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Keywords: polymer solutions
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Journal Articles
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111301.
Published Online: October 27, 2011
...Natasha Chang; Harish Ganesh; Ryo Yakushiji; Steven L Ceccio Injection of water and aqueous polymer solutions in to the core of a trailing vortex was found to delay the inception of tip vortex cavitation (TVC). Optimal levels of mass injection reduced the inception cavitation number from 3.5 to 1.9...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2010, 132(12): 121204.
Published Online: December 29, 2010
... flow polymer solutions virtual mass coefficient two spheres power law fluid The accelerating motion of falling spheres in Newtonian fluids and non-Newtonian fluids is relevant to many practical situations in civil engineering, such as sewage treatment, and in environmental engineering...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. January 2009, 131(1): 011201.
Published Online: November 26, 2008
...) asymptote in coiled tubing is developed. When the curvature ratio is set to zero, the new correlation reduces to the well-known Virk’s MDR asymptote for dilute polymer solutions in straight pipes. A new drag reduction envelope is proposed for the analysis of drag reduction behavior of polymeric fluids...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. August 2008, 130(8): 081506.
Published Online: July 29, 2008
... is usually evaluated against 4.9 kg ∕ m 3 as a benchmark. Therefore, in the following, the performance of welan gum fluids is compared with 4.9 kg ∕ m 3 guar fluid. The flow of welan gum polymer solutions in straight tubing exhibits extended laminar flow for much higher...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. August 2008, 130(8): 081503.
Published Online: July 24, 2008
...Takatsune Narumi; Jun Fukada; Satoru Kiryu; Shinji Toga; Tomiichi Hasegawa An experimental study has been conducted on unstable structures induced in two-dimensional slit flows of liquid crystalline polymer solution. 50 wt % aqueous solution of hydroxyl-propylcellulose (HPC) was utilized as a test...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. June 2008, 130(6): 061303.
Published Online: May 22, 2008
... with an increase in polymer concentration, plus an increase with an increase in polymer molecular weight for most cases. However, no significant change in D 32 was observed for polymer solutions whose molecular weights ranged from 12,000 to 35,000, suggesting the presence of a critical molecular weight below which...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. April 2007, 129(4): 491–505.
Published Online: November 8, 2006
... at the same friction velocity. Next, the results are compared in order to characterize the effect of the additive on the turbulent flow. 14 02 2006 08 11 2006 polymer solutions friction boundary layer turbulence channel flow drag reduction pipe flow laser velocimetry...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. July 2006, 128(4): 856–863.
Published Online: December 6, 2005
...Flávia Zinani; Sérgio Frey The flow of viscoplastic liquids is studied via a finite element stabilized method. Fluids, such as some food products, blood, mud, and polymer solutions, exhibit viscoplastic behavior. In order to approximate this class of liquids, a mechanical model, based...
Journal Articles
Article Type: Special Section On The Fluid Mechanics And Rheology Of Nonlinear Materials At The Macro, Micro And Nano Scale
J. Fluids Eng. January 2006, 128(1): 88–94.
Published Online: October 4, 2005
... 2005 polymer solutions discs (structures) swirling flow non-Newtonian flow confined flow flow visualisation rotational flow viscosity viscoelastic fluid rotating disk flow visualization LDV power-law model Giesekus model The confined swirling flows of viscoelastic...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. January 2006, 128(1): 118–130.
Published Online: August 2, 2005
... on these are in very good agreement with available experimental data. 09 04 2004 02 08 2005 polymer solutions drag reduction boundary layer turbulence rotational flow flow simulation non-Newtonian flow pipe flow laser Doppler anemometry statistical analysis Turbulent drag reduction...
Journal Articles
Article Type: Special Section On The Fluid Mechanics And Rheology Of Nonlinear Materials At The Macro, Micro And Nano Scale
J. Fluids Eng. January 2006, 128(1): 95–100.
Published Online: July 13, 2005
.... In addition, the critical Reynolds number of the polymer solutions increased, where Taylor vortices occur, because the generation of the Görtler vortices was retarded. In high concentration polymer solutions, this effect became remarkable. Measurements of steady-state Taylor cells showed that the upper...
Journal Articles
Article Type: Special Section On The Fluid Mechanics And Rheology Of Nonlinear Materials At The Macro, Micro And Nano Scale
J. Fluids Eng. January 2006, 128(1): 55–61.
Published Online: May 26, 2005
... of z . A very good initial guess is computed using piecewise function approximations. The fluid we consider is a concentrated polymer solution, specifically a 5% polyisobutylene (PIB) solution in tetradecane (C14) at 25 ° C , described by Quinzani et al. ( 10 11 ). The relaxation...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. May 2005, 127(3): 536–549.
Published Online: March 16, 2005
...R. Sun Chee Fore; J. Szwalek; A. I. Sirviente The understanding of drag reduction by injection of polymer solutions requires an adequate and accurate polymer solution preparation process as well as a thorough understanding of the effects that the delivery system might have on the polymer flow. Mass...
Journal Articles
Article Type: Article
J. Fluids Eng. November 2004, 126(6): 1054–1057.
Published Online: March 11, 2005
.... 13 January 2003 27 July 2004 11 03 2005 polymer solutions channel flow surfactants turbulence drag reduction velocimeters Drag reduction in turbulent flow, by low concentrations of polymers, is well known since the publication on the phenomenon by Toms 1 . Recently...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. September 2004, 126(5): 724–729.
Published Online: December 7, 2004
... understand the role of polymer in the delay of tip vortex cavitation, a theoretical analysis of tip vortex cavitation inception in pure water and in polymer solution is presented. The analysis shows that while polymer injection causes instability in small bubbles, its main effect is an increase in tip vortex...
Journal Articles
Article Type: Guest Editorial
J. Fluids Eng. March 2004, 126(2): 145–147.
Published Online: May 3, 2004
...Dennis A. Siginer 03 05 2004 rheology fluid mechanics non-Newtonian flow bubbles viscosity viscoelasticity polymer solutions liquid crystals jets pipe flow metallurgy convection crystal growth from solution transfer moulding magnetic fluids solidification...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. March 2004, 126(2): 148–152.
Published Online: May 3, 2004
... study of viscous fingering 16 . On the other hand, Linder et al. 15 concluded that the influence of elongational viscosity was insignificant. However, the measurement of elongational viscosity of polymer solutions is still a challenging problem and quantitative evaluation of elongational effects...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. September 2000, 122(3): 626–633.
Published Online: May 9, 2000
... in pressure measurements include hole-pressure effects, instabilities in cavity flow, and the time lag of the disturbance wave. We consider static and dynamic flow systems of a polymer solution (PIB/C14/PB Boger fluid) to study these problems and show that instantaneous pressure measurements in these systems...