Fen ve matematik entegrasyonu öğrencileri motive etmekte, tutumlarını geliştirme başarıları ile kavramsal anlamalarını arttırmaktadır. Bu çalışmanın amacı destekli yoğunluk konusu öğretiminin altıncı sınıf öğrencilerinin fen tutumları konusuna ilişkin başarı muhakeme seviyeleri üzerindeki etkisini incelemektir. Çalışma kontrol gruplu öntest-sontest deneysel desen kullanılarak tasarlanmıştır. Ça...

We develop a numerical scheme for the flow of viscoelastic fluids, including OldroydB and FENE-CR constitutive models. The space discretization is staggered, using either Marker-And-Cell (MAC) structured nonuniform grids, or Rannacher Turek (RT) nonconforming low-order finite element approximation general quandrangular hexahedral meshes. time uses fractional-step algorithm where solution Navier...

The turbulence of a realistic dilute solution DNA macromolecules is investigated through hybrid Eulerian–Lagrangian approach that directly solves the incompressible Navier–Stokes equation alongside evolution 108 polymers, modelled as finitely extensible nonlinear elastic (FENE) dumbbells. At friction Reynolds number 320 and Weissenberg 2×104, drag reduction equal to 26%, which similar one obtai...

The simulation of flows of viscoelastic fluids is a very challenging domain from the theoretical as well as the numerical modelling point of view. In particular, all the existing methods have failed to solve the high Weissenberg number problem (HWNP). It is therefore clear that new tools are necessary. In this thesis we propose to tackle the problem of the simulation of viscoelastic fluids pres...

We construct a Galerkin finite element method for the numerical approximation of weak solutions to a coupled microscopic-macroscopic bead-spring model that arises from the kinetic theory of dilute solutions of polymeric liquids with noninteracting polymer chains. The model consists of the unsteady incompressible Navier–Stokes equations in a bounded domain Ω ⊂ R, d = 2 or 3, for the velocity and...

Owing to nonlinear viscoelasticity, materials often show characteristic features that resemble those of thixotropy. This issue has been debated in the literature over past several decades, and experimental protocols have proposed distinguish thixotropy from viscoelasticity. In this work, we assess these by carrying out experiments using polymer solutions, thixotropic clay dispersions, modeling ...