Encyclopedia of Fluid Mechanics (Gas-Liquid Flows, Vol. 3)

Cheremisinoff, Nicholas P.; Orozco, J.

doi:10.1115/1.3265610

Cited by 11 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corresponding slopes and R 2 -factors are given in Table 1. For µm-sized particles, the equation is known for the concentration dependence of density in the two-phase mixtures [6]. Pak and Cho [7] implemented the same equation for nano-sized particles, which is expressed as ρ nf l = φρ p + (1 − φ) ρ f l , where ρ nf l , ρ p , ρ f l are densities of the two-phase mixture, particles, and pure fluid, respectively, and φ is the particle volume fraction.…”

Section: Resultsmentioning

confidence: 99%

Nanodiamond aqueous dispersions as potential nanofluids: the determination of properties by thermal lensing and other techniques

Usoltseva¹,

Volkov²,

Авраменко³

et al. 2018

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

Thermal-lens spectrometry was used to characterize thermal diffusivity and thermal conductivity of aqueous nanodiamond dispersions at the level of mg/mL, accompanied by heat capacity, density, and viscosity measurements and modelling. The data from thermal lensing corresponding to thermal equilibrium show 3 -7 % increase in thermal conductivity of the studied dispersions, show good precision and agree with the existing data.

show abstract

Section: Resultsmentioning

confidence: 99%

Nanodiamond aqueous dispersions as potential nanofluids: the determination of properties by thermal lensing and other techniques

Usoltseva¹,

Volkov²,

Авраменко³

et al. 2018

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

show abstract

“…An increased gradient indicates an increase in the frictional factor and can be explained by the fact that when gas is introduced and the flow becomes two-phase we have an increase in the turbulence level (1) . Forces such as the friction between the flow and the pipe surface, interaction between bubbles and liquid gravitational and acceleration forces must be considered.…”

Section: Pressure Distributionmentioning

confidence: 99%

“…Many studies concerning phase change and the flow regime characteristics of twophase flow through straight pipes have been conducted and a great deal of knowledge has been gathered (1) - (4) . However, few studies have focused on two-phase flow characteristics in a vertical upward sudden contraction pipe and a few are mentioned in the bibliography (2), (8), (9) .…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics and Control of Vertical Upward Gas-Liquid Two-Phase Flow through a Sudden Contraction Pipe

Voutsinas

Shakouchi

Takamura

et al. 2006

JSME international journal. Ser. B, Fluids and thermal engineer

View full text Add to dashboard Cite

The flow characteristics of upward gas-liquid two-phase flow through a vertical sudden contraction pipe is an area that has been less studied experimentally and numerically and that is still little known(1) -(3) . The drag and its reduction for an upward bubbly two-phase flow in a sudden contraction pipe are investigated. Vortices are generated just prior to and after contraction and they significantly affect the flow characteristics. A simple and economical method to control and smoothen the flow is proposed by mounting a small obstacle (ring) upstream the contraction. The effects of ring position, Reynolds number and volumetric gas flow rate are examined and positive results were seen in all flow conditions. Moreover, the pressure fluctuation phenomenon and its control downstream the contraction was considered.

show abstract

“…It also requires an equivalent pipe length Le that depends on the elbow radius to the pipe diameter ratio (r/D), as well as the angle of the elbow bend [23]. The increment of Le as a function of r/D is mainly due to friction, centrifugal force, and the secondary flow that is present in the elbows.…”

Section: Chisholm Modelmentioning

confidence: 99%

CFD Analysis of the Effect of Elbow Radius on Pressure Drop in Multiphase Flow

Mazumder

2012

Modelling and Simulation in Engineering

View full text Add to dashboard Cite

Computational fluid dynamics (CFD) analysis was performed in four different 90 degree elbows with air-water two-phase flows. The inside diameters of the elbows were 6.35 mm and 12.7 mm with radius to diameter ratios (r/D) of 1.5 to 3. The pressure drops at two different upstream and downstream locations were investigated using empirical, experimental, and computational methods. The combination of three different air velocities, ranging from 15.24 to 45.72 m/sec, and nine different water velocities, in the range of 0.1-10.0 m/s, was used in this study. CFD analysis was performed using the mixture model and a commercial code, FLUENT. The comparison of CFD predictions with experimental data and empirical model outputs showed good agreement.

show abstract

Encyclopedia of Fluid Mechanics (Gas-Liquid Flows, Vol. 3)

Cited by 11 publications

References 0 publications

Nanodiamond aqueous dispersions as potential nanofluids: the determination of properties by thermal lensing and other techniques

Nanodiamond aqueous dispersions as potential nanofluids: the determination of properties by thermal lensing and other techniques

Flow Characteristics and Control of Vertical Upward Gas-Liquid Two-Phase Flow through a Sudden Contraction Pipe

CFD Analysis of the Effect of Elbow Radius on Pressure Drop in Multiphase Flow

Contact Info

Product

Resources

About