Results 281 to 290 of about 6,019,713 (343)
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Chemical Reviews, 2019
Heterogeneous catalysis occurs on the surface of a catalyst particle in a gas or liquid environment of reactants. The surface of the catalyst particle acts as an active chemical agent directly participating in a chemical reaction performed at a solid-gas
L. Nguyen +4 more
semanticscholar +1 more source
Heterogeneous catalysis occurs on the surface of a catalyst particle in a gas or liquid environment of reactants. The surface of the catalyst particle acts as an active chemical agent directly participating in a chemical reaction performed at a solid-gas
L. Nguyen +4 more
semanticscholar +1 more source
Densification of silica glass at ambient pressure
The Journal of Chemical Physics, 2006We show that densification of silica glass at ambient pressure as observed in irradiation experiments can be attributed to defect generation and subsequent structure relaxation. In our molecular dynamics simulations, defects are created by randomly removing atoms, by displacing atoms from their nominal positions in an otherwise intact glass, and by ...
Lianqing, Zheng +4 more
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Journal of Supercritical Fluids, 2019
Despite their unique properties, pure silica aerogels usually exhibit a few applications on a large-scale due to their hydrophilic behavior and brittleness.
R. B. Torres +3 more
semanticscholar +1 more source
Despite their unique properties, pure silica aerogels usually exhibit a few applications on a large-scale due to their hydrophilic behavior and brittleness.
R. B. Torres +3 more
semanticscholar +1 more source
Effects of ambient pressure on smoke movement and temperature distribution in inclined tunnel fires
International journal of thermal sciences, 2019A series of simulations with regard to inclined road tunnel were conducted to investigate the effect of ambient pressure on smoke movement and temperature distribution. The tunnel slope and ambient pressure were systematically changed. When a fire breaks
J. Ji +5 more
semanticscholar +1 more source
, 2020
Ducted fuel injection (DFI) which mimics Bunsen burner, is a cutting-edge technology for reducing the soot formation of heavy-duty diesel engines. In this work, the Mie-scattering optical method was used to visualise impacts of ambient gas pressure on ...
Feng Li +4 more
semanticscholar +1 more source
Ducted fuel injection (DFI) which mimics Bunsen burner, is a cutting-edge technology for reducing the soot formation of heavy-duty diesel engines. In this work, the Mie-scattering optical method was used to visualise impacts of ambient gas pressure on ...
Feng Li +4 more
semanticscholar +1 more source
Influence of Ambient Air Pressure on Pressure-Swirl Atomization
Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations, 1987The spray characteristics of six simplex atomizers are examined in a pressure vessel using a standard light diffraction technique. Attention is focused on the effects of liquid properties, nozzle flow number, spray cone angle, and ambient air pressure on mean drop size and drop-size distribution.
X. F. Wang, A. H. Lefebvre
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Increasing keyhole stability of fiber laser welding under reduced ambient pressure
Journal of Materials Processing Technology, 2019Bead-on-plate laser welding was performed, and the inner keyhole behavior was observed through a transparent glass using a high-speed camera at various ambient pressures. The keyhole stability was investigated with respect to the keyhole profile area and
M. Jiang, Xi Chen, Yan-bin Chen, W. Tao
semanticscholar +1 more source
Pressure Response of Condenser Microphones at Low Ambient Pressures
The Journal of the Acoustical Society of America, 1961The frequency response characteristics of condenser microphones at low ambient pressures are of interest when such microphones are used to make measurements on high-altitude rockets and capsules. Pressure response curves at a number of ambient pressures in the range 106 d/cm2 (atmospheric pressure at sea level) to 1.7×104 d/cm2 (atmospheric pressure at
James D. Chalupnik +2 more
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International journal of thermal sciences, 2019
Thermal driven smoke backlayering in tunnels with longitudinal ventilation is a huge threat to the trapped people during fires. To explore the influence of ambient pressure on smoke backlayering distance and critical ventilation velocity of thermal ...
Fangyi Guo +5 more
semanticscholar +1 more source
Thermal driven smoke backlayering in tunnels with longitudinal ventilation is a huge threat to the trapped people during fires. To explore the influence of ambient pressure on smoke backlayering distance and critical ventilation velocity of thermal ...
Fangyi Guo +5 more
semanticscholar +1 more source
Flame radiation emission from pool fires under the influence of cross airflow and ambient pressure
Combustion and Flame, 2019This paper investigated the effects of changing ambient pressure (standard- and sub-atmospheric conditions) and crossflow air speed on the flame radiation fraction of a pool fire for a size range of pools where no data were available in the literature ...
Xiaolei Zhang +3 more
semanticscholar +1 more source