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We present a unified description of first-order cosmological phase transition dynamics that links the phenomenological friction model employed in hydrodynamic simulations to the microscopic treatment based on Boltzmann equations. We derive…

宇宙学与河外天体物理 · 物理学 2026-03-26 Tomasz Krajewski , Marek Lewicki , Marco Merchand , Ignacy Nałęcz , Mateusz Zych

We study the steady state motion of bubble walls in cosmological phase transitions. Taking into account the boundary and continuity conditions for the fluid variables, we calculate numerically the wall velocity as a function of the…

高能物理 - 唯象学 · 物理学 2009-07-22 Ariel Megevand , Alejandro D. Sanchez

In this work, we detail the GPU-porting of an in-house pseudo-spectral solver tailored towards large-scale simulations of interface-resolved simulation of drop- and bubble-laden turbulent flows. The code relies on direct numerical…

流体动力学 · 物理学 2024-06-04 Alessio Roccon

This paper presents BubbleID, a sophisticated deep learning architecture designed to comprehensively identify both static and dynamic attributes of bubbles within sequences of boiling images. By amalgamating segmentation powered by Mask…

图像与视频处理 · 电气工程与系统科学 2024-05-15 Christy Dunlap , Changgen Li , Hari Pandey , Ngan Le , Han Hu

Bubbling is a run-time graph transformation studied for the execution of non-deterministic steps in functional logic computations. This transformation has been proven correct, but as currently formulated it requires information about the…

编程语言 · 计算机科学 2018-08-27 Sergio Antoy , Steven Libby

The phase-field method has become a useful tool for the simulation of classical metallurgical phase transformations as well as other phenomena related to materials science. The thermodynamic consistency that forms the basis of these…

In this paper, we investigate the dynamics of the nucleating scalar field during the first-order phase transitions by incorporating one-loop corrections of classical fluctuations. We assume that a high-temperature expansion is valid\te…

高能物理 - 唯象学 · 物理学 2025-03-07 Andrii Dashko , Andreas Ekstedt

Finding numerical solutions describing bubble nucleation is notoriously difficult in more than one field space dimension. Traditional shooting methods fail because of the extreme non-linearity of field evolution over a macroscopic distance…

广义相对论与量子宇宙学 · 物理学 2017-02-01 Ali Masoumi , Ken D. Olum , Benjamin Shlaer

The current work presents a novel COllaborative Open-source Lattice Boltzmann Method framework, so-called CooLBM. The computational framework is developed for the simulation of single and multi-component multi-phase problems, along with a…

计算物理 · 物理学 2025-02-19 R. Alamian , A. K. Nayak , M. S. Shadloo

This is the first in a series of papers where we study the dynamics of a bubble wall beyond usual approximations, such as the assumptions of spherical bubbles and infinitely thin walls. In this paper, we consider a vacuum phase transition.…

广义相对论与量子宇宙学 · 物理学 2023-06-28 Ariel Mégevand , Federico Agustín Membiela

Spectangular is a GUI based software package written in C++ designed for spectral disentangling on the wavelength scale. The code disentangles spectra of SB1 and SB2 systems and can now also be used also for spectra showing variability. In…

天体物理仪器与方法 · 物理学 2019-02-27 Daniel P. Sablowski , Silva Järvinen , Michael Weber

We present a particle method for estimating the curvature of interfaces in volume-of-fluid simulations of multiphase flows. The method is well suited for under-resolved interfaces, and it is shown to be more accurate than the parabolic…

计算物理 · 物理学 2020-01-23 Petr Karnakov , Sergey Litvinov , Petros Koumoutsakos

Many interesting phenomena are characterized by the complex interaction of different physical processes, each often best modeled numerically via a specific approach. In this paper, we present the design and implementation of an…

数学软件 · 计算机科学 2025-10-20 Juan Michael Sargado

In non-linear systems, where explicit analytic solutions usually can't be found, visualisation is a powerful approach which can give insights into the dynamical behaviour of models; it is also crucial for teaching this area of mathematics.…

数学软件 · 计算机科学 2016-01-20 Robert Merrison-Hort

We develop a framework to study the phase space of a system consisting of a scalar field rolling down an arbitrary potential with varying slope and a background fluid, in a cosmological setting. We give analytical approximate solutions of…

天体物理学 · 物理学 2008-11-26 S. C. C. Ng , N. J. Nunes , F. Rosati

Cryogenic fluids have extensive applications as fuel for launch vehicles in space applications and research. The physics of cryogenic flows are highly complex due to the sensitive nature of phase transformation from liquid to bubbly liquid…

流体动力学 · 物理学 2024-12-30 Premchand V Chandra , Anuja Vijayan , Pradeep Kumar P

We present a new method to estimate terminal bubble velocities during first-order phase transitions in a plasma in local equilibrium. The method relies on calculating the extrema of a modified potential function for the scalar field…

高能物理 - 唯象学 · 物理学 2025-12-01 Martin Münzenberg , Carlos Tamarit

This paper presents a 2D/3D Free Surface Lattice Boltzmann Method simulation package called LBfoam for the simulation of foaming processes. The model incorporates the essential physics of foaming phenomena: gas diffusion into nucleated…

Bubbly flows, as present in bubble column reactors, can be simulated using a variety of simulation techniques. In order to gain high resolution CFD methods are used to simulate a pseudo 2D bubble column using EL and EE techniques. The…

流体动力学 · 物理学 2017-06-20 Andreas Weber , Hans-Jörg Bart

We present a framework for efficiently performing Monte Carlo wave-function simulations in cavity QED with moving particles. It relies heavily on the object-oriented programming paradigm as realised in C++, and is extensible and applicable…

量子物理 · 物理学 2009-11-13 A. Vukics , H. Ritsch