Browsing by Subject "Shear stress"
Now showing items 116 of 16

Article
An analytical solution for rapidly distorted turbulent shear flow in a rotating frame
(2006)In this study we apply rapid distortion theory to the case of nonstratified homogeneous turbulence that is sheared in a frame that counterrotates at a rate that matches in magnitude the rotation associated with the mean ...

Article
Cessation of Newtonian circular and plane Couette flows with wall slip and nonzero slip yield stress
(2017)We solve analytically the cessation flows of a Newtonian fluid in circular and plane Couette geometries assuming that wall slip occurs provided that the wall shear stress exceeds a critical threshold, the slip yield stress. ...

Article
Compressible viscous flow in slits with slip at the wall
(1994)We study the timedependent compressible flow of a Newtonian fluid in slits using an arbitrary nonlinear slip law relating the shear stress to the velocity at the wall. This slip law exhibits a maximum and a minimum and ...

Article
Development lengths in Newtonian Poiseuille flows with wall slip
(2016)The effect of wall slip on the development of planar and axisymmetric Newtonian Poiseuille flows is studied by means of finite element simulations. The Navier slip law is employed. i.e., it is assumed that the slip velocity ...

Article
Direct numerical simulation of particle laden flow in a human airway bifurcation model
(2016)During the delivery of inhaled medicines, and depending on the size distribution of the particles in the formulation, airway bifurcations are areas of preferential deposition. Previous studies of laminar flow through airway ...

Article
The Effect of Head Rotation on the Geometry and Hemodynamics of Healthy Vertebral Arteries
(2015)The geometric and hemodynamic characteristics of the left and right vertebral arteries (LVA, RVA) of six healthy volunteers were investigated for the supine (S) and the prone position (P) a common sleeping posture with ...

Conference Object
Effect of turbulent pulsating flow around a nearwall submerged cylinder on the potential motion of bed and suspended loads
(International Society of Offshore and Polar Engineers, 2016)In the present work, the pulsating flow around a submerged cylinder close to the impermeable seabed is examined by means of Large Eddy Simulations (LES). A Reynolds number equal to Re = 5000 is considered, based on the ...

Article
The Influence of CrackFace Normal and Shear Stress Loading on Hydraulic FractureTip Singular Plastic Fields
(2018)We investigated the singular plastic fields at the crack tip of a fracture that is loaded with normal and shear loads due to a viscous flow in a hydraulic fracturing. The level of the expected shear load in comparison with ...

Article
Mechanism for extrusion instabilities in polymer melts
(1999)A mechanism for explaining some of the instabilities observed during the extrusion of polymer melts is further explored. This is based on the combination of nonmonotonic slip and elasticity, which permits the existence ...

Article
On shear deformable beam theories: The frequency and normal mode equations of the homogeneous orthotropic bickford beam
(2001)This paper provides a step forwards the construction and documentation of the frequency equations and the characteristic functions of a general threedegreesoffreedom theory that describes the plane motion of shear ...

Article
On the stability of the simple shear flow of a JohnsonSegalman fluid
(1998)We solve the timedependent simple shear flow of a JohnsonSegalman fluid with added Newtonian viscosity. We focus on the case where the steadystate shear stress/shear rate curve is not monotonic. We show that, in addition ...

Article
A pversion MITC finite element method for ReissnerMindlin plates with curved boundaries
(2006)We consider the approximation of ReissnerMindlin plates with curved boundaries, using a pversion MITC finite element method. We describe in detail the formulation and implementation of the method, and emphasize the need ...

Conference Object
Rheology of semisolid suspensions
(Affiliation: Semisolid Processing Laboratory, Metal Processing Institute, WPI, Worcester, MA 01609, United StatesAffiliation: Polytech. University of Puerto Rico, Mechanical Engineering Department, San Juan 00918, Puerto RicoAffiliation: Institute for Problems in Mechanics, Russian Academy of Science, pr. Vemadskogo, 101, 117526 Moscow, Russian FederationCorrespondence Address: Alexandrou, A.N.Semisolid Processing Laboratory, Metal Processing Institute, WPI, Worcester, MA 01609, United States, 2000)The effective use of the semisolid process presumes a good theoretical framework to describe it. The understanding of semisolid behavior should be based upon a combination of basic and empirical knowledge in versatile ...

Article
Timedependent compressible extrudateswell problem with slip at the wall
(1994)We solve the timedependent compressible Newtonian extrudateswell problem with slip at the wall, in an attempt to simulate the stickslip extrusion instability. An arbitrary nonlinear slip model relating the shear stress ...

Article
Timedependent plane Poiseuille flow of a JohnsonSegalman fluid
(1999)We numerically solve the timedependent planar Poiseuille flow of a JohnsonSegalman fluid with added Newtonian viscosity. We consider the case where the shear stress/shear rate curve exhibits a maximum and a minimum at ...

Article
Viscoplastic flow development in tubes and channels with wall slip
(2016)The development of Bingham plastic flow in tubes and channels is investigated numerically using the Papanastasiou regularization and finite element simulations. It is assumed that slip occurs along the wall following ...