Investigation of the Formation and the Applications of Ice Powder

2002 ◽  
Author(s):  
D. V. Shishkin ◽  
E. S. Geskin ◽  
B. Goldenberg
Keyword(s):  
Precision Machining ◽  
Water Ice ◽  
Ice Particles ◽  
Waterjet Machining ◽  
Hypothetical Mechanism ◽  
Auto Parts ◽  
Is Integration ◽  
Ice Powder ◽  
Set Up ◽  
Polished Metal

Water ice powder constitutes a potentially important manufacturing tool. Availability and cleanliness of this powder constitute its major advantage. It was shown that the ice particles can be used as an abrasive in the course of waterjet machining. Although the erosion potential of ice particle is inferior to that of the conventional abrasives the environmental soundness of ice enables us to expend the use of the ice abrasive jets on food industry, medicine, precision machining, etc. The principal issue in the use of the ice abrasives is particles formation. Analysis of various technologies showed that the most effective avenue in particles production is integration of the water freezing and ice decomposition. As the results, the desired flow rate of ice particles at the desired temperature and size distribution can be generated. The objective of the presented paper was the experimental investigation of the production of ice particles. An experimental set up was constructed and used for particles fabrication at controlled conditions. The acquired information was applied for the analysis of the phenomena leading to the particles formation. As the result a hypothetical mechanism of the ice decomposition was suggested and validated. The experiments involving the decontamination of the electronic devices, semiconductors, fabric, leather, food products, polished metal, soft plastics, rusted auto parts, etc were carried out in order to demonstrate the potential application of the ice blasting.

Investigation of the Formation and Applications of Ice Powder

2005 ◽  
Vol 72 (2) ◽  
pp. 222-226
Author(s):  
D. V. Shishkin ◽  
E. S. Geskin ◽  
B. S. Goldenberg
Keyword(s):  
Particle Production ◽  
Precision Machining ◽  
Water Ice ◽  
Ice Particles ◽  
Waterjet Machining ◽  
Hypothetical Mechanism ◽  
Auto Parts ◽  
Is Integration ◽  
Ice Powder ◽  
Polished Metal

Water ice powder constitutes a potentially important manufacturing tool. Availability and cleanliness of this powder constitute its major advantage. It was shown that the ice particles could be used as an abrasive in the course of waterjet machining. Although the erosion potential of ice particles is inferior to that of the conventional abrasives, the environmental soundness of ice enables us to expend the use of the ice abrasive jets on food industry, medicine, precision machining, etc. The principal issue in the use of the ice abrasives is particles formation. Analysis of various technologies showed that an effective avenue in particle production is integration of the water freezing and ice decomposition. As the results, the desired flow rate of ice particles at the desired temperature and size distribution can be generated. The objective of the present paper is the experimental investigation of the production of ice particles. An experimental setup was constructed and used for particles fabrication at controlled conditions. The acquired information was applied for the analysis of the phenomena leading to the particles formation. As a result a hypothetical mechanism of the ice decomposition was suggested and validated. The experiments involving the decontamination of the electronic devices, semiconductors, fabric, leather, food products, polished metal, soft plastics, rusted auto parts, etc., were carried out in order to demonstrate the potential application of the ice blasting.

scholarly journals THE STICKINESS OF MICROMETER-SIZED WATER-ICE PARTICLES

2014 ◽  
Vol 798 (1) ◽  
pp. 34 ◽  
Author(s):  
B. Gundlach ◽  
J. Blum
Keyword(s):  
Water Ice ◽  
Ice Particles

scholarly journals Synthesis of water ice particles in a plasma chamber

2010 ◽  
Vol 115 (D18) ◽  
Author(s):  
S. Shimizu ◽  
B. Klumov ◽  
T. Shimizu ◽  
H. Rothermel ◽  
O. Havnes ◽  
...  
Keyword(s):  
Water Ice ◽  
Plasma Chamber ◽  
Ice Particles

scholarly journals Micrometer-sized Water Ice Particles for Planetary Science Experiments: Influence of Surface Structure on Collisional Properties

