Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Duct Flow of Polymer Solutions

Azuraien Jaafar, Azuraien (2009) Duct Flow of Polymer Solutions. PhD thesis, University of Liverpool.

[img]
Preview
PDF
Download (62Mb) | Preview

Abstract

The drag-reducing ability of a rigid "rod-like" polymer solution. scleroglucan. in a circular-pipe geometry together with the drag-reducing behaviour of a semi-rigid polymer, xanthan gum. in a concentric annular pipe have been investigated experimentally via pressure-drop measurements and using laser Doppler anemometry. The laminar and transitional flow in the annular pipe, with particular attention placed on the transitional regime, of two different polymers -a xanthan guns and a polymer known to exhibit a yield stress, carhopol - are also investigated in this work and compared to that ofa Nemonian fluid, a glycerine-water mixture. Complete nccological characterization ofthe diflerent polymer solutions investigated showed that sclerogluean. xanthan gum and carbopol, exhibited increased shear-thinning \w ith increasing Solution collcentratioll. Wall slip occurred in the carbopol solutions and was minimized using a roughened parallel-plate geometry I'or the steady-shear viscosity measurements producing a very high first Newtonian region at cry low shear stresses. typical ol'a "yiel(l stress- fluid. Capillary break-up extensional viscosity measurements conducted for scleroglucan and xanthan guns showed Nemonian-like linear filament-thinning behaviour mth a Trouton ratio (»)) confirnlin`g the non-Nemonian nature of these polymers in extensional flow. The drag-rccluctloll study tör scleroglucan was carried 0111 in a glass pipc-flom facility. A concentric annular-flow hicility (radius ratio A-=0.506) as utilized for the drab, -rccluction and transitional flow study of zanthan gum and carhopol. For all fluids. pressure-drop and detailed mean l1ow and turbulence characteristics were obtained at axial distances from the inlet sufficient for the Ncwonian and non-Newtonian flows to reach fully-developed conditions

Item Type: Thesis (PhD)
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Mechanical
Depositing User: Users 5 not found.
Date Deposited: 11 Jan 2012 12:18
Last Modified: 25 Jan 2017 09:44
URI: http://utpedia.utp.edu.my/id/eprint/515

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...