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We present a thermodynamically based approach to the design of models for viscoelastic fluids with stress diffusion effect. In particular, we show how to add a stress diffusion term to some standard viscoelastic rate-type models (Giesekus,…

流体动力学 · 物理学 2021-01-01 Mark Dostalík , Vít Průša , Tomáš Skřivan

In this paper we consider finite dimensional dynamical systems generated by a Lipschitz function. We prove a version of the Whitney's Extension Theorem on compact manifolds to obtain a version of the well-known Lambda Lemma for Lipschitz…

偏微分方程分析 · 数学 2021-09-16 Leonardo Pires , Giuliano G. La Guardia

The dynamics of the cavitation bubble collapse is a fundamental issue for the bubble collapse application and prevention. In present work, the modified forcing scheme for the pseudopotential multi-relaxation-time lattice Boltzmann model…

流体动力学 · 物理学 2016-10-12 Ming-Lei Shan , Chang-Ping Zhu , Cheng Yao , Cheng Yin , Xiao-Yan Jiang

We introduce models for viscoelastic materials, both solids and fluids, based on logarithmic stresses to capture the elastic contribution to the material response. The matrix logarithm allows to link the measures of strain, that naturally…

偏微分方程分析 · 数学 2024-10-10 Gennaro Ciampa , Giulio G. Giusteri , Alessio G. Soggiu

It is shown that viscoelastic wave dispersion and attenuation in a viscoelastic medium with a completely monotonic relaxation modulus is completely characterized by the phase speed and the dispersion-attenuation spectral measure. The…

数学物理 · 物理学 2013-03-11 Andrzej Hanyga

We study the statistics of thermodynamic quantities in two related systems with quenched disorder: A (1+1)-dimensional planar lattice of elastic lines in a random potential and the 2-dimensional random bond dimer model. The first system is…

无序系统与神经网络 · 物理学 2009-11-10 Simon Bogner , Thorsten Emig , Ahmed Taha , Chen Zeng

I solve the Relativistic Navier Stokes Equations assuming boost invariance and rotational symmetry. I compare the resulting numerical solutions for two limiting models of the shear viscosity. In the first model the shear viscosity is made…

核理论 · 物理学 2010-11-19 D. Teaney

We consider the problem of ''energy conserving'' lattice Boltzmann models. A major difficulty observed in previous studies is the coupling between the viscous and thermal waves even at moderate wave numbers. We propose a theoretical…

数值分析 · 数学 2013-09-13 Pierre Lallemand , François Dubois

This paper presents a novel parametrization approach for aeroelastic systems utilizing Koopman theory, specifically leveraging the Koopman Bilinear Form (KBF) model. To address the limitations of linear parametric dependence in the KBF…

流体动力学 · 物理学 2025-05-22 Jiwoo Song , Daning Huang

We consider the linear system of viscoelasticity with the homogeneous Dirichlet boundary condition. First we prove a Carleman estimate with boundary values of solutions of viscoelasticity system. Since a solution $u$ under consideration is…

偏微分方程分析 · 数学 2017-11-28 Oleg Imanuvilov , Masahiro Yamamoto

In this work we propose and analyze an abstract parameter dependent model written as a mixed variational formulation based on Volterra integrals of second kind. For the analysis, we consider a suitable adaptation to the classic mixed theory…

数值分析 · 数学 2020-11-24 Erwin Hernández , Felipe Lepe , Jesus Vellojin

Spectral estimation is a fundamental problem for time series analysis, which is widely applied in economics, speech analysis, seismology, and control systems. The asymptotic convergence theory for classical, non-parametric estimators, is…

统计理论 · 数学 2025-03-13 Yuping Zheng , Andrew Lamperski

The equations of linearized viscoelastodynamics in Kelvin-Voigt rheology are rigorously derived from a nonlinear model that satisfies the time-dependent frame indifference in the sense of Antman. Besides showing the convergence of…

偏微分方程分析 · 数学 2026-03-04 Barbora Benešová , Malte Kampschulte , Martin Kružík

In this note, analysis of time delay systems using Lambert W function approach is reassessed. A common canonical form of time delay systems is defined. We extended the recent results of [6] for second order into nth order system. The…

系统与控制 · 计算机科学 2017-09-05 Niraj Choudhary , Janardhanan Sivaramakrishnan , Indra Narayan Kar

A systematic study for a single-specie lattice Boltzmann model with frustrated-short range attractive and mid/long-range repulsive-interactions is presented. The equilibrium analysis is performed along the guidelines proposed by [X. Shan,…

软凝聚态物质 · 物理学 2014-02-26 M. Sbragaglia , R. Benzi , M. Bernaschi S. Succi

We provide the integral representation formula for the relaxation in $BV(\Omega; \mathbb{R}^M)$ with respect to strong convergence in $L^1(\Omega; \mathbb{R}^M)$ of a functional with a boundary contact energy term. This characterization is…

偏微分方程分析 · 数学 2020-10-09 Riccardo Cristoferi , Giovanni Gravina

We investigate previously unclarified effects of fluid elasticity on shear-thickening in dilute suspensions in an Oldroyd-B viscoelastic fluid using a novel direct numerical simulation based on the smoothed profile method. Fluid elasticity…

软凝聚态物质 · 物理学 2020-12-21 Yuki Matsuoka , Yasuya Nakayama , Toshihisa Kajiwara

The two-body nonleptonic weak decays of \Lambda_b \to \Lambda_c P(V) (P and V represent pseudoscalar and vector mesons respectively) are analyzed in two models, one is the Bethe-Salpeter (B-S) model and the other is the hadronic wave…

高能物理 - 唯象学 · 物理学 2009-10-31 X. -H. Guo

We consider a mathematical model which describes the quasistatic frictionless contact of a viscoelastic body with a rigid-plastic foundation. We describe the mechanical assumptions, list the hypotheses on the data and provide three…

偏微分方程分析 · 数学 2023-09-11 Piotr Bartman , Anna Ochal , Mircea Sofonea

In this study, we delve into the intricate mathematical frameworks essential for the renormalization of effective elastic models within complex physical systems. By integrating advanced tools such as Laurent series, residue theorem, winding…

综合物理 · 物理学 2024-09-24 Wen-Xiang Chen