Models the Electromagnetic Response of a 3D Distribution using MP COMPUTERS

Software · Sat May 01 04:00:00 EDT 1999

OSTI ID:1230623

Newman, Gregory A.

EM3D models the electromagnetic response of a 3D distribution of conductivity, dielectric permittivity and magnetic permeability within the earth for geophysical applications using massively parallel computers. The simulations are carried out in the frequency domain for either electric or magnetic sources for either scattered or total filed formulations of Maxwell''s equations. The solution is based on the method of finite differences and includes absorbing boundary conditions so that responses can be modeled up into the radar range where wave propagation is dominant. Recent upgrades in the software include the incorporation of finite size sources, that in addition to dipolar source fields, and a low induction number preconditioner that can significantly reduce computational run times. A graphical user interface (GUI) is bundled with the software so that complicated 3D models can be easily constructed and simulated with the software. The GUI also allows for plotting of the output.

• Short Name / Acronym: EM3D.MP; 001294MLTPL00
• Version: 00
• Programming Language(s): Medium: X; OS: UNIX; Other: WORKSTATION
• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: P
• OSTI ID: 1230623
• Country of Origin: United States