scholarly journals Self-propelled Leidenfrost droplets on a heated glycerol pool

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryo Matsumoto ◽  
Koji Hasegawa
Keyword(s):  
Experimental Investigation ◽  
Simple Model ◽  
Quantitative Agreement ◽  
The Self ◽  
Pool Surface ◽  
Free Sample ◽  
Solid Substrates ◽  
Liquid Pools ◽  
Significant Attention ◽  
Vapour Film

AbstractThe development of contactless sample manipulation for microfluidic purposes has attracted significant attention within the physicochemical fields. Most existing studies focus on the interactions of unheated liquid substrates and on heated/unheated solid substrates. Therefore, the dynamics of droplets on heated liquid pools have yet to be explored. Here, we present an experimental investigation on the levitated and self-propelled droplets on a heated pool. We aim to identify the effect of the pool temperature and the thermophysical properties of droplets on the dynamics of a self-propelled Leidenfrost droplet on a heated pool. The motion of droplets after levitation on the heated pool is visualized. To elucidate the self-propulsion of Leidenfrost droplets, we quantify the thickness of the vapour film between the approaching droplet and the pool surface. Our experimental results show a quantitative agreement with the simple model prediction for self-propelled Leidenfrost droplets. Our results provide deeper physical insights into the dynamics of Leidenfrost droplets on a heated pool for contactless and contamination-free sample manipulation.

An Experimental Study of the Interaction of Multiple Liquid Pool Fires

1995 ◽  
Vol 117 (1) ◽  
pp. 37-42 ◽  
Author(s):  
J. R. Vincent ◽  
S. R. Gollahalli
Keyword(s):  
Carbon Dioxide ◽  
Large Fraction ◽  
Liquid Pool ◽  
Flame Height ◽  
Design Parameters ◽  
Pool Fires ◽  
Pool Surface ◽  
Flammable Liquids ◽  
Liquid Pools ◽  
Ignition And Combustion

The risk of accidental spills and possible fires is high in the storage and handling of large quantities of flammable liquids. Such liquid pool fires are generally buoyancy-driven and emit a large fraction of their heat release in the form of radiation. Ignition and combustion characteristics of liquid pools depend on the design parameters such as diameter, spacing, and shape of the pools. This laboratory scale study was conducted to determine the effects of these parameters on the characteristics of multiple liquid pool fires. The measurements reported include pool surface regression rate, flame height, temperature, and concentrations of carbon dioxide, soot, and oxygen.

Experimental Investigation of the Self-Propelled Motion of a Sodium Oleate Tablet and Boat at an Oil–Water Interface

Langmuir ◽  
2018 ◽  
Vol 34 (19) ◽  
pp. 5487-5494 ◽  
Author(s):  
Yasuhito Watahiki ◽  
Tomonori Nomoto ◽  
Luca Chiari ◽  
Taro Toyota ◽  
Masanori Fujinami
Keyword(s):  
Experimental Investigation ◽  
Sodium Oleate ◽  
The Self ◽  
Water Interface ◽  
Oil Water

scholarly journals Interference Phenomena in Deformed Single Crystals of Ice

1971 ◽  
Vol 10 (59) ◽  
pp. 269-286 ◽  
Author(s):  
G. J. Readings ◽  
J. T. Bartlett
Keyword(s):  
Optical Properties ◽  
Simple Model ◽  
Single Crystals ◽  
Uniaxial Compression ◽  
Basal Plane ◽  
Quantitative Agreement ◽  
Optic Axis ◽  
Interference Fringes ◽  
Alternative Hypotheses ◽  
Active Contribution

AbstractWhen rectangular single crystals of ice were subjected to uniaxial compression parallel to their Long axes and viewed between crossed polarizers, interference fringes were often observed. Some of these interference bands were associated with grain boundaries formed as a result of “kinking”. These can be explained in terms of the known anisotropic optical properties of ice and the change in the orientation of the optic axis across the boundary. This case has been analysed in detail with the aid of Jones’ calculus and good quantitative agreement exists between the theory and the experimental observations.Other interference bands were observed parallel to the trace of the basal plane on the surface of some deformed crystals. Alternative hypotheses for the explanation of this phenomenon have been considered and it seems probable that these bands are a result of slight random misorientations between adjacent slip lamellae. Applying Jones’ calculus to a simple model of such a deformed crystal indicates that the required misorientations are of the order of 1º If this explanation is correct, it implies that dislocations with non-basal Burgers vectors (probablyc[0001]) make an active contribution to the deformation.

An Experimental Investigation of the Effects of Clamped Length and Loading Direction on Self-Loosening of Bolted Joints

2004 ◽  
Author(s):  
Ming Zhang ◽  
Yanyao Jiang ◽  
Chu-Hwa Lee
Keyword(s):  
Experimental Investigation ◽  
Fatigue Curve ◽  
Relative Displacement ◽  
The Self ◽  
Bolted Joints ◽  
Transverse Load ◽  
External Loading ◽  
Loading Direction ◽  
Controlling Parameter ◽  
Load Carrying

An experimental investigation was conducted to study the effects of clamped length and loading direction on the self-loosening behavior of bolted joints. Specially designed fixtures were used for the study. The experiments mimicked two plates jointed by an M12×1.75 Class 10.9 bolt and a nut. The joints were subjected to cyclic external loading. A constant preload of 25 kN was used for all the experiments conducted. During an experiment, the relative displacement between the two clamped plates, δ, was a controlling parameter. The reduction in clamping force, the applied transverse load, and the nut rotation were measured cycle by cycle. The relationship between, Δδ/2, the amplitude of the relative displacement between the two clamped plates, and, NL, the number of loading cycles to loosening is referred to as self-loosening curve and was obtained for different clamped lengths and applied load directions. Similar to a fatigue curve, an endurance limit can be identified from the self-loosening curve. It was found that increasing the clamped length can enhance the self-loosening endurance limits in terms of the controlled relative displacement of the two clamped plates. However, the load carrying capability was not influenced significantly due to the thickness of the clamped plates. For a given bolted jointed structure, an angle of the external load from the pure shearing direction resulted in an increase in self-loosening resistance.

Numerical and experimental investigation of the self-inducing turbine aeration capacity

2014 ◽  
Vol 83 ◽  
pp. 188-196 ◽  
Author(s):  
Ryma Achouri ◽  
Hatem Dhaouadi ◽  
Hatem Mhiri ◽  
Philippe Bournot
Keyword(s):  
Experimental Investigation ◽  
The Self ◽  
Aeration Capacity
Sign in / Sign up

Export Citation Format

Share Document