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Title: Isotropic Standard Poisson in 3D v. 1.0

Abstract

Finite element solution to the Poisson Equation for electrostatic potntials in an isotropic electrically conducting medium.

Authors:
 [1]
  1. Sandia National Laboratories
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1373354
Report Number(s):
ISPI3D v.1.0; 005386MLTPL00
SCR# 2230
DOE Contract Number:
AC04-94AL85000
Resource Type:
Software
Software Revision:
00
Software Package Number:
005386
Software CPU:
MLTPL
Source Code Available:
Yes
Country of Publication:
United States

Citation Formats

Weiss, Chester J. Isotropic Standard Poisson in 3D v. 1.0. Computer software. Vers. 00. USDOE. 17 Jul. 2017. Web.
Weiss, Chester J. (2017, July 17). Isotropic Standard Poisson in 3D v. 1.0 (Version 00) [Computer software].
Weiss, Chester J. Isotropic Standard Poisson in 3D v. 1.0. Computer software. Version 00. July 17, 2017.
@misc{osti_1373354,
title = {Isotropic Standard Poisson in 3D v. 1.0, Version 00},
author = {Weiss, Chester J.},
abstractNote = {Finite element solution to the Poisson Equation for electrostatic potntials in an isotropic electrically conducting medium.},
doi = {},
year = 2017,
month = 7,
note =
}

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  • Amplitude interpretation is a seismic technique that has proven to be an effective tool in oil reservoir delineation, particularly in development areas. Amplitude variation with offset is a commonly used method in amplitude interpretation. It can distinguish a hydrocarbon bearing sand reservoir from a water bearing reservoir. The well-known simplifications by Shuey of Zoeppritz`s equation is widely used in interpretation. It assumes that the media involved are isotropic. Blangy provided an expression for reflection coefficients in the presence of anisotropy. This is expressed in terms of the phase angle which does not correspond to the conventional angle of incidence obtainedmore » directly from ray path geometry. Poison`s ratio also becomes directionally dependent in anisotropic media. This paper presents the results of physical modelling of seismic reflection, where the upper medium is transversely isotropic with a vertical axis of symmetry. The second layer consisted of various water saturated sand bodies, and a high speed dry solid. Reflection amplitudes were compared with the theoretically predicted values from Blangy`s formula. For this to be done, it is necessary to use the angle of incidence defined in terms of the anisotropic phase velocity direction, rather than the geometrically determined ray angle. This was accurately achieved once the elastic constants of the anisoropic layer were determined by the method of Okoye et al. The results of these experiments show the relationship between the difference of the Poisson`s ratio and the reflection coefficients on the interface. These relationships then can be used to provide amplitude interpretation more accurately.« less
  • The Los Alamos Accelerator Theory and Simulation Group (AT-6) maintains and distributes a standard version of the Poisson-Group codes (LATTICE, AUTOMESH, TEKPLOT, POISSON, PANDIRA, MIRT, FORCE, SUPERFISH, and SF01). These codes are the product of man-decades of development under the guidance of R.F. Holsinger and K. Halbach. The main applications are in the design of electromagnets (POISSON and PANDIRA) and rf cavities (SUPERFISH). Other applications include electrostatics heat transport, and finding mathematical surfaces of minimum area. With special financial support from DOE-HEP, we have revised and corrected the standard version and are writing a comprehensive manual containing many examples andmore » a summary of the theory behind the codes. This paper will illustrate some of the capabilities of the codes and will summarize the manual. The revised codes are available upon request. 3 figs., 2 tabs.« less
  • The Los Alamos Accelerator Theory and Simulation Group (AT-6) maintains and distributes a standard version of the Poisson-Group codes (LATTICE, AUTOMESH, TEKPLOT, POISSON, PANDIRA, MIRT, FORCE, SUPERFISH, and SFO1). These codes are the product of man-decades of development under the guidance of R.F. Holsinger and K. Halbach. The main applications are in the design of electromagnets (POISSON and PANDIRA) and rf cavities (SUPERFISH). Other applications include electrostatics, heat transport, and finding mathematical surfaces of minimum area. With special financial support from DOE-HEP, we have revised and corrected the standard version and are writing a comprehensive manual containing many examples andmore » a summary of the theory behind the codes. This paper illustrates some of the capabilities of the codes and summarizes the manual. The revised codes are available upon request.« less

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