Printer Friendly

Exploring the virtual wind.

Calculations of the direction and speed at which air flows past a complicated, three-dimensional object, such as an airplane, generate huge quantities of data. Conventional two-dimensional graphic images derived from these data often fail to convey the flow's complexity. Now, a team of researchers has assembled a primitive, prototype system for exploring such flow patterns, in effect allowing an investigator to step into and interact with a computer-generated environment.

Steve Bryson and Creon Levit of the NASA Ames Research Center in Mountain View, Calif., used commercially available components to create their prototype system, known as the Virtual Windtunnel.

Through computer graphics and special input devices, the system creates the illusion of being surrounded by a flow. The user looks through a boom-mounted device resembling a diver's mask, which contains two small television sets to produce a wide-angle, stereoscopic image. A computer tracks the viewer's head position and generates the appropriate views. The user also wears a flexible glove fitted with sensors to manipulate the image in various ways. For example, to visualize the direction of flow in a particular region, a researcher can use the glove to specify the starting point for a computer-rendered stream of smoke, and then walk around to see the resulting flow pattern from different angles.

"It puts the computations right in front of the researcher," Bryson says. "It allows real interaction with the data."
COPYRIGHT 1991 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1991, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:computer graphics for research on air flow patterns
Author:Peterson, Ivars
Publication:Science News
Date:Jun 22, 1991
Previous Article:Navigating the information swamp.
Next Article:Drugs slash stroke risk for elderly.

Related Articles
On the wings of a dragonfly; the way a dragonfly flies may inspire new aircraft designs.
Rise of Tibet and Rockies set ice-age stage.
The color of geometry: computer graphics adds a vivid new dimension to geometric investigations.
Dynamics of weather fueled by plankton.
Looking-glass world: learning to assemble the machinery of illusion.
Environmental ideals.
Immersion for analyzing complex software.
Two by Dwyer.
A Better Way to Measure the Effect of Pollution on Human Lungs.
NIST immersive visualization environment available. (News Briefs).

Terms of use | Copyright © 2016 Farlex, Inc. | Feedback | For webmasters