David Vallés-Pérez

💫 David Vallés Pérez, Premio SEA Tesis 2025 🎓 Con la tesis “Unravelling the complexity of cosmic flows: strong gradients, shock waves and turbulence”, realizada en la Universitat de València ¡Enhorabuena! 📰 sea-astronomia.es/noticias/david… @UV_EG @FacFisicaUV @astrovallesp

Happy to announce the first edition of the Flavourful Physics Workshop @IFICorpuscular, that aims to provide more opportunities to researchers that are part of or actively support the LGBTQ+ community! W/ UV, IFIC, CSIC,IFIC CID, Diversitats UV, the Atlas and @AHEPGroup of IFIC

By the way, several of these analyses were made possible by the vortex-p code: 📝 doi.org/10.1016/j.cpc.… 💾 github.com/dvallesp/vorte… 📔 vortex-particles.github.io Do not hesitate to check it out and to get in touch if you want to use it on your simulations!

Therefore, increased ICM viscosity flattens the velocity fluctuations vs. density fluctuations relation. Be sure to check out the paper to not miss any details! 📝 doi.org/10.3847/1538-4… And many thanks to Tirso Marín-Gilabert for letting me participate in this study!

Final version published in the journal! "Density Fluctuations in the Intracluster Medium: An Attempt to Constrain Viscosity with Cosmological Simulations", by Tirso Marin-Gilabert et al. (incl. myself) 📝 Full text (open-access) in doi.org/10.3847/1538-4…

At the X Meeting on Fundamental Cosmology in Sevilla, Spain, just getting started!

The Perseus cluster as you have never seen it, by vanWeeren+ A plethora of new features are detected in the @LOFAR 150 MHz image, including numerous substructures in the mini halo and extended diffuse emission on a scale of ~1 Mpc permeating the cluster arxiv.org/abs/2410.02863

I'm always late with posting photos, but here they are anyway! A week later, a few shots from my thesis defense.

And here's the final version at the journal webpage! doi.org/10.1016/j.cpc.…

How do you measure the dark-matter mass in galaxy clusters? @astrovallesp and co-authors have developed a scaling relation between cluster mass and the size and intensity of accretion shock-waves. nature.com/articles/s4155… or rdcu.be/dMPCB

I really want to thank the hospitality of the wonderful people at USM in Munich, where this work started during the two months I spent there last summer!

The documentation of the code can be found in vortex-particles.github.io.

The paper mainly concerns an extensive testing of the algorithm and profiling of its implementation for shared-memory platforms.

With vortex-p, the same analyses can be applied to SPH, moving-mesh, meshless finite mass, etc. simulations via the creation of an ad-hoc hierarchy of grids, onto which the original velocity field is represented through a (special) kernel summation.

We present a new algorithm, based on our previous vortex code, to perform - A Helmholtz-Hodge decomposition (compressive + solenoidal) - A Reynolds decomposition (bulk + turbulent), using an adaptive, iterative, multi-scale filter on particle-based, moving-mesh or meshless

simulated velocity fields. These problems are (more) straightforward for fixed, uniform grids, but become quite more complicated when it comes to data not uniformly sampled in space. In 2021 we addressed the problem for patch-based AMR implementations in the original vortex code