Numerical Solution of Natural Convection in Eccentric Annuli Page: 4 of 33
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
years. Natural convection heat transfer in eccentric annuli occurs
in many industrial situations. Such problems commonly occur within
the electric and nuclear energy fields, as well as in solar energy
and thermal storage systems. For example, the cooling of under-
ground electric transmission cables is significantly affected by
the position of the inner cable within the outer housing. Simi-
larly, the cooling of nuclear fuel and target tube assemblies
following irradiation must be carefully monitored in the event of
assembly burnout due to inner tubular eccentricities. Likewise,
natural convection cooling of casks containing nuclear waste can
exceed thermal guidelines if positioning becomes overly eccentric.
In this study free convection flow within an eccentric annulus is
numerically solved using bipolar coordinate transformation and one-
dimensional finite element and pseudospectral algorithms. Steady
state results are compared with existing theoretical and experi-
Forced convection in eccentric annuli was investigated by
Trombetta5 using approximation methods and a least squares tech-
nique for various radius ratios and eccentricity. Similar studies
for laminar flow through an eccentric annulus was made by Guckes.6
Both Newtonian and non-Newtonian fluid flows were calculated using
bipolar coordinates and a finite difference technique. An ana-
lytical study of free convection in eccentric annuli was conducted
by Yao,7 using perturbation techniques with the eccentric space
- 2 -
Here’s what’s next.
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.
Pepper, D.W. Numerical Solution of Natural Convection in Eccentric Annuli, article, September 18, 2001; South Carolina. (digital.library.unt.edu/ark:/67531/metadc719508/m1/4/: accessed January 21, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.