Discrete Velocity Method for Simulating Rarefied Gas Flows with Plasma

Metadata Updated: July 17, 2020

I am proposing to develop a low cost computational method capable of simulating conditions during atmospheric reentry, where the flow is rarefied and ionized. To do so, I intend to modify an existing discrete velocity method (DVM) so it can handle electric and magnetic fields, as well as charged particles (ions and electrons). DVM is a Boltzmann equation (governing equation for flows where the motion of individual molecules must be considered) solver that restricts particle velocities to a finite set of values. The DVM in its current state is capable of modeling ions and electrons as another particle species. Chemical reactions that generate these particles will be added into the code. Electric and magnetic field calculations will be accomplished by a numerical solver. Code efficiency will be improved primarily through the implementation of adaptive velocity, spatial, and internal energy grids. This means that the resolution for these values can be adjusted on the fly. Doing so allows for improved solution quality only in flow regions of interest, minimizing the cost associated with the higher quality solution. Development of a low cost method for simulating atmospheric reentry conditions will allow us to better develop vehicles capable of operating in these conditions. Current computational methods for simulating rarefied gas flows require supercomputers and are not suited for handling trace species that have a significant impact on the flow. The DVM I propose to modify only requires a single core and is capable of simulating trace species accurately, This proposal addresses objectives in NASA's Entry, Descent, and Landing Technology Roadmap, specifically TA09.4.5.12, TA09.4.5.2, and TA09.4.5.6.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_88483
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id e4f0e87a-0441-4fa0-91be-843693afc590
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2020-09-01
Homepage URL https://techport.nasa.gov/view/88483
Data Last Modified 2020-01-29
Program Code 026:027
Source Datajson Identifier True
Source Hash bd482c5f15161819a7f07cddbeacc5a4e7b19e2b
Source Schema Version 1.1

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