and compare gravitational waveforms using the three different mesh refinement method…

This https://arxiv.org/abs/2404.15891 has been replaced.
link: https://scholar.google.com/scholar?q=a

OMEGAS: Object Mesh Extraction from Large Scenes Guided by Gaussian Segmentation
Recent advancements in 3D reconstruction technologies have paved the way for high-quality and real-time rendering of complex 3D scenes. Despite these achievements, a notable challenge persists: it is difficult to precisely reconstruct specific objects from large scenes. Current scene reconstruction techniques frequently result in the loss of object detail textures and are unable to reconstruct object portions that are occluded or unseen in views. To address this challenge, we delve into the met…

This https://arxiv.org/abs/2309.13555 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Sensitivity analysis of wall-modeled large-eddy simulation for separated turbulent flow
In this study, we conduct a parametric analysis to evaluate the sensitivities of wall-modeled large-eddy simulation (LES) with respect to subgrid-scale (SGS) models, mesh resolution, wall boundary conditions and mesh anisotropy. While such investigations have been conducted for attached/flat-plate flow configurations, systematic studies specifically targeting turbulent flows with separation are notably sparse. To bridge this gap, our study focuses on the flow over a two-dimensional Gaussian-sha…

This https://arxiv.org/abs/1806.00095 has been replaced.
link: https://scholar.google.com/scholar?q=a

Piecewise flat Ricci flow of compact without boundary three-manifolds
Using a recently developed piecewise flat method, numerical evolutions of the Ricci flow are computed for a number of manifolds, using a number of different mesh types, and shown to converge to the expected smooth behaviour as the mesh resolution is increased. The manifolds were chosen to have varying degrees of homogeneity, and include Nil and Gowdy manifolds, a three-torus initially embedded in Euclidean four-space, and a perturbation of a flat three-torus. The piecewise flat Ricci flow of th…

GPolylla: Fully GPU-accelerated polygonal mesh generator
Sergio Salinas-Fern\'andez, Nancy Hitschfeld-Kahler, Roberto Carrasco
https://arxiv.org/abs/2403.14723

GPolylla: Fully GPU-accelerated polygonal mesh generator
This work presents a fully GPU-accelerated algorithm for the polygonal mesh generator known as Polylla. Polylla is a tri-to-polygon mesh generator, which benefits from the half-edge data structure to manage any polygonal shape. The proposed parallel algorithm introduces a novel approach to modify triangulations to get polygonal meshes using the half-edge data structure in parallel on the GPU. By changing the adjacency values of each half-edge, the algorithm accomplish to unlink half-edges that …

This https://arxiv.org/abs/2206.02217 has been replaced.
link: https://scholar.google.com/scholar?q=a

Learning Mesh Motion Techniques with Application to Fluid-Structure Interaction
Mesh degeneration is a bottleneck for fluid-structure interaction (FSI) simulations and for shape optimization via the method of mappings. In both cases, an appropriate mesh motion technique is required. The choice is typically based on heuristics, e.g., the solution operators of partial differential equations (PDE), such as the Laplace or biharmonic equation. Especially the latter, which shows good numerical performance for large displacements, is expensive. Moreover, from a continuous perspec…