scholarly journals A didactic experiment to evaluate the calibration of pressure gauges in low-medium vacuum range

2021 ◽  
Vol 1826 (1) ◽  
pp. 012001
Author(s):  
B A Rodrigues Filho ◽  
L M F Fagundes ◽  
N H Medina
Keyword(s):  
Medium Vacuum

UHV system for quasistatic characterization of adsorbers for medium vacuum applications

Vacuum ◽  
2018 ◽  
Vol 151 ◽  
pp. 254-260 ◽  
Author(s):  
Mihail P. Petkov ◽  
David M. Soules
Keyword(s):  
Medium Vacuum

scholarly journals Cortex Effect on Vacuum Drying Process of Porous Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Zhijun Zhang ◽  
Shiwei Zhang ◽  
Tianyi Su ◽  
Shuangshuang Zhao
Keyword(s):  
Mass Transfer ◽  
Porous Medium ◽  
Fruits And Vegetables ◽  
Water Saturation ◽  
Coupled Model ◽  
Water Evaporation ◽  
Vacuum Drying ◽  
Vapor Pressures ◽  
Drying Process ◽  
Medium Vacuum

Corns, fruits, and vegetables are usually used as porous medium in drying process. But in fact, it must be considered as the cortex effect on mass transfer because the mass transfer of cortex is very difficult than inner medium. Based on the theory of heat and mass transfer, a coupled model for the porous medium vacuum drying process with cortex effect is constructed. The model is implemented and solved using COMSOL software. The water evaporation rate is determined using a nonequilibrium method with the rate constant parameterKrthat has been studied. The effects of different vapor pressures (1000, 5000, and 9000 Pa), initial moisture contents (0.3, 0.4, and 0.5 water saturation), drying temperatures (323, 333, and 343 K), and intrinsic permeability for cortex part (10−13, 10−14, 10−15 m2) on vacuum drying process were studied. The results facilitate a better understanding of the porous medium vacuum drying process that nearer to the reality.

N/sub 2/ gas absorption in cathodic arc apparatus with an Al cathode under medium vacuum

1999 ◽  
Vol 27 (4) ◽  
pp. 1034-1038 ◽  
Author(s):  
H. Takikawa ◽  
N. Kawakami ◽  
T. Sakakibara
Keyword(s):  
Gas Absorption ◽  
Cathodic Arc ◽  
Medium Vacuum

An experimental test-stand for investigation of electron-beam synthesis of dielectric coatings in medium vacuum pressure range

Vacuum ◽  
2019 ◽  
Vol 163 ◽  
pp. 31-36 ◽  
Author(s):  
A.V. Tyunkov ◽  
V.A. Burdovitsin ◽  
E.M. Oks ◽  
Yu.G. Yushkov ◽  
D.B. Zolotukhin
Keyword(s):  
Electron Beam ◽  
Experimental Test ◽  
Pressure Range ◽  
Test Stand ◽  
Vacuum Pressure ◽  
Dielectric Coatings ◽  
Medium Vacuum

Nitriding of titanium in electron beam excited plasma in medium vacuum

2020 ◽  
Vol 383 ◽  
pp. 125241 ◽  
Author(s):  
A.V. Tyunkov ◽  
D.A. Golosov ◽  
D.B. Zolotukhin ◽  
A.V. Nikonenko ◽  
E.M. Oks ◽  
...  
Keyword(s):  
Electron Beam ◽  
Medium Vacuum

Development of Localized Roots Type Medium-Vacuum Pump

2011 ◽  
Vol 14 (3) ◽  
pp. 23-27
Author(s):  
Bong-Yeol Tak ◽  
Byung-Duk Kim ◽  
Hea-Gyeong Yang ◽  
Gi-Young Han ◽  
So-A Lee
Keyword(s):  
Vacuum Pump ◽  
Medium Vacuum
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