Determination of concentration of radioactive gases by a cylindrical counter placed in A finite volume

1971 ◽  
Vol 30 (3) ◽  
pp. 385-387 ◽  
Author(s):  
A. A. Gusev
Keyword(s):  
Finite Volume ◽  
Cylindrical Counter ◽  
Radioactive Gases

Determination of baryon-baryon elastic scattering phase shift from finite volume spectra in elongated boxes

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
Ning Li ◽  
Ya-Jie Wu ◽  
Zhan-Wei Liu
Keyword(s):  
Elastic Scattering ◽  
Phase Shift ◽  
Finite Volume ◽  
Scattering Phase

On the transition from finite-volume negatively buoyant releases to continuous fountains

2012 ◽  
Vol 698 ◽  
pp. 168-184 ◽  
Author(s):  
O. J. Myrtroeen ◽  
G. R. Hunt
Keyword(s):  
Aspect Ratio ◽  
Froude Number ◽  
Finite Volume ◽  
Uniform Density ◽  
Critical Aspect ◽  
Profound Influence ◽  
Rise Height ◽  
Negatively Buoyant

AbstractAn experimental investigation to identify the source conditions that distinguish finite-volume negatively buoyant fluid projectile behaviour from fountain behaviour in quiescent environments of uniform density is described. Finite-volume releases are governed by their source Froude number ${\mathit{Fr}}_{D} $ and the aspect ratio $L/ D$ of the release, where $L$ denotes the length of the column of fluid dispensed vertically from the nozzle of diameter $D$. We establish the influence of $L/ D$ on the peak rise heights of a release formed by dispensing saline solution into fresh water for $0\lesssim {\mathit{Fr}}_{D} \lesssim 6$ and $0\lesssim L/ D\lesssim 34$. Within these ranges, we determine the source conditions for which a flow may be regarded, in terms of the initial rise height attained, as either finite-volume or continuous flux. The critical aspect ratio $ \mathop{ (L/ D)} \nolimits _{f} $, for a given ${\mathit{Fr}}_{D} $, which when exceeded no longer influenced release behaviour, led to the determination of $\{ {\mathit{Fr}}_{D} , \mathop{ (L/ D)} \nolimits _{f} \} $ paired source conditions that give rise to solely Froude-number-dependent, i.e. fountain-like, behaviour. As such, we make the link between finite-volume releases and continuous fountains. The $\{ {\mathit{Fr}}_{D} , \mathop{ (L/ D)} \nolimits _{f} \} $ pairs led us directly to the classification of a $\{ {\mathit{Fr}}_{D} , L/ D\} $ space from which source conditions giving rise to either negatively buoyant projectiles or fountains may be readily identified. The variation of $ \mathop{ (L/ D)} \nolimits _{f} $ with ${\mathit{Fr}}_{D} $ corresponds closely to established fountain regimes of very weak, weak and forced fountains. Moreover, our results indicate that the formation or otherwise of a primary vortex, as fluid is ejected, has a profound influence on the length of the dispensed fluid column that is necessary to achieve rise heights equal to fountain rise heights.

Implementation of a finite-volume method for the determination of effective parameters in fissured porous media

2000 ◽  
Vol 16 (2) ◽  
pp. 237-263 ◽  
Author(s):  
Yannick Caillabet ◽  
Pierre Fabrie ◽  
Pascal Landereau ◽  
Beno�t Noetinger ◽  
Michel Quintard
Keyword(s):  
Porous Media ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Effective Parameters ◽  
Volume Method

scholarly journals Determination of diffusion constants by sorption of solute from a constant, finite volume

1976 ◽  
Vol 20 (9) ◽  
pp. 2557-2560 ◽  
Author(s):  
H. G. Spencer ◽  
J. A. Barrie
Keyword(s):  
Finite Volume ◽  
Diffusion Constants

scholarly journals Electromagnetic corrections to the hadronic vacuum polarization of the photon within QEDL and QEDM

2018 ◽  
Vol 175 ◽  
pp. 06005 ◽  
Author(s):  
Andrea Bussone ◽  
Michele Della Morte ◽  
Tadeusz Janowski
Keyword(s):  
Dispersion Relation ◽  
Finite Volume ◽  
Vacuum Polarization ◽  
Magnetic Moments ◽  
Energy Levels ◽  
Percent Level ◽  
Wilson Loops ◽  
Zero Modes ◽  
Charged Pions

