Laser Dermatology

2005 ◽  
Keyword(s):  
Laser Dermatology

Laser Dermatology

2008 ◽  
Vol 32 (1) ◽  
pp. 84-84
Author(s):  
WILLIAM P. COLEMAN
Keyword(s):  
Laser Dermatology

Guidelines of care for vascular lasers and intense pulse light sources from the European Society for Laser Dermatology

2015 ◽  
Vol 29 (9) ◽  
pp. 1661-1678 ◽  
Author(s):  
M. Adamič ◽  
M.D. Pavlović ◽  
A. Troilius Rubin ◽  
M. Palmetun-Ekbäck ◽  
P. Boixeda
Keyword(s):  
European Society ◽  
Intense Pulse Light ◽  
Light Sources ◽  
Pulse Light ◽  
Laser Dermatology

Laser Dermatology

2006 ◽  
Vol 32 (1) ◽  
pp. 84
Author(s):  
WILLIAM P. COLEMAN
Keyword(s):  
Laser Dermatology

Visualization and Characterization of the Flashing Spray of Cryogen R404a

2011 ◽  
Author(s):  
Z.-F. Zhou ◽  
W.-T. Wu ◽  
B. Chen ◽  
L.-J. Guo ◽  
Y.-S. Wang ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Droplet Diameter ◽  
Industrial Applications ◽  
Superheated Liquid ◽  
Liquid Droplets ◽  
Spray Distance ◽  
Spray Formation ◽  
Fine Droplet ◽  
Volatile Liquids ◽  
Laser Dermatology

Flashing spray of volatile liquids is a common phenomenon observed in many industrial applications such as fuel injection of engines, accidental release of flammable and toxic pressure-liquefied gases, failure of a vessel or pipe in the form of a small hole in chemical industry, and cryogenic spray cooling in laser dermatology. In flashing spray, the volatile liquid is depressurized rapidly at the exit of a nozzle (or a hole in a vessel) and becomes superheated. Such superheated liquid (in the form of either a jet or droplets) leads to explosive atomization, leading to fine droplet sizes and a short spray distance. This paper presents an experimental investigation of flashing spray of cryogen R404a. A photographic study of the spray is first conducted, providing visualization of spray formation and showing the dynamic characteristics of the spray. Then the R404a short spray is characterized by the phase Doppler particle analyzer (PDPA). The PDPA measurements provide the distributions of the diameter and velocities of liquid droplets in the spray., showing the dramatic dynamic variation of the liquid droplets due to explosive atomization of large droplets in the region near the exit of nozzle. The data finds that the average droplet axial velocity increases first to a maximum, followed by a gradual decrease, a typical variation expected for flashing spray. During the same time period, the average droplet diameter shows a quick decrease, from early large droplets of about 30 microns in diameter to fine droplet with about 10 microns within about 40 mm spray distance. This study provides quantitative data on droplet velocity and diameter in flashing spray, useful for model validation. The qualitative results help to have a better understanding of the flashing spray atomization mechanisms for volatile cryogens.

Recent advances in laser dermatology

2009 ◽  
Vol 11 (1) ◽  
pp. 2-10 ◽  
Author(s):  
Anjali Butani ◽  
Jacob Dudelzak ◽  
David J. Goldberg
Keyword(s):  
Recent Advances ◽  
Laser Dermatology

Laser dermatology – beware the sharks!

2014 ◽  
Vol 170 (2) ◽  
pp. 473-474 ◽  
Author(s):  
S. Karsai ◽  
M. Jünger
Keyword(s):  
Laser Dermatology

Laser Dermatology

2005 ◽  
Vol 141 (11) ◽  
Author(s):  
Murad Alam
Keyword(s):  
Laser Dermatology
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