... fluids such as water. This phenomenon is referred to as a thermodynamic effect, as Stepanoff reported. The thermodynamic properties of the working fluid affect the sizes of the cavitation elements, which affect cavitation breakdown; therefore, experimental flow visualization is an effective approach...

... swell becomes apparent. With the estimated elastic stress proportional to squared mean velocity, a change in the elasticity of the water as it flows through a micro-orifice is strongly suggested. 25 07 2011 21 06 2012 27 07 2012 27 07 2012 micro-orifice water jet thrust...

... the diameters of the pipes making up the junction are small, it is of particular interest to nano multiphase flow technology (NMFT) currently being advocated. While there is a body of data for small diameter dividing junctions, it is almost exclusively for air-water where the pattern before flow and after...

... and water. The effect of the particles on the development of cavitation flows was modeled by using an additional phase particle dispersion model (Euler-Euler). Numerical modeling was performed using the CFD software. The impact on the cavity model with the parametric analysis of the entry conditions...

...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...

...Robert C. Bowden; Ibrahim G. Hassan Experiments were performed in a horizontal reduced T-junction using a branch diameter of 6.35 mm and an inlet pipe diameter of 50.8 mm. The inlet length was 1.8 m and three branch orientations were tested at 0, 45, and 90 degrees down from the horizontal. Water...

...Ali Benhmidene; Bechir Chaouachi; Mahmoud Bourouis; Slimane Gabsi In the present study, the ammonia-water mixing flow in a bubble pump is numerically simulated. The flow patterns of a two-phase flow in a bubble pump were studied under different conditions of heat flux and tube diameter. A one...

... effects and performing a full parametric study and a complete comparison with experiments and theory are new in this paper. The simulations are performed for two different liquids, water and ethylene glycol, where it is found that the jump is more stable and its location is less sensitive...

...Robert A. Leishear; Hector N. Guerrero; Michael L. Restivo; David J. Sherwood Mass transfer rates were measured in a large scale system, which is consisted of an 8.4 m tall by 0.76 m diameter column, containing one of the three fluids: water with an antifoam agent, water without an antifoam agent...

...E. Sansone; C. Pellone; T. Maitre The noncavitating and cavitating flows over a cross-flow water turbine are simulated by using an unsteady Navier–Stokes formulation. For the cavitating flow case, a homogeneous mixture with a varying density is considered and one additional transport equation...

...Afshin Goharzadeh; Peter Rodgers; Chokri Touati This paper presents an experimental study of three-phase flows (air-water-sand) inside a horizontal pipe. The results obtained aim to enhance the fundamental understanding of sand transportation due to saltation in the presence of a gas-liquid two...

...F. Sanchez-Silva; V. Hernandez-Perez; I. Carvajal-Mariscal; J. G. Barbosa-Saldaña; J. A. Cruz-Maya Novel experimental data for phase separation of air-water mixtures in horizontal 90 deg branched elbows are presented in this work. The branched elbows were formed by attaching a pipe to a 90 deg...

... different microchannel hydraulic diameters of 500 μ m , 200 μ m , and 100 μ m , all of which have cross-sectional aspect ratios of 1. The working fluid is distilled water, and velocity profile data are acquired over a laminar Reynolds number range from 0.5 to 200. The test-sections were designed...

...Duccio Bonaiuti; Mehrdad Zangeneh; Reima Aartojarvi; Jonas Eriksson The present paper describes the parametric design of a mixed-flow water-jet pump. The pump impeller and diffuser geometries were parameterized by means of an inverse design method, while CFD analyses were performed to assess...

...Jean-Pierre Franc; Guillaume Boitel; Michel Riondet; Éric Janson; Pierre Ramina; Claude Rebattet The thermodynamic effect on a cavitating inducer is investigated from joint experiments in cold water and Refrigerant 114. The analysis is focused on leading edge cavitation and cavitation instabilities...

... of the tip cavity length in liquid nitrogen ( 76 K and 80 K ) as working fluid with that in cold water ( 296 K ) allowed us to estimate the strength of the thermodynamic effect on the cavitations. The degree of thermodynamic effect was found to increase with an increase of the cavity length, particularly...

... the numerical simulation of the head drop induced by the development of cavitation in cold water was proposed and applied in the case of two four-bladed inducers and one centrifugal pump. Global results were compared to available experimental results. Internal flows in turbomachinery were investigated in depth...

...Peter Vassallo; Paul Symolon Friction factor data for adiabatic cross flow of water in a staggered tube array were obtained over a Reynolds number range (based on hydraulic diameter and gap velocity) of about 10,000–250,000. The tubes were 12.7 mm ( 0.5 in. ) outer diameter in a uniformly spaced...

..., and a stratified gas-liquid region, was experimentally investigated using air and water. A test section with a semicircular cross section and three discharging branches at 0 deg , 45 deg , and 90 deg was used. The critical height was recorded using both increasing and decreasing liquid level methods, thereby...

...K. Shahzad; B. A. Fleck; D. J. Wilson Jet-crossflow experiments were performed in a water channel to determine the Reynolds number effects on the plume trajectory and entrainment coefficient. The purpose was to establish a lower limit down to which small scale laboratory experiments are accurate...