Mathematical modeling of polymeric cover outgassing process in open space conditions

Analysis of Halbach array placed in open space by using finite element method involves substantial consumption of memory, time, and cost. To address this problem, development of a mathematical modeling and analytic analysis method for Halbach array can be a solution, but research on this topic is currently insufficient. Therefore, a novel mathematical modeling and analytic analysis method for Halbach array in open space is proposed in this study, which is termed as the Ampere model and the Biot–Savart law (AB method). The proposed AB method can analyze the Halbach array rapidly and accurately with minimal consumption of memory. The usefulness of the AB method in terms of accuracy and memory and time consumption is verified by comparing the AB method with finite element method in this paper.

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Studying regularities of functioning of passive droplet-sheet collectors in radiator systems under open space conditions

Thermal Engineering ◽

10.1134/s0040601514140043 ◽

2014 ◽

Vol 61 (14) ◽

pp. 1021-1029

Author(s):

A. A. Koroteev ◽

E. S. Popushina ◽

A. B. Samsonov

Keyword(s):

Open Space ◽

Space Conditions ◽

Regularities Of Functioning

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Análise do comportamento oscilatório de gotas de fluidos de van der Waals sob condições de microgravidade usando o método Smoothed Particle Hydrodynamics

Ciência e Natura ◽

10.5902/2179460x33534 ◽

2019 ◽

Vol 41 ◽

pp. 9

Author(s):

Géssica Ramos da Silva ◽

Maicon De Paiva Torres ◽

Marciana Lima Góes ◽

Helio Pedro Amaral Souto

Keyword(s):

Smoothed Particle Hydrodynamics ◽

Open Space ◽

Van Der Waals ◽

Oscillatory Behavior ◽

Smoothing Function ◽

Sph Method ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

Smoothed Particle Hydrodynamics Method ◽

Space Conditions

In the present work, the Smoothed Particle Hydrodynamics method (SPH) is employed in the modeling of a two-dimensional drop formation problem, without an external atmosphere, using a van der Waals fluid. In addition, influences of Reynolds number, initial aspect ratio and Péclet number on drops oscillatory behavior are studied in open space conditions with zero gravity assumption. In view of the most recent researches in drops formation field using the SPH method, a hyperbolic kernel is applied to all simulations in order to ensure uniform drops liquid formation, i.e., without particle agglomeration. Through the usage of this smoothing function the tensile instability is reduced, avoiding unnecessary numerical treatments.

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A film flow in a drop catcher in space conditions

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2007.1.028 ◽

2007 ◽

Vol 5 ◽

pp. 235-240

Author(s):

A.A. Koroteev ◽

A.N. Osiptsov ◽

E.S. Popushina

Keyword(s):

Steady State ◽

Open Space ◽

Film Flow ◽

Numerical Study ◽

Film Surface ◽

Inlet Section ◽

Outlet Channel ◽

Flow Parameters ◽

State Regime ◽

Space Conditions

A non-isothermal film flow is considered, which is formed on the inner surface of a conical drop catcher on whose inlet a uniform stream of a droplet medium is supplied under open space conditions. For the regime of inertial deposition of droplets, under the assumption of small relative thickness of the film and the absence of droplets rebounced from the film surface asymptotic models of steady-state film flow are constructed and studied. For a slow isothermal flow, the shape and parameters of the film are found analytically. For a general case, a parameteric numerical study ща the velocity and temperature distributions, as well as the film thickness, is performed. The flow parameters in the inlet section of the outlet channel are determined, and the conditions required for the steady-state regime of drop catcher operation are found.

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Oak (Quercus robur L.) seedling responses to a realistic increase in UV-B radiation under open space conditions

Chemosphere ◽

10.1016/s0045-6535(97)10135-7 ◽

1998 ◽

Vol 36 (4-5) ◽

pp. 841-845 ◽

Cited By ~ 17

Author(s):

F. Antonelli ◽

F. Bussotti ◽

D. Grifoni ◽

P. Grossoni ◽

B. Mori ◽

...

Keyword(s):

Quercus Robur ◽

Open Space ◽

Space Conditions

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The study of Terrestrial microorganisms in space conditions and search for extraterrestrial microorganisms on space bodies

10.5194/epsc2020-106 ◽

2020 ◽

Author(s):

Gali Garipov ◽

Mikhail Panasyuk ◽

Sergey Svertilov ◽

Ivan Konyukhov ◽

Sergey Pogosyan ◽

...

Keyword(s):

Remote Sensing ◽

Open Space ◽

Interplanetary Space ◽

Artificial Satellites ◽

Earth Space ◽

Near Earth Space ◽

The Earth ◽

Space Objects ◽

Space Conditions ◽

Cosmic Origin

The aim of the researches is detecting and exploration of microorganisms of Terrestrial and Cosmic origin. Microorganisms are supposed to be studied in the near-earth space on space objects of manmade origin and on the space bodies of Solar system in the extraterrestrial space, including&#160;&#160; planets. For research, it is proposed to use the properties of microorganisms to emit a fluorescent glow when they irradiated with flashes of light causing their fluorescence. One of the research tasks is to search for terrestrial microorganisms that have occurred in space from Earth, as well as research of the survival of the terrestrial microorganisms in space conditions which shall be placed in special laboratories on board of the microsatellites on the Earth. The second task is to search for microorganisms on space bodies in interplanetary space by remote sensing of the surface of space bodies by flashes of light. To solve the first problem of this work is considered an example of a micro-laboratory for the study of terrestrial microorganisms located in space conditions in near-earth space on microsatellites. &#160;To solve the second problem, is considered an example of remote sensing equipment of space objects for searching for microorganisms on space bodies in interplanetary space which is installed on board of microsatellite created for far space exploration. Concerning to the first task it is shown that in automatic laboratories on microsatellites, it is possible to study the dynamics of microorganisms survival in space in conditions with a fixed habitat similar to earth's and in a changing environment that adequate the entry of microorganisms into open space and return them back to the earth conditions. Concerning to the second task it is shown that colonies of microorganisms on the surface of space bodies can be detected and studied from the orbits of their artificial satellites or from flight path trajectories near the space body at distances in order 200 km, and single microorganisms can be detected and studied at distances in order hundreds of meters

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Development of high-performance objective lens polepiece for ultrahigh resolution Analytical Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100147119 ◽

1993 ◽

Vol 51 ◽

pp. 254-255

Author(s):

K. Fukushima ◽

T. Kaneyama ◽

F. Hosokawa ◽

H. Tsuno ◽

T. Honda ◽

...

Keyword(s):

Electron Microscope ◽

High Performance ◽

Open Space ◽

Materials Science ◽

Objective Lens ◽

Ultrahigh Resolution ◽

Science Field ◽

Specimen Holder ◽

Analytical Electron ◽

Analytical Electron Microscope

Recently, in the materials science field, the ultrahigh resolution analytical electron microscope (UHRAEM) has become a very important instrument to study extremely fine areas of the specimen. The requirements related to the performance of the UHRAEM are becoming gradually severer. Some basic characteristic features required of an objective lens are as follows, and the practical performance of the UHRAEM should be judged by totally evaluating them.1) Ultrahigh resolution to resolve ultrafine structure by atomic-level observation.2) Nanometer probe analysis to analyse the constituent elements in nm-areas of the specimen.3) Better performance of x-ray detection for EDS analysis, that is, higher take-off angle and larger detection solid angle.4) Higher specimen tilting angle to adjust the specimen orientation.To attain these requirements simultaneously, the objective lens polepiece must have smaller spherical and chromatic aberration coefficients and must keep enough open space around the specimen holder in it.

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