Results 31 to 40 of about 70,881 (202)

Investigation on the Metal Transfer and Cavity Evolution during Submerged Arc Welding with X-ray Imaging Technology

open access: yesMetals, 2023
The physical phenomena of submerged arc welding (SAW) conducted with a 1.6 mm flux-cored wire were investigated using X-ray imaging technique. Three kinds of metal transfer modes were confirmed in this paper, namely the front flux wall-guided droplet ...
Yanfei Han   +5 more
doaj   +1 more source

Application Study of Edge Detection for Droplet in Laser Enhanced GMAW Welding

open access: yesAdvances in Mechanical Engineering, 2014
Ambient pressure has a certain inhibiting effect on underwater welding droplet transfer and the stability of welding process. Good droplet transfer of underwater welding plays an important role in improving repairing quality of underwater structures.
Zhu Jialei, Jiao Xiangdong, Qiao Xi
doaj   +1 more source

Direct contact condensation heat transfer characteristics of vapor with noncondensable gases in horizontal tubes

open access: yesCase Studies in Thermal Engineering, 2023
Direct contact heat transfer characteristics of vapor condensation with noncondensable gases in horizontal tubes are studied in this paper. A three-dimensional computational model is proposed and effects of cross-flow and droplet particles interactions ...
Yongcheng Zhao   +4 more
doaj   +1 more source

Probing the Evaporation Dynamics of Ethanol/Gasoline Biofuel Blends Using Single Droplet Manipulation Techniques [PDF]

open access: yes, 2015
Using blends of bio-ethanol and gasoline as automotive fuel leads to a net decrease in the production of harmful emission compared to the use of pure fossil fuel. However, fuel droplet evaporation dynamics change depending on the mixing ratio.
Reid, Jonathan P.   +7 more
core   +1 more source

Internal mass and heat transfer between a single deformable droplet and simple extensional creeping flow

open access: yes, 2018
This work studied numerically the internal mass/heat transfer of a deformable droplet immersed in a simple extensional flow. The droplet would deform gradually from prolate spheroid to 'peanut' in uniaxial extensional flow, or from oblate spheriod to ...
Liu, Anjun   +4 more
core   +2 more sources

A Comprehensive Study of Dynamic and Heat Transfer Characteristics of Droplet Impact on Micro-Scale Rectangular Grooved Surface

open access: yesEnergies, 2018
Micro-scale structure of impact surface has a significant effect on the droplet impact. In this study, a three-dimensional numerical model of the droplet impact on micro-scale rectangular grooved surface was established based on coupled level set and ...
Zhe Yan, Yan Li
doaj   +1 more source

Heat Transfer by Sweat Droplet Evaporation

open access: yesEnvironmental Science & Technology
Sweating regulates the body temperature in extreme environments or during exercise. Here, we investigate the evaporative heat transfer of a sweat droplet at the microscale to unveil how the evaporation complexity of a sweat droplet would affect the body's ability to cool under specific environmental conditions.
Mohadese Beigtan   +2 more
openaire   +2 more sources

The strong influence of substrate conductivity on droplet evaporation

open access: yes, 2009
We report the results of physical experiments that demonstrate the strong influence of the thermal conductivity of the substrate on the evaporation of a pinned droplet.
Dunn, Gavin   +4 more
core   +1 more source

SARS-CoV-2 virus transfers to skin through contact with contaminated solids

open access: yesScientific Reports, 2021
Transfer of SARS-CoV-2 from solids to fingers is one step in infection via contaminated solids, and the possibility of infection from this route has driven calls for increased frequency of handwashing during the COVID-19 pandemic.
Saeed Behzadinasab   +4 more
doaj   +1 more source

On the lifetimes of evaporating droplets [PDF]

open access: yes, 2014
The complete description of the lifetime of a droplet on a solid substrate evaporating in a 'stick–slide' mode is obtained. The unexpectedly subtle relationship between the lifetime of such a droplet and the lifetimes of initially identical droplets ...
Wilson, Stephen   +6 more
core   +1 more source

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