The Universe With Bulk Viscosity [PDF]
, 1998 Exact solutions for a model with variable $G$, $\Lambda$ and bulk viscosity are obtained. Inflationary solutions with constant (de Sitter-type) and variable energy density are found.
Arbab A. I. +5 more
core +4 more sources
On variable viscosity and enhanced dissipation
, 2022 In this article we consider the 2D Navier-Stokes equations with variable viscosity depending on the vertical position. As our main result we establish linear enhanced dissipation near the non-affine stationary states replacing Couette flow. Moreover it turns out that the shear flow overcompensates for weakening viscosity: decreasing viscosity leads to ...
Liao, Xian, Zillinger, Christian
openaire +1 more source
Balanced-Viscosity solutions for multi-rate systems [PDF]
, 2014 Several mechanical systems are modeled by the static momentum balance for the displacement $u$ coupled with a rate-independent flow rule for some internal variable $z$. We consider a class of abstract systems of ODEs which have the same structure, albeit
Mielke, Alexander +2 more
core +3 more sources
Variability of Saliva Viscosity - Potential Impact
, 2022 As novel COVID-19 testing develops, saliva has become of increasing interest as an alternate biological sample for rapid testing. The appeal in saliva-based testing lies within the ease of which samples are collected, as well as patient comfort throughout the collection process.
Lara, Eltze, +2 more
openaire +3 more sources
The detection of lubricating oil viscosity changes in gearbox transmission systems driven by sensorless variable speed drives using electrical supply parameters [PDF]
, 2015 Lubrication oil plays a decisive role to maintain a reliable and efficient operation of gear transmissions. Many offline methods have been developed to monitor the quality of lubricating oils.
A D Ball +19 more
core +1 more source
Asymptotic analysis of the Stokes flow with variable viscosity in a thin elastic channel
Networks and Heterogeneous Media, 2010 The non-steady viscous flow in a thin channel with elastic wall is considered.The viscosity is constant everywhere except for some small neighborhood of the origin of the coordinate system, where it is a variable function.The problem contains two small ...
Grigory Panasenko, Ruxandra Stavre
doaj +1 more source
Application of the Yin-Yang grid to a thermal convection of a Boussinesq fluid with infinite Prandtl number in a three-dimensional spherical shell [PDF]
, 2004 A new numerical finite difference code has been developed to solve a thermal convection of a Boussinesq fluid with infinite Prandtl number in a three-dimensional spherical shell.
Akira Kageyama +21 more
core +1 more source
Numerical methods for an optimal order execution problem [PDF]
, 2010 This paper deals with numerical solutions to an impulse control problem arising from optimal portfolio liquidation with bid-ask spread and market price impact penalizing speedy execution trades.
Guilbaud, Fabien +2 more
core +4 more sources
Stochastic homogenization for functionals with anisotropic rescaling and non-coercive Hamilton-Jacobi equations [PDF]
, 2017 We study the stochastic homogenization for a Cauchy problem for a first-order Hamilton-Jacobi equation whose operator is not coercive w.r.t. the gradient variable.
Dirr, Nicolas +3 more
core +4 more sources
Viscous Dark Energy Models with Variable G and Lambda
, 2007 We consider a cosmological model with bulk viscosity ($\eta$) and variable cosmological $(\Lambda\propto \rho^{-\alpha}, \alpha=\rm const.$) and gravitational ($G$) constants. The model exhibits many interesting cosmological features.
Arbab A I +4 more
core +1 more source