A simple quantum mechanical model for the contribution of electronic surface states to surface stress, strength and electrocapillarity of solids

Gräfe, Wolfgang

doi:10.1007/s10853-012-6983-0

Cited by 9 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is the amount of surface free energy per unit area of the liquid droplet [3]. It has play an important role to find the shape of a liquid droplet which strongly influences the heat and mass transfer of a thermal system.Moreover, It has proved the critical impact on the boiling heat transfer [4], thermal performance of heat pipes [5],increasing critical heat flux (CHF) [6] and also influencing bubble or droplet formation [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticles Concentration and Their Sizes on Surface Tension of Nanofluids

Bhuiyan

Saidur

Afifi

et al. 2015

Procedia Engineering

153

View full text Add to dashboard Cite

Nanofluids", a colloidal mixture consisting of nano-sized particles dispersed in a fluid medium with amended thermo-physical properties play a critical role in the heat transfer performance of a thermal system. Surface tension is the surface energy per unit area or the force per unit length dominates the transportation of the liquid and shows a significant role in heat transfer. However, a few numbers of studies demonstrated about the effect of surface tension of nanofluids. Thus, the present experimental study investigates the effect of nanoparticles concentration as well as the influence of variation of nanoparticles along with their sizes. The nanofluids are prepared by dispersing Al 2 O 3 (13nm and 50 nm),TiO 2 (21nm) and SiO 2 (5~15nm and 10~20nm) nanoparticles in Distilled Water (DW).The traditional Du-Noüy ring method was used to measure the value of the surface tension of nanofluids by an automatic surface tensiometer (DCAT 11EC). The results show that the surface tension of the nanofluids increases with increase in concentration and nanoparticle sizes. Besides,TiO 2 -DW nanofluids exhibit higher surface tension than Al 2 O 3 -DW and SiO 2 -DW nanofluids respectively. All in all, the results indicate surface tension of the nanofluids enhances from 2.62 % to 4.82% in comparison with the base fluids for concentration variation of 0.05 Vol % to 0.25 Vol % at 25 °C.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticles Concentration and Their Sizes on Surface Tension of Nanofluids

Bhuiyan

Saidur

Afifi

et al. 2015

Procedia Engineering

153

View full text Add to dashboard Cite

show abstract

“…Condensation, boiling and two-phase flow can be affected by the surface tension of the fluid and this impacts the heat transfer performance of an energy system. Surface tension can be defined as the amount of surface free energy per unit area of the liquid droplet [83]. The liquid superheat required for the bubble's existence is directly proportional to the surface tension.…”

Section: ) Materials and Technologies For Sustainabilitymentioning

confidence: 99%

Thermophysical Properties and Heat Transfer Characteristics of Nanorefrigerants: Some Existing Results and Areas for Further Researches

Ogbonnaya

Ajayi

Waheed

et al. 2022

KEM

View full text Add to dashboard Cite

Refrigerants are commonly used as heat transfer fluid in refrigeration, heat pumps, and air conditioning systems. Nanorefrigerants are a special kind of nanofluid synthesized by dispersing nanoparticles into refrigerants or lubricant oil to improve its thermophysical and heat transfer characteristics. The optimization of the thermophysical properties of nanorefrigerant strongly depends on the successful synthesis procedures used for producing a stable suspension of nanoparticles in the refrigerants. In this study, a review was carried out to understand the synthesis of nanorefrigerant and the effect of nanoparticle size, type and concentration, temperature, base fluid type on the thermophysical properties of the nanorefrigerant. The effect of nanorefrigerant on the pressure drop and boiling heat transfer within the vapour compression refrigeration system (VCRS) was reviewed. From the review, the thermophysical properties of the nanorefrigerants affect the pressure drop and heat transfer characteristics of the vapour compression refrigeration system.

show abstract

Supplement to: a simple quantum mechanical model for the contribution of electronic surface states to surface stress, strength and electrocapillarity of solids

Gräfe¹

2013

J Mater Sci

View full text Add to dashboard Cite

A simple quantum mechanical model for the contribution of electronic surface states to surface stress, strength and electrocapillarity of solids

Cited by 9 publications

References 27 publications

Effect of Nanoparticles Concentration and Their Sizes on Surface Tension of Nanofluids

Effect of Nanoparticles Concentration and Their Sizes on Surface Tension of Nanofluids

Thermophysical Properties and Heat Transfer Characteristics of Nanorefrigerants: Some Existing Results and Areas for Further Researches

Supplement to: a simple quantum mechanical model for the contribution of electronic surface states to surface stress, strength and electrocapillarity of solids

Contact Info

Product

Resources

About