NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 1 of 1
Electrical Characteristics of Simulated Tornadoes and Dust Devils
NTRS Full-Text: Click to View  [PDF Size: 240 KB]
Author and Affiliation:
Zimmerman, Michael I.(Oak Ridge Associated Universities, Inc., Greenbelt, MD, United States);
Farrell, William M.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Barth, E. L.
Lewellen, W. S.
Perlongo, N. J.
Jackson, T. L.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: It is well known that tornadoes and dust devils have the ability to accumulate significant, visible clouds of debris. Collisions between sand-like debris species produce different electric charges on different types of grains, which convect along different trajectories around the vortex. Thus, significant charge separations and electric currents are possible, which as the vortex fluctuates over time are thought to produce ULF radiation signatures that have been measured in the field. These electric and magnetic fields may contain valuable information about tornado structure and genesis, and may be critical in driving electrochemical processes within dust devils on Mars. In the present work, existing large eddy simulations of debris-laden tornadoes performed at West Virginia University are coupled with a new debris-charging and advection code developed at Goddard Space Flight Center to investigate the detailed (meter-resolution) fluid-dynamic origins of electromagnetic fields within terrestrial vortices. First results are presented, including simulations of the electric and magnetic fields that would be observed by a near-surface, instrument-laden probe during a direct encounter with a tornado.
Publication Date: Jan 01, 2012
Document ID:
20120016311
(Acquired Nov 29, 2012)
Subject Category: SPACE SCIENCES (GENERAL)
Report/Patent Number: GSFC.ABS.7432.2012
Document Type: Conference Paper
Meeting Information: American Geophysical Union Fall Meeting; 3-7 Dec. 2012; San Francisco, CA; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: TORNADOES; ELECTROMAGNETIC FIELDS; ELECTRIC CHARGE; POLARIZATION (CHARGE SEPARATION); LARGE EDDY SIMULATION; DEBRIS; DUST; COLLISIONS; SIMULATION
Availability Notes: Abstract Only
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: April 09, 2013
Contact Us