We compute the leading QED corrections to the hadronic vacuum polarization (HVP) of the photon, relevant for the determination of leptonic anomalous magnetic moments, al. We work in the electroquenched approximation and use dynamical QCD configurations generated by the CLS initiative with two degenerate flavors of nonperturbatively O(a)-improved Wilson fermions. We consider QEDL and QEDM to deal with the finite-volume zero modes. We compare results for the Wilson loops with exact analytical determinations. In addition we make sure that the volumes and photon masses used in QEDM are such that the correct dispersion relation is reproduced by the energy levels extracted from the charged pions two-point functions. Finally we compare results for pion masses and the HVP between QEDL and QEDM. For the vacuum polarization, corrections with respect to the pure QCD case, at fixed pion masses, turn out to be at the percent level.

Application of a Two-Fluid Finite Volume Method to Ship Slamming

1999 ◽  
Vol 121 (1) ◽  
pp. 47-52 ◽  
Author(s):  
P. C. Sames ◽  
T. E. Schellin ◽  
S. Muzaferija ◽  
M. Peric
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
North Atlantic ◽  
Water Entry ◽  
Computational Method ◽  
Ship Slamming ◽  
Bow Flare ◽  
Wave Conditions ◽  
Volume Method

A newly developed finite volume method was applied to ship slamming. The computational method accounts for arbitrary free surface deformations and uses unstructured grids for the discretization of the domain. A linear panel method was used to predict motions of a modern 2400 TEU container ship. Resulting relative velocities at the ship’s Keel were used to estimate the maximum vertical re-entry velocities at the bow in North Atlantic wave conditions. Water entry of three bow in North Atlantic wave conditions. Water entry of three bow sections was numerically simulated to determine pressures at the bow flare. Prescribed vertical velocity histories significantly affected the determination of realistic pressure levels.

scholarly journals Determination of the Thickness of a Resistive Material Layer in a Finite Volume Conductor using Focused Impedance Method (FIM) – a simulation study

2015 ◽  
Vol 7 (1) ◽  
pp. 8-23 ◽  
Author(s):  
Golam Dastegir Al-Quaderi ◽  
Sayed Parvez Ahmed ◽  
K Siddique-e Rabbani
Keyword(s):  
Finite Volume ◽  
Simulation Study ◽  
Experimental Work ◽  
Subcutaneous Fat ◽  
Volume Conductor ◽  
Impedance Method ◽  
Resistive Layer ◽  
Material Layer ◽  
Electrode Separation

Focused Impedance Method (FIM) is an innovative and relatively new electrical impedance measurement technique that allows localized measurement of the properties of electrically conducting materials in a volume conductor such as the human body using simple measurement setups. In a previous work, FIM, with dual electrode separation, was used to determine thicknesses of subcutaneous fat layers through experimental study on phantoms and human subjects. The present work, carried out using COMSOL Multiphysics software package, is a finite element simulation study for a similar target object that verifies and extends the results of the previous experimental work. A rectangular box of different heights containing a material of uniform conductivity such as saline together with internally embedded layers of resistive materials of different thicknesses were used for this study. The measured transfer impedance in the FIM method showed marked change with the variation of the thickness of the resistive layer and with electrode separation, showing a point of maximum curvature in the latter. We obtained a calibration curve for the thickness from the electrode separation of this point. This allowed a unique method for the determination of thickness of embedded resistive layers which is more general than what had been done in the previous experimental work. This work will help standardize the application of 4-electrode FIM for determination of the thickness of less-conducting material layer in any finite volume, including determination of fat layer thickness, etc.Bangladesh Journal of Medical Physics Vol.7 No.1 2014 8-23

scholarly journals Study of finite volume effects in the non-perturbative determination of cSW with the SF method in full three-flavor lattice QCD

2004 ◽  
Vol 129-130 ◽  
pp. 444-446 ◽  
Author(s):  
K-I. Ishikawa ◽  
S. Aoki ◽  
M. Fukugita ◽  
S. Hashimoto ◽  
N. Ishizuka ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Finite Volume ◽  
Volume Effects
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