Results 31 to 40 of about 190 (54)

Dynamics of chains grafted on solid wall during polymer melt extrusion [PDF]

, 2003
The objective of the present work is the mathematical modeling of the dynamics of polymer molecules grafted on a solid boundary during polymer melt extrusion.
Molenaar, J., Slot, J.J.M., Tchesnokov, M.A.   +2 more
core   +1 more source

The fully-implicit log-conformation formulation and its application to three-dimensional flows

, 2015
The stable and efficient numerical simulation of viscoelastic flows has been a constant struggle due to the High Weissenberg Number Problem. While the stability for macroscopic descriptions could be greatly enhanced by the log-conformation method as ...
Knechtges, Philipp
core   +1 more source

Elastic director vibrations in nematic liquid crystals [PDF]

, 2014
Recently Biscari, DiCarlo and Turzi [Anisotropic wave propagation in nematic liquid crystals, Soft Matter 10, 8296-8307.] proposed a theory for nematoacustics which models nematic liquid crystals as nematic elastomers with molecular relaxation.
Turzi, STEFANO SIMONE
core   +3 more sources

THE NUMERICAL SOLUTION OF FREE CONVECTION FLOW OF VISCOELASTIC FLUID PAST OVER A SPHERE [PDF]

, 2015
Free convection flow is heat transfer on fluid caused by buoyancy forces because of density difference. We further use The boundary layer theory to obtain governing equations.
Basuki Widodo, ., Chairul Imron, ., Wayan Rumite, .   +2 more
core  

Global generalized solutions for Maxwell-alpha and Euler-alpha equations

, 2011
We study initial-boundary value problems for the Lagrangian averaged alpha models for the equations of motion for the corotational Maxwell and inviscid fluids in 2D and 3D. We show existence of (global in time) dissipative solutions to these problems. We
Adams R A, Arsenio D Saint-Raymond L, Bardos K, Busuioc A V, Dmitry Vorotnikov, Duchon J, Evans L C, Filippov A F, Filippov A F, Guillopé C Saut J-C, Holm D D Kouranbaeva S Marsden J E Ratiu T Shkoller S, Larson R, Lions P-L, Lions P-L, Lions P-L, Reiner M, Reissig M, Renardy M, Surya Prasath V B Vorotnikov D, Temam R, Villani C, Vorotnikov D, Vorotnikov D   +22 more
core   +1 more source

Some controllability results for linear viscoelastic fluids [PDF]

, 2012
We analyze the controllability properties of systems which provide a description, at first approximation, of a kind of viscoelastic fluid. We consider linear Maxwell fluids.
Boldrini, José Luiz, Doubova Krasotchenko, Anna, Fernández Cara, Enrique, González Burgos, Manuel   +3 more
core   +1 more source

Fully-implicit log-conformation formulation of constitutive laws

, 2014
Subject of this paper is the derivation of a new constitutive law in terms of the logarithm of the conformation tensor that can be used as a full substitute for the 2D governing equations of the Oldroyd-B, Giesekus and other models.
Behr, Marek, Elgeti, Stefanie, Knechtges, Philipp   +2 more
core   +1 more source

Stability of a two-dimensional Poiseuille-type flow for a viscoelastic fluid [PDF]

, 2015
A viscoelastic flow in a two-dimensional layer domain is considered. An L2-stability of the Poiseuille-type flow is established provided that both Poiseuille flow and perturbation is sufficiently small.
Endo, Masakazu, GIGA, YOSHIKAZU, Gotz, Dario, Liu, Chun   +3 more
core   +1 more source

Global in time solutions for the Poiseuille flow of Oldroyd type in 3D domains [PDF]

, 2001
A Poiseuille flow in a 3D cylindrical domain is considered for a non-newtonian fluid of Oldroyd type. We prove existence (and uniqueness) of a global (in time) weak solution. Moreover, this weak solution is an strong solution when data are more regular.
Climent Ezquerra, María Blanca, Guillén González, Francisco Manuel   +1 more
core  

Global solutions to the $n$-dimensional incompressible Oldroyd-B model without damping mechanism

, 2020
The present work is dedicated to the global solutions to the incompressible Oldroyd-B model without damping on the stress tensor in $\mathbb{R}^n(n=2,3)$. This result allows to construct global solutions for a class of highly oscillating initial velocity.
Zhai, Xiaoping
core