...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...

... index. 27 11 2009 04 10 2010 29 12 2010 29 12 2010 laminar flow non-Newtonian 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...

...) 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...

... of Technology, Rochester, New York. 26 06 2007 05 02 2008 29 07 2008 drag reduction friction pipe flow pipes polymer solutions rheology welan gum coiled tubing friction factor correlation guar gum drag reduction Welan gum is a commercially available biopolymer...

...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...

... 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...

... ( − 1805 + 5888 C 1 − 41472 C 1 2 + 27648 u ̃ max C 1 2 κ C 1 27648 C 1 2 κ C 1 ) 14 02 2006 08 11 2006 polymer solutions friction boundary layer turbulence channel flow drag reduction pipe flow laser velocimetry...

...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...

... 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...

... for degrading polymer solutions Behavior of the axial turbulent intensity component in degrading polymer solutions Behavior of the tangential turbulent intensity component in degrading polymer solutions. The measurement resolution decreases in time since the dimensionless size of the measuring...

.... 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...

... 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...

...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...

.... 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...

... 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...

...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...

... non-Newtonian flow rheology shear flow viscosity pipe flow stress effects bubbles hydrodynamics coatings polymer solutions As for gas penetration in a tube, there are early studies of the gas penetration through Newtonian fluids (e.g., 3 4 5 6 7 ). It was indicated that the relation...

... 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...