## Search

Now showing items 11-20 of 55

#### Using transient shear rheology to determine material parameters in fiber suspension theory

(AIP Publishing, 2009-05-01)

Fiber suspension theory model parameters for use in the simulation of fiber orientation in complex flows are, in general, either calculated from theory or fit to experimentally determined fiber orientation generated in ...

#### Obtaining reliable transient rheological data on concentrated short fiber suspensions using a rotational rheometer

(AIP Publishing, 2009-09-01)

The conventional method for obtaining transient rheological data on short glass fiber-filled polymeric fluids is to use the parallel disk (PP) geometry in a rotational rheometer. Using the PP geometry large transient stress ...

#### effect of upstream boundary conditions on stability of fiber spinning in the highly elastic limit

(AIP Publishing, 2002-07)

We consider fiber spinning for the upper-convected Maxwell fluid in the limit of a high Deborah number. We compare several choices of boundary conditions that may be imposed. In addition to the takeup speed and the upstream ...

#### Field-induced motion of ferrofluid droplets through immiscible viscous media

(Cambridge University Press, 2008-09)

The motion of a hydrophobic ferrofluid droplet placed in a viscous medium and driven by an externally applied magnetic field is investigated numerically in an axisymmetric geometry. Initially, the drop is spherical and ...

#### Numerical simulation of breakup of a viscous drop in simple shear flow through a volume-of-fluid method

(American Institute of Physics, 2000-02)

A spherical drop, placed in a second liquid of the same density, is subjected to shearing between parallel plates. The subsequent flow is investigated numerically with a volume-of-fluid (VOF) method. The scheme incorporates ...

#### Pyramidal and toroidal water drops after impact on a solid surface

(Cambridge University Press, 2003-06)

Superhydrophobic surfaces generate very high contact angles as a result of their microstructure. The impact of a water drop on such a surface shows unusual features, such as total rebound at low impact speed. We report ...

#### Prediction of rheometrical and complex flows of entangled linear polymers using the double-convection reptation model with chain stretch

(AIP Publishing, 2003-01)

We study the rheometrical and complex flow response of the double-convection-reptation (DCR) model with chain stretch proposed recently by Ianniruberto and Marrucci (2002) for entangled linear polymers. The single- and ...

#### Sufficient conditions and perfect duality in nonconvex minimization with inequality constraints

(American Institute of Mathematical Sciences, 2005-02)

The paper studies forced surface waves on an incompressible, inviscid fluid in a two-dimensional channel with a small negative or oscillatory bump on a rigid flat bottom. Such wave motions are determined by a non-dimensional ...

#### Global extremal conditions for multi-integer quadratic programming

(American Institute of Mathematical Sciences, 2008-05)

Support vector machine (SVM) is a very popular method for binary data classification in data mining ( machine learning). Since the objective function of the unconstrained SVM model is a non-smooth function, a lot of good ...

#### Canonical dual approach to solving 0-1 quadratic programming problems

(American Institute of Mathematical Sciences, 2008-02)

This paper presents a canonical duality theory for solving nonconvex polynomial programming problems subjected to box constraints. It is proved that under certain conditions, the constrained nonconvex problems can be ...