Model Investigations of the Spreading of Heavy Gases Released from an Instantaneous Volume Source at the Ground

1981 ◽  
pp. 433-448 ◽  
Author(s):  
A. Lohmeyer ◽  
R. N. Meroney ◽  
E. J. Plate
Keyword(s):  
Volume Source

scholarly journals Validation of EFFTRAN for efficiency transfer to distant geometries and volume sources

2021 ◽  
Author(s):  
H. Ramebäck ◽  
S. Jonsson ◽  
T. Vidmar
Keyword(s):  
Methyl Methacrylate ◽  
Gamma Ray ◽  
Germanium Detector ◽  
Gamma Ray Spectrometry ◽  
Volume Source ◽  
Two Stage ◽  
Poly Methyl Methacrylate ◽  
Fit For Purpose

AbstractThe efficiency transfer procedure from a geometry where a volume source was placed directly on the endcap of a germanium detector to three different distant geometries was carried out using the EFFTRAN code. One of these distant geometries included absorbers consisting of poly(methyl methacrylate). The efficiency transfer to this geometry therefore had to be realized as a two-stage transfer, since a direct efficiency transfer is not possible using EFFTRAN in such a case. Efficiency transfer to all three distant geometries yielded results which can be considered as fit-for-purpose in e.g. most of the applications of gamma ray spectrometry.

Particle simulation on extraction of negative ions from a volume source

1992 ◽  
Author(s):  
Hiroshi Naitou ◽  
Osamu Fukumasa ◽  
Kouji Mutou
Keyword(s):  
Negative Ions ◽  
Particle Simulation ◽  
Volume Source

Effect of cesium on H− production in a field free region of a volume source

1998 ◽  
Vol 69 (2) ◽  
pp. 974-976 ◽  
Author(s):  
M. Nishiura ◽  
M. Sasao ◽  
M. Wada
Keyword(s):  
Volume Source ◽  
Free Region ◽  
Field Free Region

Modeling the heat transfer in geometrically complex media with a volume source

2014 ◽  
Vol 77 (13) ◽  
pp. 1563-1566
Author(s):  
M. I. Gurevich ◽  
O. V. Tel’kovskaya ◽  
B. K. Chukbar ◽  
D. A. Shkarovskiy
Keyword(s):  
Heat Transfer ◽  
Complex Media ◽  
Volume Source ◽  
Geometrically Complex

Surface wave characteristics of a volume source horizontally translating in a stratified fluid

2020 ◽  
Vol 32 (11) ◽  
pp. 116602
Author(s):  
Yuhang Li ◽  
Ke Chen ◽  
Hongwei Wang ◽  
Yunxiang You
Keyword(s):  
Surface Wave ◽  
Stratified Fluid ◽  
Volume Source ◽  
Wave Characteristics

Generalised volume source formulation of diffraction and a sequence of approximations

Wave Motion ◽  
1988 ◽  
Vol 10 (5) ◽  
pp. 453-463
Author(s):  
D.G.H. Tan ◽  
R.H.T. Bates
Keyword(s):  
Volume Source

scholarly journals Tangential-Flow Ultrafiltration with Integrated Inhibition Detection for Recovery of Surrogates and Human Pathogens from Large-Volume Source Water and Finished Drinking Water

2010 ◽  
Vol 77 (1) ◽  
pp. 385-391 ◽  
Author(s):  
Kristen E. Gibson ◽  
Kellogg J. Schwab
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Drinking Water Treatment ◽  
Source Water ◽  
Murine Norovirus ◽  
Human Pathogens ◽  
Volume Source ◽  
Tangential Flow ◽  
Water Treatment Plants ◽  
Human Enteric Viruses

ABSTRACTTangential-flow ultrafiltration was optimized for the recovery ofEscherichia coli,Enterococcus faecalis,Clostridium perfringensspores, bacteriophages MS2 and PRD1, murine norovirus, and poliovirus seeded into 100-liter surface water (SW) and drinking water (DW) samples. SW and DW collected from two drinking water treatment plants were then evaluated for human enteric viruses.

scholarly journals A numerical simulation of the acoustic and elastic wavefields radiated by a source on a fluid‐filled borehole embedded in a layered medium

Geophysics ◽  
1993 ◽  
Vol 58 (4) ◽  
pp. 475-475 ◽  
Author(s):  
Michel Bouchon
Keyword(s):  
Layered Medium ◽  
Borehole Wall ◽  
Stoneley Wave ◽  
Wave Reflections ◽  
Volume Source ◽  
Linear System Of Equations ◽  
Method Of Calculation ◽  
Secondary Sources ◽  
Element Technique ◽  
Discrete Wavenumber Method

We present a method of calculation to simulate the propagation of acoustic and elastic waves generated by a borehole source embedded in a layered medium. The method is formulated as a boundary element technique where the Green’s functions are calculated by the discrete wavenumber method. The restrictive assumptions are that the borehole is cylindrical and that its axis runs normal to the layer interfaces. The physics of the method rely on Huygens’s principle that states that a diffracting boundary—the borehole wall in the present case—can be represented as a distribution of secondary sources. The borehole is discretized into small cylindrical elements and each element is represented by three sources: a volume source representing the wavefield diffracted in the fluid and two surface forces that give rise to the elastic wavefield radiated outside the borehole. The strength of each source is obtained by solving the linear system of equations that describes the boundary conditions at the borehole wall. The method is used to generate synthetic acoustic logs and to investigate the wavefield radiated into the formation. The simulations considered display the Stoneley wave reflections at the bed boundaries and show the importance of the diffraction that takes place where the borehole wall intersects the layer interfaces.

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