Splat-quench solidification of freely falling liquid-metal drops by impact on a planar substrate

Collings, E. W.; Markworth, Alan J.; McCoy, J. Kevin; Saunders, James H.

doi:10.1007/bf00575404

Cited by 110 publications

(52 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Laan et al (2014) showed that, even though the scaling with We 1/4 seems consistent for some liquids, such as water, it is not for other liquids, like blood. Based on energy conservation between kinetic and surface energy, a scaling of β max with We 1/2 is found (Collings et al 1990;Bechtel, Bogy & Talke 1993). However, Laan et al (2014) showed that none of their data scaled with the dependences reported in the literature (Re 1/4 , Re 1/5 , We 1/4 and We 1/2 ).…”

Section: Introductionmentioning

confidence: 72%

“…During impact, the spreading droplet deforms until it reaches its maximum diameter D max within a few milliseconds. The capillary energy can then be written as E γ ∼ γ D 2 max and the energy dissipated by viscous forces as E µ ∼ µV i D 5 max /D 3 0 (Madejski 1976;Collings et al 1990). In the capillary limit, we can assume that kinetic energy is transformed into capillary energy, E k ∼ E γ .…”

Section: Scaling Of the Maximum Spreading Diametermentioning

confidence: 99%

See 1 more Smart Citation

Universal rescaling of drop impact on smooth and rough surfaces

et al. 2015

View full text Add to dashboard Cite

The maximum spreading of drops impacting on smooth and rough surfaces is measured from low to high impact velocity for liquids with different surface tensions and viscosities. We demonstrate that dynamic wetting plays an important role in the spreading at low velocity, characterized by the dynamic contact angle at maximum spreading. In the energy balance, we account for the dynamic wettability by introducing the capillary energy at zero impact velocity, which relates to the spreading ratio at zero impact velocity. Correcting the measured spreading ratio by the spreading ratio at zero velocity, we find a correct scaling behaviour for low and high impact velocity and, by interpolation between the two, we find a universal scaling curve. The influence of the liquid as well as the nature and roughness of the surface are taken into account properly by rescaling with the spreading ratio at zero velocity, which, as demonstrated, is equivalent to accounting for the dynamic contact angle.

show abstract

Section: Introductionmentioning

confidence: 72%

Section: Scaling Of the Maximum Spreading Diametermentioning

confidence: 99%

Universal rescaling of drop impact on smooth and rough surfaces

et al. 2015

View full text Add to dashboard Cite

show abstract

“…[6] We have selected five models for comparison with our results. Firstly, a simple model that neglects the viscous dissipation and assumes that the droplet spreads into a cylindrical disk is derived from (1), based on the finding of Collings et al [42] :…”

Section: Comparing the Maximum Spreading Diametermentioning

confidence: 99%

“…For polymer solutions Equation (7) can be converted into the following: [42] Ukiwe [22] Pasandideh-Fard Bennet Park [44] where M n and C are the number averaged molar mass and the concentration of the polymer, respectively. [48] Equation (8) states that in order to maintain a constant vapor pressure the M n value is reciprocally related to its concentration.…”

Section: Printing Height Influence On the Droplet Spreading With Consmentioning

confidence: 99%

The Spreading of Inkjet‐Printed Droplets with Varying Polymer Molar Mass on a Dry Solid Substrate

Perelaer

Smith

Bosch

et al. 2009

Macro Chemistry & Physics

View full text Add to dashboard Cite

An experimental study on the spreading of inkjet printed droplets of a polystyrene/toluene solution with varied molar masses on solid dry surfaces is presented. The polymer's number‐averaged molar mass was varied between 1.5 and 545 kDa, which also caused a variation in the viscosity from 0.6 to 1.7 mPa · s. The results were compared with theoretical models for droplet spreading and were found to fit with an error between 2 and 20% with the predictions. Furthermore, the in‐flight evaporation of the free‐falling droplet was investigated for polystyrene/toluene solutions that have a constant vapor pressure by printing from a systematically increased height.

show abstract

“…The thermodynamic and kinetics of MG formation are related to controlling crystal nucleation and growth. [5] For Al-based MG formation, the required cooling rate is generally around 10 5 K/s, [1,4] and the possible rapid solidification processes to attain the required cooling rate include splat quenching, [6] twin-roller quenching, [7] melt spinning, [8] and gas atomization (GA). [9] Melt spinning and GA are most commonly used currently, [1] and melt spinning is popular for preparing specimens for scientific research because of easy process control.…”

Section: Introductionmentioning

confidence: 99%

Gas Atomization of Amorphous Aluminum: Part I. Thermal Behavior Calculations

Zheng

Lin

Zhou

et al. 2009

Metall Mater Trans B

View full text Add to dashboard Cite

In this article, the thermal history and cooling rate experienced by gas-atomized Al-based amorphous powders were studied via numerical simulations. Modeling simulations were based on the assumption of Newtonian cooling with forced convection, as well as an energy balance, which involves gas dynamics, droplet dynamics, and heat transfer between gas and droplet. To render the problem tractable, phase transformations, crystal nucleation, and growth were not taken into account in the analysis of the solidification of Al droplets; instead, an energy balance approach was formulated and used. The numerical results and associated analysis were used to optimize processing parameters during gas atomization of Al-based amorphous powder. The results showed that the cooling rate of droplets increases with decreasing powder size and can reach in excess of 10 5 K/s for powder <20 lm in diameter. Gas composition has a more significant influence on cooling rate than gas pressure, and 100 pct He has the highest cooling effect. The results also showed that the cooling rate increases with increasing melt superheat temperature.

show abstract

Splat-quench solidification of freely falling liquid-metal drops by impact on a planar substrate

Cited by 110 publications

References 10 publications

Universal rescaling of drop impact on smooth and rough surfaces

Universal rescaling of drop impact on smooth and rough surfaces

The Spreading of Inkjet‐Printed Droplets with Varying Polymer Molar Mass on a Dry Solid Substrate

Gas Atomization of Amorphous Aluminum: Part I. Thermal Behavior Calculations

Contact Info

Product

Resources

About