2017 ◽  
Vol 848 (2) ◽  
pp. 96 ◽  
Author(s):  
S. Gärtner ◽  
B. Gundlach ◽  
T. F. Headen ◽  
J. Ratte ◽  
J. Oesert ◽  
...  
Keyword(s):  
Surface Structure ◽  
Planetary Science ◽  
Water Ice ◽  
Ice Particles

Experimental Study on Machining of Hybrid Composite Stacks Using Submerged Abrasive Waterjet Machining Process

2018 ◽  
Author(s):  
Mayur Narkhede ◽  
Sagil James
Keyword(s):  
Experimental Study ◽  
Grain Size ◽  
Hybrid Composite ◽  
Machining Process ◽  
Critical Parameters ◽  
Abrasive Waterjet ◽  
Precision Machining ◽  
Abrasive Waterjet Machining ◽  
Abrasive Grain ◽  
Waterjet Machining

The research involves experimental study on precision machining of hybrid composite stacks using Submerged Abrasive Waterjet Machining (SAWJM) process. In this study, an in-house fabricated SAWJM setup is used to machine a stack of Carbon Fiber Reinforced Polymer (CFRP) and Titanium. The effect of critical parameters including stand-off distance and abrasive grain size on the size of the cavity machined during SAWJM and Abrasive Waterjet Machining (AWJM) processes are studied. The study found that SAWJM process is capable of successfully machining CFRP/Titanium composites with high precision. The machined surface is free of thermal stresses and did not show any delamination or cracking around the edges. The study suggested that the stand-off distance and abrasive grain size has significant influence on the machining process. The cavities machined on both CFRP and titanium during SAWJM process are smaller and more circular than that produced during AWJM process. The results of this study provide deeper insight into precision machining of hybrid composite stacks.

scholarly journals Polarimetry of Water Ice Particles Providing Insights on Grain Size and Degree of Sintering on Icy Planetary Surfaces

2018 ◽  
Vol 123 (10) ◽  
pp. 2564-2584 ◽  
Author(s):  
O. Poch ◽  
R. Cerubini ◽  
A. Pommerol ◽  
B. Jost ◽  
N. Thomas
Keyword(s):  
Grain Size ◽  
Planetary Surfaces ◽  
Water Ice ◽  
Ice Particles

Experimental Analysis of Heat Transfer From Ice Rink Floors

Solar Energy ◽  
2006 ◽  
Author(s):  
Jung Mun ◽  
Moncef Krarti
Keyword(s):  
Heat Transfer ◽  
Thermal Resistance ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Experimental Analysis ◽  
Experimental Results ◽  
Water Ice ◽  
Set Up ◽  
Time Required ◽  
The Impact

This paper describes an experimental set-up to evaluate the refrigeration loads for ice rink floors under controlled conditions. The ice-rink set-up was instrumented to measure the temperatures along various locations within the ice-rink floor including the water/ice layer. In addition, the energy used to freeze the water is monitored over the entire charging cycle to evaluate the performance of the ice rink floor for various insulation thermal resistance values (or R-values). Four floor insulation configurations are considered in the experimental analysis of R-0 (no insulation), R-4.2, R-6.7 and R-10 (in IP unit: hr.ft2.°F/Btu). The impact of the air temperature above the ice rink is also evaluated. The experimental results confirm that the addition of the thermal insulation beneath the ice-rink floor reduces the refrigeration load, decreased the time required to freeze the water above the ice rink, and helps maintain lower average ice temperature.

