- Author
-
Baum, H. R.
|
Rockett, J. A.
- Title
- Investigation of the Forced Ventilation in Containership Holds.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Coast Guard, Washington, DC
- Report
-
NBSIR 83-2665,
May 1983,
175 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
cargo ships
|
hazardous materials
|
models
|
stratified flow
|
ventilation
- Abstract
- An analysis of the fluid flow and mass transfer induced by ventilation systems in containership holds was carried out. The work was performed in support of the U.S. position before a committee of the International Convention on Safety to Life at Sea. The analysis consists of a detailed calculation of the forced motion through an interconnected set of narrow, stably stratified vertical air passages which represent an idealized containership holds the results of this calculation are then used in a study of the concentration boundary layers formed by the pickup of spill material assumed to lie at the bottoms of the air passages. The result is a set of formulae which determine the rate of extraction of spill material as a function of hold geometery, ventilation parameters, and ambient stratification. The results are incorporated in a computer program which is described in detail. A variety of computed results are presented, together with a listing of the program. The results indicate the crucial importance of locating the extractor as close to the hold bottom as technically possible.