#computational-physics — Public Fediverse posts

My implementation of the GaussSeidel smoother using a Diagnol direct access scheme in OpenFOAM as compared to the default GS smoother LDU gives almost ~50% improvements in cache misses and hits for a structured 3D cavity tutorial. Profiled using the amazing LIKWID profiler. Will share a deep technical report soon. Check it out and use - https://github.com/amartyadav/DIAGaussSeidel-Smoother-OpenFOAM
#hpc #scientificcomputing #computationalphysics #cfd #openfoam #likwid #softwaredevelopment #cpp

COLIBRE is a groundbreaking set of advanced cosmological simulations that models the evolution of galaxies by integrating cold interstellar gas and cosmic dust, offering the most realistic digital representation of galaxy formation from the early universe to the present day.
#Astrophysics #Cosmology #ComputationalPhysics #sflorg
https://www.sflorg.com/2026/04/asph04132601.html

Been working on my Linux machine for 3 months now at work - comp. physics, hpc, etc.
Tried working on my MBP yesterday (after around 5 months of not using it for development) - while a superior machine h/w wise, I really couldn't stand macOS.
Linux just works - better even.

#linux #macos #development #hpc #scientificcomputing #computationalphysics #ux #ubuntu #SoftwareDevelopment

Ah yes, the riveting world of "Computational Physics"—now in its thrilling second edition! 🎉 Dive into endless online resources and sample chapters, because who wouldn't want to print out *entire* figures for fun? 📚✨ Remember, #feedback is welcome, as if the cosmos itself was waiting for your opinion! 🌌😂
https://websites.umich.edu/~mejn/cp2/ #ComputationalPhysics #OnlineResources #ScienceEducation #PhysicsFun #HackerNews #ngated

Computational Physics (2nd Edition)

https://websites.umich.edu/~mejn/cp2/

#HackerNews #ComputationalPhysics #ComputationalPhysics2ndEdition #PhysicsResources #UMich #Publications #STEMEducation

My latest blog post explores a Multi-Material Thermal Analysis using HYPRE BoomerAMG with a custom POSIT accelerator called Uttunga, and compares it to the x86 IEEE 754 standard.

https://www.amartyadav.com/posts/post3.html

#computationalphysics #hpc #opensource #scientificcomputing #thermalphysics #Automotive #automotiveengineering #calligo #posit #ieee_754

Postdoctoral Fellowship in Thermal Transport or Phase Change Materials
Shandong University

See the full job description on jobRxiv: https://jobrxiv.org/job/shandong-university-27778-postdoctoral-fellowship-in-thermal-transport-or-phase-change-materials/

#computationalphysics #materialsscience #phasetransitions #thermaltransport #ScienceJobs #hiring #researc...
https://jobrxiv.org/job/shandong-university-27778-postdoctoral-fellowship-in-thermal-transport-or-phase-change-materials/?fsp_sid=9921

「本資料は原子核三者若手夏の学校 2025の原子核パート「Julia言語による原子核構造計算入門」での使用を目的として開発した資料です。」

https://sotayoshida.github.io/Lecture_SummerSchool2025/home.html

https://github.com/sotayoshida/pairinghamiltonians.jl

#Julia #Physics #NuclearPhysics #ComputationalPhysics #Hamiltonian

After four months of deep work in computational physics and wafer-scale computing using the Cerebras WSE-3 as part of my MSc dissertation, my tutorial has been accepted at Supercomputing India 2025!” in Bengaluru.
Excited to contribute and share practical insights with the HPC community.
#hpc #supercomputingindia2025 #sci2025 #cerebras #cdac #computationalphysics #scientificcomputing #Conference

An important piece of history:
#computationalphysics #womeninstem #research #science #history
👩‍🔬

https://physicsworld.com/a/the-forgotten-pioneers-of-computational-physics/

📐✨ "Look, it's a magic math library that defies the laws of computational physics with O(1) complexity—because who needs logic when you have buzzwords? 🤖🔮 Meanwhile, GitHub's throwing AI at your code like confetti, hoping something sticks." 🎉💻
https://github.com/mxfactorial/geonum #magicmath #O1complexity #AIinCoding #GitHubInnovation #computationalphysics #buzzwords #HackerNews #ngated

