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Title: LNG SAFETY RESEARCH: FEM3A MODEL DEVELOPMENT

Abstract

The objective of this report is to develop the FEM3A model for application to general scenarios involving dispersion problems with obstacles and terrain features of realistic complexity, and for very low wind speed, stable weather conditions as required for LNG vapor dispersion application specified in 49 CFR 193. The dispersion model DEGADIS specified in 49 CFR 193 is limited to application for dispersion over smooth, level terrain free of obstacles (such as buildings, tanks, or dikes). There is a need for a dispersion model that allows consideration of the effects of terrain features and obstacles on the dispersion of LNG vapor clouds. Project milestones are: (1) Simulation of Low-Wind-Speed Stable Atmospheric Milestones Conditions; (2) Verification for Dispersion over Rough Surfaces, With And Without Obstacles; and (3) Adapting the FEM3A Model for General Application. Results for this quarter are work continues to underway to address numerical problems during simulation of low-wind-speed, stable, atmospheric conditions with FEM3A. Steps 1 and 2 in the plan outlined in the first Quarterly report are complete and steps 3 and 4 are in progress. During this quarter, we have been investigating the effect upon numerical stability of the heat transfer model used to predict the surface-to-cloudmore » heat transfer, which can be important for LNG vapor dispersion. Previously, no consideration has been given to ground cooling as a result of heat transfer to the colder gas cloud in FEM3A. The present effort is directed to describing the ground surface temperature decrease as a function of time.« less

Authors:
;
Publication Date:
Research Org.:
Gas Technology Institute (US)
Sponsoring Org.:
(US)
OSTI Identifier:
840958
DOE Contract Number:  
FG26-04NT42030
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 10 May 2005
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; LIQUEFIED NATURAL GAS; F CODES; GAS SPILLS; ENVIRONMENTAL TRANSPORT; HEAT TRANSFER; SAFETY; COMPUTERIZED SIMULATION; WEATHER; COMPLEX TERRAIN

Citation Formats

Havens, Jerry, and Salehi, Iraj A. LNG SAFETY RESEARCH: FEM3A MODEL DEVELOPMENT. United States: N. p., 2005. Web. doi:10.2172/840958.
Havens, Jerry, & Salehi, Iraj A. LNG SAFETY RESEARCH: FEM3A MODEL DEVELOPMENT. United States. https://doi.org/10.2172/840958
Havens, Jerry, and Salehi, Iraj A. 2005. "LNG SAFETY RESEARCH: FEM3A MODEL DEVELOPMENT". United States. https://doi.org/10.2172/840958. https://www.osti.gov/servlets/purl/840958.
@article{osti_840958,
title = {LNG SAFETY RESEARCH: FEM3A MODEL DEVELOPMENT},
author = {Havens, Jerry and Salehi, Iraj A},
abstractNote = {The objective of this report is to develop the FEM3A model for application to general scenarios involving dispersion problems with obstacles and terrain features of realistic complexity, and for very low wind speed, stable weather conditions as required for LNG vapor dispersion application specified in 49 CFR 193. The dispersion model DEGADIS specified in 49 CFR 193 is limited to application for dispersion over smooth, level terrain free of obstacles (such as buildings, tanks, or dikes). There is a need for a dispersion model that allows consideration of the effects of terrain features and obstacles on the dispersion of LNG vapor clouds. Project milestones are: (1) Simulation of Low-Wind-Speed Stable Atmospheric Milestones Conditions; (2) Verification for Dispersion over Rough Surfaces, With And Without Obstacles; and (3) Adapting the FEM3A Model for General Application. Results for this quarter are work continues to underway to address numerical problems during simulation of low-wind-speed, stable, atmospheric conditions with FEM3A. Steps 1 and 2 in the plan outlined in the first Quarterly report are complete and steps 3 and 4 are in progress. During this quarter, we have been investigating the effect upon numerical stability of the heat transfer model used to predict the surface-to-cloud heat transfer, which can be important for LNG vapor dispersion. Previously, no consideration has been given to ground cooling as a result of heat transfer to the colder gas cloud in FEM3A. The present effort is directed to describing the ground surface temperature decrease as a function of time.},
doi = {10.2172/840958},
url = {https://www.osti.gov/biblio/840958}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 10 00:00:00 EDT 2005},
month = {Tue May 10 00:00:00 EDT 2005}
}