Bubbles in Nanofluids

Fan, Liang‐Shih; Hemminger, Orin; Yu, Zhao; Wang, Fei

doi:10.1021/ie061532c

Cited by 36 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The detachment of the CO 2 bubbles in pure methanol occurs at 68 ms while the detachment for SiO 2 and Al 2 O 3 nanofluid at 0.1 vol% occurs at 60 ms and 62 ms, respectively. The faster detachment induces a higher frequency rate which is consistent with the experimental work by Liang-Shih Fan et al (2007). The higher frequency yields a smaller bubble size which promotes the mass transfer to the liquid phase.…”

Section: Bubble Visualizationsupporting

confidence: 88%

CO2 absorption enhancement by methanol-based Al2O3 and SiO2 nanofluids in a tray column absorber

Pineda¹,

Lee²,

Jung³

et al. 2012

International Journal of Refrigeration

148

View full text Add to dashboard Cite

Section: Bubble Visualizationsupporting

confidence: 88%

CO2 absorption enhancement by methanol-based Al2O3 and SiO2 nanofluids in a tray column absorber

Pineda¹,

Lee²,

Jung³

et al. 2012

International Journal of Refrigeration

148

View full text Add to dashboard Cite

“…The promotion of coalescence was observed in the presence of hydrophobic as well as of hydrophilic particles . By contrast, large particles may lead to bubble breakage due to collisions . This results in an increase of the gas holdup.…”

Section: Three‐phase Systemsmentioning

confidence: 99%

Models for the Numerical Simulation of Bubble Columns: A Review

Mühlbauer

Hlawitschka

Bart

2019

Chemie Ingenieur Technik

View full text Add to dashboard Cite

This work reviews the state‐of‐the‐art models for the simulation of bubble columns and focuses on methods coupled with computational fluid dynamics (CFD) where the potential and deficits of the models are evaluated. Particular attention is paid to different approaches in multiphase fluid dynamics including the population balance to determine bubble size distributions and the modeling of turbulence where the authors refer to numerous published examples. Additional models for reactive systems are presented as well as a special chapter regarding the extension of the models for the simulation of bubble columns with a present solid particle phase, i.e., slurry bubble columns.

show abstract

“…An anomalous gas hold up in a bubble column with nanofluids has also been noticed. 13 To our knowledge, no hydrodynamic cavitation experiments with nanofluids have been reported up to now.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic cavitation in microsystems. I. Experiments with deionized water and nanofluids

et al. 2011

View full text Add to dashboard Cite

International audienceAn experimental study of hydrodynamic cavitation downstream microdiaphragms and microventuris is presented. Deionized water and nanofluids have been characterized within silicon-Pyrex micromachined devices with hydraulic diameters ranging from 51 μm to 104 μm. The input pressure could reach up to 10 bars, and the flow rate was below 1 liter per hour. The output pressure of the devices was fixed at values ranging from 0.3 bar to 2 bars, so that it was possible to study the evolution of the cavitation number as a function of the Reynolds number in the orifice of the diaphragms or in the throat of the venturis. A delay on the onset of cavitation has been recorded for all the devices when they are fed with deionized water, because of the metastability of the liquid and because of the lack of roughness of the walls. For the first time, hydrodynamic cavitation of nanofluids (nanoparticles dispersed into the liquid) has been considered. The presence of nano-aggregates in the liquid does not exhibit any noticeable effect on the cavitation threshold through the venturis. However, such a presence has a strong influence on the cavitation onset in microdiaphragms: above a critical volume solid concentration of ≈10−5, the metastability is broken and the nanofluids behave as tap water filled up with large nuclei. These microdevices, where a low amount of fluid is required to reach cavitating flows, appear to be useful tools in order to study cavitating phenomena in localized area with specific fluids

show abstract

Bubbles in Nanofluids

Cited by 36 publications

References 16 publications

CO2 absorption enhancement by methanol-based Al2O3 and SiO2 nanofluids in a tray column absorber

CO2 absorption enhancement by methanol-based Al2O3 and SiO2 nanofluids in a tray column absorber

Models for the Numerical Simulation of Bubble Columns: A Review

Hydrodynamic cavitation in microsystems. I. Experiments with deionized water and nanofluids

Contact Info

Product

Resources

About