Instability of a Low Viscosity Jet Emerging into a High Viscosity Medium: Linear Stability Analysis [PDF]
arXiv, 2023 Many natural and engineering systems involve the mixing of two fluid streams, in which the effects of density and viscosity gradients play important roles in determining flow stability. We perform linear stability calculations for a jet emerging into an ambient medium of a different viscosity but the same density.
arxiv
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
Large variability in the motility of spiroplasmas in media of different viscosities [PDF]
Scientific Reports, 2018 AbstractSpiroplasmas are bacteria that do not possess flagella and their motility is linked to kink propagation coupled to changes in the cell body helicity. While the motility of bacteria with flagellar motion has been studied extensively, less work has been devoted to the motility of spiroplasmas.
Boudet, Jean-François +5 more
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Viscosity solutions to quaternionic Monge-Ampère equations [PDF]
, 2015 Quaternionic Monge-Amp\`{e}re equations have recently been studied intensively using methods from pluripotential theory. We present an alternative approach by using the viscosity methods. We study the viscosity solutions to the Dirichlet problem for quaternionic Monge-Amp\`{e}re equations $det(f)=F(q,f)$ with boundary value $f=g$ on $\partial\Omega ...
arxiv +1 more source
Artificial viscosity in simulation of shock waves by smoothed particle hydrodynamics [PDF]
Astrophys.Space Sci.313:425-430,2008, 2007 The artificial viscosity is reconsidered in smoothed particle hydrodynamics to prevent inter-particle penetration, unwanted heating, and unphysical solutions. The coefficients in the Monaghan's standard artificial viscosity are considered as time variable, and a restriction on them is proposed such that avoiding the undesired effects in the subsonic ...
arxiv +1 more source
Viscous Boundary Value Problems for Symmetric Systems with Variable Multiplicities [PDF]
, 2006 Extending investigations of M\'etivier&Zumbrun in the hyperbolic case, we treat stability of viscous shock and boundary layers for viscous perturbations of multidimensional hyperbolic systems with characteristics of variable multiplicity, specifically ...
Gues, Olivier +3 more
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Viscosity solutions to Parabolic complex Hessian type equations [PDF]
arXiv, 2022 In this paper, we show the existence and uniqueness of viscosity solution to the Cauchy-Dirichlet problem for a class of fully nonlinear parabolic equations. This extends recent results of Eyssidieux-Guedj-Zeriahi.
arxiv
A quasilinear differential inclusion for viscous and rate-independent damage systems in non-smooth domains [PDF]
, 2013 This paper focuses on rate-independent damage in elastic bodies. Since the driving energy is nonconvex, solutions may have jumps as a function of time, and in this situation it is known that the classical concept of energetic solutions for rate ...
Knees, Dorothee +2 more
core +4 more sources
Applied Sciences, 2016 It is well known that the best way of convective heat transfer is the flow of nanofluids through a porous medium. In this regard, a mathematical model is presented to study the effects of variable viscosity, thermal conductivity and slip conditions on ...
Sajid Hussain +3 more
doaj +1 more source
Melt flow in a variable viscosity matrix [PDF]
Geophysical Research Letters, 1998 It is often assumed that the molten regions of planetary interiors can be modeled as a compacting viscous matrix permeated by a less viscous melt phase. In order to assess the true behaviour, it is important to test as many different aspects of these models as possible. In the calculations presented here, the matrix viscosity is made to decrease as the
openaire +2 more sources