One-dimensional numerical methods for the simulation of liquefied gaseous fuel spills [electronic resource].

Published:: Livermore, Calif : Lawrence Livermore National Laboratory, 1982.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: 29 : digital, PDF file
Additional Creators:: Lawrence Livermore National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

A simplified moving grid scheme has been developed and applied to a system of six partial differential equations (PDEs) which describe the dispersion of a dense natural gas cloud resulting from a spill of liquefied natural gas (LNG). The grid velocity at each point is determined by the physics represented by the governing PDEs. A grid velocity is sought which transforms the PDEs into a system of ordinary differential equations (ODEs) in a least-squares sense. No constraints were placed upon gradients. In the event of a zero gradient, singular matrix decomposition was applied. Likewise, no constraints were placed on grid velocity. Problems of grid tangling and/or violation of minimum point separation were handled by a regridding scheme. Results are presented using 21 grid points. Shock formation is well resolved. A comparable spatial resolution in a fixed-frame calculation would have required in excess of 500 grid points.

Report Numbers:

E 1.99:ucrl-87259
E 1.99: conf-821106-18
conf-821106-18
ucrl-87259

Subject(s):

Other Subject(s):

Note:

Published through SciTech Connect.
09/01/1982.
"ucrl-87259"
" conf-821106-18"
"DE83002496"
Annual meeting of heat transfer and energy conversion, Los Angeles, CA, USA, 14 Nov 1982.
Kansa, E.J.; Morgan, D.L. Jr.

Funding Information:

W-7405-ENG-48

View MARC record | catkey: 14149327