Results 31 to 40 of about 3,583,136 (389)

Direct numerical simulations of mass transfer in square microchannels for liquid-liquid slug flow [PDF]

open access: yes, 2008
Microreactors for the development of liquid-liquid processes are promising technologies since they are supposed to offer an enhancement of mass transfer compared to conventional devices due to the increase of the surface/volume ratio.
Cognet, Patrick   +3 more
core   +1 more source

Dynamic control of current and voltage waveforms and droplet transfer for ultrasonic-wave-assisted underwater wet welding

open access: yesMaterials & Design, 2019
Ultrasonic vibration can change the dynamic behavior of the bubble and improve the process stability in underwater wet welding (UWW); thus, it has been attempted to profitably control metal transfer process.
Jianfeng Wang   +5 more
doaj   +1 more source

Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel

open access: yesMetals, 2023
In fields, such as oil and gas pipelines and nuclear power, narrow-gap welding has often been used for the connection of thick and medium-thick plates.
Hongsheng Liu   +4 more
doaj   +1 more source

Numerical Simulation of Single-Droplet Dynamics, Vaporization, and Heat Transfer from Impingement onto Static and Vibrating Surfaces

open access: yesFluids, 2020
A numerical study is presented to examine the behavior of a single liquid droplet initially passing through air or steam, followed by impingement onto a static or vibrating surface. The fluid dynamic equations are solved using the Volume of Fluid method,
J. Thalackottore Jose, J. F. Dunne
doaj   +1 more source

Study on Flight Dynamics and Heat Transfer Solidification of Metal Droplets during Centrifugal Spray Deposition Forming Process

open access: yesMetals, 2023
Centrifugal spray deposition forming technology, which is used in the preparation process of near-net-forming billets, not only reduces the macroscopic segregation and refines the microstructures of billets but also has the characteristics of a rapid ...
Peng Li   +4 more
doaj   +1 more source

Single Organic Droplet Collision Voltammogram via Electron Transfer Coupled Ion Transfer [PDF]

open access: yesAnalytical Chemistry, 2017
Single-emulsion toluene oil droplets (femtoliter) containing a hydrophobic redox probe that are dispersed in water stochastically collide with an ultramicroelectrode (UME). The fast-scan cyclic voltammetry (FSCV) or Fourier-transformed sinusoidal voltammetry (FTSV) is applied: the UME was scanned with a fast, repetitive triangular, or sinusoidal ...
Cheng Liu   +5 more
openaire   +2 more sources

Spartin-mediated lipid transfer facilitates lipid droplet turnover

open access: yesProceedings of the National Academy of Sciences, 2023
AbstractLipid droplets (LDs) are organelles critical for energy storage and membrane lipid homeostasis, whose number and size are carefully regulated in response to cellular conditions. The molecular mechanisms underlying lipid droplet biogenesis and degradation, however, are not well understood.
Neng Wan   +6 more
openaire   +3 more sources

Analysis of Controlled Driving and Spreading Behavior of Molten Pool in Cold Metal Transfer

open access: yesEnergies, 2022
The controlled short-circuit transfer is used to control the heat input of the molten pool and the base metal in the cold metal transfer welding process, including droplet formation, droplet transfer and molten pool flow.
An Zhang   +4 more
doaj   +1 more source

Droplet Transfer in Two Phase Annular Mist Flow : Part 2, Prediction of Droplet Transfer Rate

open access: yesTransactions of the Japan Society of Mechanical Engineers, 1972
The liquid droplet transfer onto the duct wall was studied experimentally in the previous paper, part 1. In the present paper, a method for predicting the droplet transfer rate is proposed. The droplet transfer coefficient is expressed theoretically in terms of the duct height, the eddy diffusivity and scale of turbulent motion of droplet based on an ...
Sadahiro NAMIE, Tatsuhiro UEDA
openaire   +3 more sources

Numerical investigation of local heat transfer characteristics of an oblique droplet impacting a wetted wall

open access: yesCase Studies in Thermal Engineering, 2019
In this study, the flow dynamics and heat transfer process of a single droplet obliquely impacting a wall covered by a thin liquid film are investigated numerically based on the volume of fluid method, with the impact angle ranging from 0° to 45°.
Qi Yang   +4 more
doaj   +1 more source

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