The optimal nose shape of a rigid projectile deeply penetrating into a solid target considering friction

2022 ◽  
pp. 104157
Author(s):  
D.Z. Yankelevsky ◽  
V.R. Feldgun ◽  
Y.S. Karinski
Keyword(s):  
Solid Target ◽  
Rigid Projectile ◽  
Nose Shape

scholarly journals Enhanced X-ray emission arising from laser-plasma confinement by a strong transverse magnetic field

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Evgeny D. Filippov ◽  
Sergey S. Makarov ◽  
Konstantin F. Burdonov ◽  
Weipeng Yao ◽  
Guilhem Revet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic ◽  
Radiative Properties ◽  
Magnetic Field Direction ◽  
Solid Target ◽  
Total Plasma ◽  
Plasma Confinement ◽  
X Ray ◽  
Magnetic Compression ◽  
The Magnetic Field

AbstractWe analyze, using experiments and 3D MHD numerical simulations, the dynamic and radiative properties of a plasma ablated by a laser (1 ns, 10$$^{12}$$ 12 –10$$^{13}$$ 13 W/cm$$^2$$ 2 ) from a solid target as it expands into a homogeneous, strong magnetic field (up to 30 T) that is transverse to its main expansion axis. We find that as early as 2 ns after the start of the expansion, the plasma becomes constrained by the magnetic field. As the magnetic field strength is increased, more plasma is confined close to the target and is heated by magnetic compression. We also observe that after $$\sim 8$$ ∼ 8  ns, the plasma is being overall shaped in a slab, with the plasma being compressed perpendicularly to the magnetic field, and being extended along the magnetic field direction. This dense slab rapidly expands into vacuum; however, it contains only $$\sim 2\%$$ ∼ 2 % of the total plasma. As a result of the higher density and increased heating of the plasma confined against the laser-irradiated solid target, there is a net enhancement of the total X-ray emissivity induced by the magnetization.

scholarly journals Nasal Morphology and Its Correlation to Craniofacial Morphology in Lateral Cephalometric Analysis

2021 ◽  
Vol 18 (6) ◽  
pp. 3064
Author(s):  
Agnieszka Jankowska ◽  
Joanna Janiszewska-Olszowska ◽  
Katarzyna Grocholewicz
Keyword(s):  
Soft Tissue ◽  
Nasal Bone ◽  
Correlation Coefficients ◽  
Craniofacial Morphology ◽  
Base Angle ◽  
Nasolabial Angle ◽  
Orthodontic Patients ◽  
Nose Shape ◽  
The Relationship ◽  
Spearman’S Correlation

Nose shape, size, and inclination influence facial appearance, but few studies concern the relationship between the nasal profile and craniofacial structures. The objective of this study was to analyze association of nasal cephalometric variables with skeletal structures, age, and sex. Cephalometric and nasal analysis was performed in 386 Polish orthodontic patients (aged 9–25 years). Student t-test and Mann–Whitney test were used to compare quantitative variables and Pearson’s or Spearman’s correlation coefficients—to find correlations. Soft tissue facial convexity angle correlates to Holdaway ratio, ANB (A-Nasion-B), and Wits appraisal. Nasal dorsum axis, nose length, nose depth (1) and nose depth (2), nose hump, lower dorsum convexity, and columella convexity increase with age. Nasal base angle, nasolabial angle, nasomental angle, soft tissue facial convexity and nasal bone angle decrease with age. Nasal base angle and nasomental angle are smaller in females. Thus, a relationship exists between nasal morphology and sagittal jaw configuration. Nasal parameters significantly change with age. Sexual dimorphism characterizes nasal bone angle and nasomental angle.

scholarly journals 89Zr cyclotron-based production by a suitable Y solid target

2021 ◽  
Vol 96-97 ◽  
pp. S12
Author(s):  
Sara Cisternino ◽  
Hanna Skliarova ◽  
Emiliano Cazzola ◽  
Giancarlo Gorgoni ◽  
Umberto Anselmi-Tamburini ◽  
...  
Keyword(s):  
Solid Target

scholarly journals Analysis of Scour Depth Around Bridge Piers With Round Nose Shape by HEC-RAS 5.0.7 Software

2021 ◽  
Vol 1764 (1) ◽  
pp. 012151
Author(s):  
C S Silvia ◽  
M Ikhsan ◽  
A Wirayuda ◽  
Mastiar
Keyword(s):  
Bridge Piers ◽  
Scour Depth ◽  
Nose Shape

scholarly journals Femtosecond, two-dimensional spatial Doppler mapping of ultraintense laser-solid target interaction

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Kamalesh Jana ◽  
Amit D. Lad ◽  
David West ◽  
Will Trickey ◽  
Chris Underwood ◽  
...  
Keyword(s):  
Solid Target ◽  
Two Dimensional ◽  
Target Interaction

Optimal focusing of laser radiation on the surface of a solid target

1975 ◽  
Vol 5 (7) ◽  
pp. 871-872 ◽  
Author(s):  
Konstantin N Koshelev ◽  
Sergei V Chekalin ◽  
S S Churilov
Keyword(s):  
Laser Radiation ◽  
Solid Target ◽  
Optimal Focusing

Fuel Leaking Analysis of Fuel Tank by Projectiles Impact with Mechanical Properties of Projectiles

2013 ◽  
Vol 644 ◽  
pp. 203-206
Author(s):  
Hai Liang Cai ◽  
Bi Feng Song ◽  
Yang Pei ◽  
Shuai Shi
Keyword(s):  
High Speed ◽  
Drop Size ◽  
Fuel Tank ◽  
Size Distributions ◽  
Sauter Mean Diameter ◽  
Fuel Droplets ◽  
High Speed Impact ◽  
Fuel Tanks ◽  
Rigid Projectile ◽  
Drop Size Distributions

For making sure the dry bay ignition and fire, it’s necessary to calculate the number and the sizes of the droplets and determine the mass flow rate of the fuel induced by high-speed impact and penetration of a rigid projectile into fuel tank. An analytical model is founded and the method for calculating the initial leaking velocity of the fuel is determined. It gives the equation for calculating the drop size distributions of fuel and the Sauter mean diameter (SMD) of droplets, through the Maximum Entropy Theory and the conservation for mass. Using the Harmon’s equation for SMD,the fuel droplets SMD can be calculated. Results shows that the initial leaking velocity of the fuel is about linearly increasing with the velocity of the projectile, the SMD of fuel droplets increases with the hole size of the fuel tank which induced by the penetration of the projectile and linearly decreases with the velocity of the projectile. The results can be used for the ignition and fire analysis of the dry bay adjacent to fuel tanks.

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