Structure and Interpretation of Classical Mechanics

https://tgvaughan.github.io/sicm/toc.html

#HackerNews #StructureAndInterpretation #ClassicalMechanics #Physics #Education #ComputationalPhysics

#PhysicsFactlet
In its simplest form Monte-Carlo integration allows to estimate a area/volume with complicated boundaries by taking a number of samples and looking at which fraction fall inside the object of interest.

#ComputationalPhysics #Integration

#PhysicsFactlet
The most naïve way to integrate (ordinary) differential equations, like the equation of motion of a simple pendulum, is to use the instantaneous velocity to update the position, and the instantaneous force to update the velocity (known as the Euler method). While this is simple and intuitive, it accumulates errors very quickly and (importantly) doesn't conserve energy.

#Physics #ComputationalPhysics

Grid-Free Approach to Partial Differential Equations on Volumetric Domains [pdf]

http://rohansawhney.io/RohanSawhneyPhDThesis.pdf

#HackerNews #GridFree #PDEs #VolumetricDomains #MathematicalModeling #ComputationalPhysics

More than a decade ago, I developed my own spring-mass, soft body physics engine, and my passion for physical simulation never stopped. At Siggraph 2024 a groundbreaking method will be presented: Vertex Block Descent by Anka He Chen. This technique offers faster convergence and superior performance in elastic body dynamics simulations.

Vertex Block Descent by Anka He Chen even comes with code:
https://ankachan.github.io/Projects/VertexBlockDescent/index.html

#ComputationalPhysics #cfd #physics #Simulation #SIGGRAPH2024

I also want to explore more #GeometricAlgebra applied to #physics and #ComputationalPhysics (not necessarily for #FluidDynamics and #CFD, but that would be preferable as it's obviously our primary topic of relevance). I can't seem to find anything that combines #SPH and GA, so it might even lead to some new interesting venues to explore.

3/n

#ComputationalFluidDynamics #SmoothedParticleHydrodynamics

Independent verification of results is an important part of the #scientific process. However - in #physics at least - #replication and #verification studies rarely seem to be published. Despite this, I decided to attempt to verify the results of a groundbreaking Nature Physics paper from 2012, in which the authors describe the first dynamical #quantum #simulator. You can read the fruits of my labour in my #arxiv preprint: "Classical verification of a quantum simulator: local relaxation of a 1D Bose gas". I hope you find it interesting.

https://scirate.com/arxiv/2401.05301

#ScientificProcess #QuantumSimulator #QuantumSimulation #QuantumAdvantage #science #ClassicalVerification #ComputationalPhysics #ParallelComputing #HPC #HighPerfomanceComputing #supercomputer #TensorNetworks #MatrixProductStates #TEBD

...the black hole in question has non-zero linear momentum in X-direction, which is why the plot isn't isotropic in XY plane.

Are #relativity #computationalphysics tags a thing?

🎉 Congratulations to Martin Trappe & Ryan Chisholm for their paper in Nature Communications!

They used density functional theory from physics to make spatial ecosystem models. This general computational framework makes predictions that are as good as specialised models on systems from predatory microbes to territorial flies to trees

https://rdcu.be/c6vQP

#physics #ecology #ecosystem #modelling #modeling #functionals #DFTe #densityfunctionaltheory #computationalphysics #quantummechanics

Has anyone here used "Meep" for photonics simulation? I am looking into open source electromagnetics software.
#meep #computationalPhysics #optics #photonics

I was surprised to see my simulation code isn't deterministic with the same inputs (incl. rng seed), until I remembered that floating point operations are non-commutative and the order of atomic operations on the GPU is essentially random.

#GPGPU #ComputationalPhysics