Some Observations On The Effect Of Turbulence Modeling In Numerical Simulations Of Multiple-Burst Flow Fields

Item

Title
Some Observations On The Effect Of Turbulence Modeling In Numerical Simulations Of Multiple-Burst Flow Fields
Report Number
CONF-8305107, p. 42-47
Creator
Chapyak, E. J.
Corporate Author
Energy Division, Los Alamos National Laboratory
Laboratory
Lawrence Livermore National Laboratory
Date
1983
Date Issued
1983-07
Extent
6
Identifier
ADA132780
Format
1 online resource (6 pages : ill.)
Abstract
We describe some preliminary attempts to calculate the development of a simple class of axisymmetric multiple-burst environments. Our primary interest is in the intermediate time regime, during which the characteristic plume structures stabilize and begin to spread horizontally. Employing a standard two-equation description of turbulent entrainment, we find that the maximum extent of plume penetration into the atmosphere is sensitive to details of the turbulence modeling. Some interesting dynamic features of the plume stabilization process are also observed. These results are discussed together with supporting analysis and used to identify generic differences between single-and multiple- burst environments.
Description
We describe some preliminary attempts to calculate the development of a simple class of axisymmetric multiple-burst environments. Our primary interest is in the intermediate time regime, during which the characteristic plume structures stabilize and begin to spread horizontally. Employing a standard two-equation description of turbulent entrainment, we find that the maximum extent of plume penetration into the atmosphere is sensitive to details of the turbulence modeling. Some interesting dynamic features of the plume stabilization process are also observed. These results are discussed together with supporting analysis and used to identify generic differences between single-and multiple- burst environments.
Distribution Classification
1
Distribution Conflict
No
DTIC Record Exists
No
Illinois Tech Related
No
Photo Quality
Not Needed
Report Availability
Full text available
Type
article
Is Part Of
Proceedings: 17th Asilomar Conference on Fire and Blast Effects of Nuclear Weapons
Media
article07