Analysis of Characteristics and Safety of Numerically Controlled Lathe

2012 ◽  
Vol 214 ◽  
pp. 887-892
Author(s):  
Ying Nan Zhou
Keyword(s):  
Coordinate System ◽  
Production Management ◽  
High Technology ◽  
Physical Structure ◽  
Precision Machining ◽  
Processing Quality ◽  
Technology Knowledge ◽  
Security Issues ◽  
Set Up ◽  
High Flexibility

Numerically controlled lathe has the features of high flexibility and high precision machining, efficient and conducive to the production management, and requires the operator to high technology, knowledge of programming concepts. During operation, the following security issues can use the following ways to reduce: numerically controlled lathe’s commonly programmed must be right, numerically controlled lathe’s processing procedures must be checked to get rid of its being breakdown, coordinate system and tool radius compensation’s install must be right, pay attention to teaching and management to reduce the rate of accidents’ happen, set up physical structure to separate machine and operator. By knowing the features of numerically controlled lathe can reduce accidents. Numerically controlled lathe has good processing quality, high product efficiency, simple operation advantages, but it may easily get into trouble when processing. So knowing numerically controlled lathe’s features and security problems can promote production’s rate and guarantee operator’s safety.

scholarly journals Ice Condensation as a Planet Formation Mechanism

2013 ◽  
Vol 8 (S299) ◽  
pp. 382-383
Author(s):  
Katrin Ros
Keyword(s):  
Formation Mechanism ◽  
Time Scale ◽  
Planet Formation ◽  
Particle Growth ◽  
Dynamical Behaviour ◽  
Water Ice ◽  
Ice Particles ◽  
Size Evolution ◽  
Protoplanetary Discs

AbstractParticles in protoplanetary discs grow rapidly to millimetre-sizes via coagulation, but further growth to centimetre-sized pebbles is not yet completely understood. We investigate particle growth by ice condensation in a model where we take the dynamical behaviour of vapour and ice particles into account, as well as the size evolution due to condensation and sublimation. Our results show that efficient growth from dust to pebbles is possible close to the water ice line at ~3 AU, with particles growing from millimetres to decimetres on a time scale of 10000 yr.

Secondary Ice Production – development of a new experimental set-up

2021 ◽  
Author(s):  
Susan Hartmann ◽  
Alice Keinert ◽  
Alexei Kiselev ◽  
Frank Stratmann
Keyword(s):  
Particle Number ◽  
Number Concentration ◽  
Mixed Phase ◽  
Sugar Solution ◽  
Particle Number Concentration ◽  
Ice Particles ◽  
Thin Carbon ◽  
Set Up ◽  
Ice Production ◽  
Mixed Phase Clouds

<p>Mixed-phase clouds are essential elements in Earth’s weather and climate system. Aircraft measurements of mixed-phase clouds demonstrated a strong discrepancy between the observed ice particle and ice nucleating particle number concentration of one to four orders of magnitude [1-4]. Different secondary ice production (SIP) mechanisms have been hypothesized which can increase the total ice particle number concentration by multiplication of primary ice particles and hence might explain the observed discrepancy [5-7].</p><p>In a joint project of KIT and Tropos, we focus on the investigation two SIP processes: shattering of large freezing droplets (KIT) and SIP as a result of droplet-ice collisions (Tropos), commonly known as Hallett-Mossop [9] or rime-splintering process. Thereby, we aim at a quantitative understanding of the SIP underlying physical mechanisms, utilizing a newly developed experimental set-up (Ice Droplets splintEring on FreezIng eXperiment, IDEFIX).  </p><p>IDEFIX is based on a modular concept and consists of three modules, i.e., the SIP chamber, the growth section, and the ice particle detector. We developed two different versions of the SIP chamber: in the KIT-SIP chamber a freezing drizzle droplet is levitated in electrodynamic balance; and in the TROPOS-SIP chamber quasi-monodisperse droplets collide with an ice particle which is fixed on thin carbon fibers. IDEFIX is designed to match realistic fall or impact velocities and collision rates of the droplets with the ice particle. The SIP process will be observed with high-speed video microscopy and an infrared measuring system. In the growth section, which features supersaturated conditions with respect to ice, the presumably small secondarily produced ice particles will be grown to detectable sizes. Finally, to count the number of secondarily produced ice particles either an optical particle spectrometer will be used for distinguishing between droplets and ice particles, or the ice particles will be impacted on a metastable sugar solution. Currently, we characterize velocity, temperature and humidity fields of the TROPOS-collision chamber and determine droplet-ice particle collision rates.</p>

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