Development and assessment of the CONTAIN hybrid flow solver Page: 4 of 8
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
formulation calculates the gravitational head between cells on the assumption that the gas density
in a flow path is the average of the cell densities connected by the flow path. While it gives the
proper behavior in the well-mixed asymptotic limit, this formulation is shown to be unstable with
respect to recirculating flows. The donor-based hybrid formulation, however, is shown to be
consistent with the momentum equation, to give the correct behavior in the well-mixed
asymptotic limit, and to treat properly the stability of stratifications, within the usual lumped-
parameter assumption that momentum convection can be neglected. A more complete discussion
of the hybrid formulation is given by Murata and Stamps.
Other modeling limitations besides the neglect of momentum convection could enter into the
discrepancy between the code predictions and experiments. These other limitations are discussed
and include the lack of proper plume or jet entrainment models and the lack of modeling of
diffusion processes across gas-gas interfaces. The impact of these limitations on the predicted
results for each experiment is discussed.
An important class of stratifications for containment analysis is the fully developed stratification.
These are stratifications that are formed by plumes or stable buoyant jets, that satisfy the one-
dimensional criteria given by Peterson5 and that have had time to mix down to the injection
elevation of the plume or jet. Such stratifications may be treated zero-dimensionally, without
need for a proper plume or jet entrainment model.-2-
Upcoming Pages
Here’s what’s next.
Search Inside
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Murata, K. K. & Stamps, D. W. Development and assessment of the CONTAIN hybrid flow solver, article, June 20, 1997; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc691188/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.