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Turner, C. David

Publications and source records attributed to Turner, C. David.

10 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2019

EMPHASIS™/Nevada Unstructured FEM Implementaiton Version 2.1.3. Description, verification, and validation

EMPHASIS™/NEVADA is the SIERRA/NEVADA toolkit implementation of portions of the EMPHASIS TM code suite. The purpose of the toolkit implementation is to facilitate coupling to other physics drivers such as radiation transport as well as to better manage code design, implementation, complexity, and important verification and validation processes. This document describes the theory and implementation of the unstructured finite- element method solver, associated algorithms, and selected verification and validation.

70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗
DOE OSTI2019

EMPHASIS™/Nevada CABANA User Guide Version 2.1.3

The CABle ANAlysis (CABANA) portion of the EMPHASIS™ suite is designed specifically for the simulation of cable SGEMP. The code can be used to evaluate the response of a specific cable design to threat or to compare and minimize the relative response of difference designs. This document provides user-specific information to facilitate the application of the code to cables of interest.

42 ENGINEERING↗
DOE OSTI2019

EMPHASIS™/Nevada UTDEM User Guide Version 2.1.3

The Unstructured Time-Domain ElectroMagnetics (UTDEM) portion of the EMPHASIS suite solves Maxwell's equations using finite-element techniques on unstructured meshes. This document provides user-specific information to facilitate the use of the code for applications of interest.

42 ENGINEERING↗
DOE OSTI2017

EMPHASIS™/Nevada CABANA User Guide Version 2.1.2

The CABle ANAlysis (CABANA) portion of the EMPHASIS™ suite is designed specifically for the simulation of cable SGEMP. The code can be used to evaluate the response of a specific cable design to threat or to compare and minimize the relative response of difference designs. This document provides user-specific information to facilitate the application of the code to cables of interest.

97 MATHEMATICS AND COMPUTING↗
DOE OSTI2017

EMPHASIS™/Nevada UTDEM User Guide Version 2.1.2

The Unstructured Time-Domain ElectroMagnetics (UTDEM) portion of the EMPHASIS suite solves Maxwell’s equations using finite-element techniques on unstructured meshes. This document provides user-specific information to facilitate the use of the code for applications of interest.

97 MATHEMATICS AND COMPUTING↗
DOE OSTI2017

Electromagnetic pulse excitation of finite- and infinitely-long lossy conductors over a lossy ground plane

This study details a model for the response of a finite- or an infinite-length wire interacting with a conducting ground to an electromagnetic pulse excitation. We develop a frequency–domain method based on transmission line theory that we name ATLOG – Analytic Transmission Line Over Ground. This method is developed as an alternative to full-wave methods, as it delivers a fast and reliable solution. It allows for the treatment of finite or infinite lossy, coated wires, and lossy grounds. The cases of wire above ground, as well as resting on the ground and buried beneath the ground are treated. The reported method is general and the time response of the induced current is obtained using an inverse Fourier transform of the current in the frequency domain. The focus is on the characteristics and propagation of the transmission line mode. Comparisons with full-wave simulations strengthen the validity of the proposed method.

25 ENERGY STORAGE↗