Modeling the Conditions for Microdroplets Formation and their Detachment from the Molten Metal on the Electrode

2021 ◽  
Vol 313 ◽  
pp. 1-7
Author(s):  
V.D. Sarychev ◽  
S.A. Solodsky ◽  
Sergey A. Nevskii ◽  
M.A. Kuznetsov ◽  
D.P. Ilyaschenko ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Molten Metal ◽  
High Frequency ◽  
Plasma Discharge ◽  
Pulse Action ◽  
Materials Processing ◽  
Physical Processes ◽  
Micro Scale ◽  
Physical Mechanisms ◽  
Frequency Pulse

Formation of nanostructure states on the surface of materials exposed to concentrated flows of energy is one of the relevant problems of modern materials processing. In the paper the authors describe the mechanism of the micro-scale droplets formation based on the study and modeling of the physical processes and technological aspects of the interaction between the heterogenic plasma flows and the molten substance at the electrode tip. The authors show new physical mechanisms and criteria for micro-and nanoparticles origination, develop a physical-mathematical model of the interaction between the molten metal and the plasma discharge with imposed high-frequency pulse action.

Pivot–slide model of the motion of a curling rock

2016 ◽  
Vol 94 (12) ◽  
pp. 1305-1309 ◽  
Author(s):  
Mark R.A. Shegelski ◽  
Edward Lozowski
Keyword(s):  
Mathematical Model ◽  
Weak Dependence ◽  
Physical Processes ◽  
Physical Mechanisms ◽  
Model Predictions

We present the framework of a new mathematical model to account for the curl of a curling rock. The model is based upon two physical processes: a brief pivot of the rock around a point directly beneath the contact annulus, followed by a longer slide. The model predictions agree with observed curl distances on pebbled ice. The model also gives a weak dependence of the curl distance on the rate of rotation of the rock, in agreement with observations. We suggest possible physical mechanisms to initiate these two processes.

The High Frequency Pulse Effect and Verification in the Welding Process for High-Strength Aluminum Alloy

2011 ◽  
Vol 130-134 ◽  
pp. 27-31 ◽  
Author(s):  
Si Bo Yan ◽  
Yong Lun Song ◽  
Jun Zhang ◽  
Li Lai Bai
Keyword(s):  
Aluminum Alloy ◽  
Pulse Energy ◽  
High Frequency ◽  
Welding Process ◽  
High Strength ◽  
Pulse Action ◽  
Welding Seam ◽  
Butt Welding ◽  
High Strength Aluminum Alloy ◽  
Frequency Pulse

The plate butt welding tests have been carried out to the 2219 high-strength aluminum alloy material by utilizing the self-development compound high frequency pulse TIG power source, whose results show that the mechanical properties of the welding seam may be effectively enhanced by adding the high frequency pulse energy. Therefore, a acoustic emission sensing system was established to acquire the transmission effect of the high frequency pulse arc energy during the welding process; moreover, the influence on the welding seam microstructures by the compound high frequency pulse energy has been studied. The results show the following effects: the porosity number at the both sides of the welding seam fusion line may be decreased significantly by adding the high frequency pulse energy; The analysis to the high frequency pulse action mechanism has been carried out according to the above conclusions to provide the technology theory base for improving and enhancing the aluminum alloy welding joint performances.

scholarly journals Simulation of Electromagnetic-Acoustic Heating of the Oil Layer in Laboratory Conditions

2021 ◽  
Vol 16 (1) ◽  
pp. 109-116
Author(s):  
Gulnara R. Izmailova
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Mathematical Model ◽  
High Frequency ◽  
Additional Term ◽  
Oil Reservoir ◽  
Combined Effects ◽  
Physical Processes ◽  
The Mathematical Model ◽  
Account Heat

This paper describes an experiment to study the combined effects of high-frequency electromagnetic and acoustic fields on a model of an oil reservoir. A mathematical model is described that describes the physical processes that occur in the reservoir. The heat equation takes into account heat transfer with the environment by introducing an additional term. The largest discrepancy between theoretical and experimental data does not exceed 28%. Qualitative coincidence of theoretical and experimental curves indicates the adequacy of the mathematical model.

scholarly journals The Effect of High Frequency Pulse on the Discharge Probability in Micro EDM

2017 ◽  
Vol 281 ◽  
pp. 012031
Author(s):  
Y Liu ◽  
Y Qu ◽  
W Zhang ◽  
F Ma ◽  
Z Sha ◽  
...  
Keyword(s):  
High Frequency ◽  
Micro Edm ◽  
Frequency Pulse

scholarly journals Transfer of diclofenac sodium across excised guinea pig skin on high-frequency pulse iontophoresis. I. Equivalent circuit model.

1990 ◽  
Vol 38 (4) ◽  
pp. 1019-1021 ◽  
Author(s):  
Tamotsu KOIZUMI ◽  
Masawa KAKEMI ◽  
Kazunori KATAYAMA ◽  
Hirohiko INADA ◽  
Kazuyoshi SUDEJI ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Equivalent Circuit ◽  
High Frequency ◽  
Diclofenac Sodium ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Pig Skin ◽  
Frequency Pulse

scholarly journals Power MOSFET Linearizer of a High-Voltage Power Amplifier for High-Frequency Pulse-Echo Instrumentation

Sensors ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 764 ◽  
Author(s):  
Hojong Choi ◽  
Park Woo ◽  
Jung-Yeol Yeom ◽  
Changhan Yoon
Keyword(s):  
Power Amplifier ◽  
High Voltage ◽  
High Frequency ◽  
Power Mosfet ◽  
Pulse Echo ◽  
Frequency Pulse

The Effect of HFPD Thermally Sprayed WC-Co Coatings on the Fatigue Behavior and Deformation of Al 2024-T4

2000 ◽  
Author(s):  
A. Ibrahim ◽  
C.C. Berndt
Keyword(s):  
High Frequency ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Pulse Detonation ◽  
Deformation Behaviors ◽  
Life Distributions ◽  
Thermally Sprayed ◽  
Al 2024 ◽  
Frequency Pulse

Abstract The effect of high frequency pulse detonation (HFPD) and HVOF thermally sprayed WC-Co coatings on the high cycle fatigue (HCF) behavior of 2024-T4 aluminum was investigated. The fatigue life distributions of specimens in the polished and coated conditions are presented as a function of the probability of failure. The monotonic and cyclic deformation behaviors of the as-received and as-coated specimens were investigated. The conclusions show that, (i) the HFPD sprayed specimens exhibited slightly higher fatigue lives compared to the uncoated specimens, (ii) the HVOF sprayed specimens exhibited significantly higher fatigue lives compared to the uncoated specimens, and (iii) the as-coated specimen was cyclically stable.

scholarly journals Erratum to: “Influence of external conditions on physical processes and plasma parameters in a model of a high-frequency hybrid plasma system”

2017 ◽  
Vol 46 (4) ◽  
pp. 299-299
Author(s):  
A. F. Aleksandrov ◽  
A. K. Petrov ◽  
K. V. Vavilin ◽  
E. A. Kral’kina ◽  
P. A. Neklyudova ◽  
...  
Keyword(s):  
High Frequency ◽  
Physical Processes ◽  
Plasma Parameters ◽  
Plasma System ◽  
Hybrid Plasma ◽  
External Conditions
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