Two-dimensional heat conduction in metal, fluid composites

Download
Author
Gomori, Michael Andrew
Date
1985-12Advisor
Kraus, Allen D.
Wanniarachchi, A.S.
Metadata
Show full item recordAbstract
Filmwise condensation of steam on externally-finned tubes is a very complex process. Recent
experiments have shown that enhancement ratios (ratio of steam-side heat-transfer coefficient to that of a smooth tube having the same diameter) exceeded the area enhancement produced by the fins. Moreover, the enhancement ratios for fully flooded tubes exceeded the values predicted by a simple,
one-dimensional conduction model by a factor of 2 to 4. A new two-dimensional conduction model was developed, which showed that the one-dimensional model overpredicted the two-dimensional results for high conductivity
tube-metals such as copper by as much as 13%.
The two-dimensional model also showed that variations in fin thickness or spacing can result in an overprediction by the one-dimensional model of the two-dimensional results by as much as twenty-two percent.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Area-efficient and volume-efficient algorithms for loading cargo
DeSha, Ernest Larry (Monterey, California; Naval Postgraduate School, 1970-09);The proposed greater reliance upon airlifting military forces demands that cargo loading time be minimized while utilization of aircraft cargo compartment space is maximized. Two loading algorithms have been developed ... -
Prediction of the beamformed acoustic ray arrival structure for the 1992 Barents Sea coastal tomography test
Mykyta, John L. (Monterey, California. Naval Postgraduate School, 1993-12);In an effort to solve the forward propagation problem associated with the 1992 Barents Sea Polar Front Experiment Tomography Test, the transmission of a 224 Hz pulse signal from a near bottom sound source to a vertical ... -
NPSNET: JANUS-3D Providing three-dimensional displays for a traditional combat model
Walter, Jon Curtis; Warren, Patrick Theron (Monterey, California. Naval Postgraduate School, 1992-09);This work involves integrating the Army's existing combat modeling tool, JANUS, with the real-time three-dimensional graphics display offered by NPSNET. The development of a portable software package that can create a ...