Effect of Temperature and Inlet Velocity on the Flow of a Nonnewtonian Fluid

Koh, Youngseo; Ong, N.S.; Chen, X.Y.; Lam, Yee Cheong; Chai, John C.

doi:10.1016/j.icheatmasstransfer.2004.05.010

Cited by 22 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Koh et al [7], using the generalized Newtonian approach in conjunction with the finite volume method, focused their attention on the effect of different viscosity descriptions on temperature and velocity distributions. Jambal et al [8], using the power law constitutive model, and Zdanski and Vaz Jr [9], based on the Cross equation, addressed the effects of the viscous dissipation and axial heat conduction of polymer melt flow in planar channels.…”

Section: Thermal Boundary Layer Development In Plane Channelsmentioning

confidence: 99%

A fully implicit finite difference scheme for velocity and temperature coupled solutions of polymer melt flow

Vaz

Zdanski

2006

Commun. Numer. Meth. Engng.

View full text Add to dashboard Cite

SUMMARYThis work presents a fully implicit finite difference scheme aimed at simulation of polymer melt flow in channels and mould cavities. This class of problems is characterized by strong material non-linearity and coupling of momentum, heat and mass transfer. The computational approach is based on the generalized Newtonian model and utilizes central discretization for both diffusive and convective terms, collocated meshes and artificial dissipation control to handle spurious pressure modes. The formulation accounts for the full interaction between the thermal effects caused by viscous heating and the momentum diffusion effects dictated by a shear rate and temperature-dependent constitutive model. Solutions for plane channels and asymmetric sudden expansion illustrate application to polymer melt flow.

show abstract

Section: Thermal Boundary Layer Development In Plane Channelsmentioning

confidence: 99%

A fully implicit finite difference scheme for velocity and temperature coupled solutions of polymer melt flow

Vaz

Zdanski

2006

Commun. Numer. Meth. Engng.

View full text Add to dashboard Cite

show abstract

“…The hydrodynamic and thermal problems are coupled and the flow solutions exhibit strong nonlinearity, especially through a shear-rate and temperature dependent viscosity. The recent literature [13][14][15] reflects the ongoing interest of the scientific community in further understanding the physics of such problems. The present paper is particularly concerned with the effect of the inlet velocity upon the development of the thermal and hydrodynamic boundary layers.…”

Section: The Flow Entrance Regionmentioning

confidence: 99%

Polymer melt flow in plane channels: Hydrodynamic and thermal boundary layers

Zdanski¹,

Vaz²

2006

Journal of Materials Processing Technology

View full text Add to dashboard Cite

“…Thus, the Navier-Stokes equation fails to describe the behaviors of these biofluids, and the more general Cauchy momentum equation with a proper constitutive equation must be used instead. A number of constitutive equations have been established to relate the dynamic viscosity of non-Newtonian fluids to the shear rate, such as the power-law model, 4 Carreau model, 5 Moldflow first-order model, 6 and Bingham model. 7 Electrokinetic phenomena involving non-Newtonian fluids were already shown to behave differently from their Newtonian counterparts.…”

Section: Introductionmentioning

confidence: 99%

Electro-osmotic mobility of non-Newtonian fluids

Zhao

Yang

2011

Biomicrofluidics

View full text Add to dashboard Cite

Electrokinetically driven microfluidic devices are usually used to analyze and process biofluids which can be classified as non-Newtonian fluids. Conventional electrokinetic theories resulting from Newtonian hydrodynamics then fail to describe the behaviors of these fluids. In this study, a theoretical analysis of electro-osmotic mobility of non-Newtonian fluids is reported. The general Cauchy momentum equation is simplified by incorporation of the Gouy-Chapman solution to the Poisson-Boltzmann equation and the Carreau fluid constitutive model. Then a nonlinear ordinary differential equation governing the electro-osmotic velocity of Carreau fluids is obtained and solved numerically. The effects of the Weissenberg number ͑Wi͒, the surface zeta potential ͑ s ͒, the power-law exponent ͑n͒, and the transitional parameter ͑␤͒ on electro-osmotic mobility are examined. It is shown that the results presented in this study for the electro-osmotic mobility of Carreau fluids are quite general so that the electro-osmotic mobility for the Newtonian fluids and the power-law fluids can be obtained as two limiting cases.

show abstract

Effect of Temperature and Inlet Velocity on the Flow of a Nonnewtonian Fluid

Cited by 22 publications

References 0 publications

A fully implicit finite difference scheme for velocity and temperature coupled solutions of polymer melt flow

A fully implicit finite difference scheme for velocity and temperature coupled solutions of polymer melt flow

Polymer melt flow in plane channels: Hydrodynamic and thermal boundary layers

Electro-osmotic mobility of non-Newtonian fluids

Contact Info

Product

Resources

About