Heat-transfer characteristics of flowing and stationary particle-bed-type fusion-reactor blankets Page: 4 of 282
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HEAT TRANSFER CHARACTERISTICS OF FLOWING AND STATIONARY
PARTICLE BED TYPE FUSION REACTOR BLANKETS
Russell E. Nietert
Under the supervision of Professor S. I. Abdel-Khalik
The heat-transfer characteristics of flowing and stationary packed-
particle beds have recently become of interest in connection with
conceptual designs of fusion-reactor blankets. A detailed literature
survey has shown that the processes taking place in such beds are not
fully understood despite their widespread use in the chemical industry
and other engineering disciplines for more than five decades. In this
study, two experimental investigations were pursued.
In the first, a heat-transfer loop was constructed through which
glass microspheres were allowed to flow by gravity at controlled rates
through an electrically heated stainless steel tubular test section.
The falling bed was treated as a pseudofluid and extensive data for
the local convective heat-transfer coefficient and Nusselt number were
obtained for the thermal-entrance region of heated tubes. Comparisons
were made with theoretical predictions based upon a fully developed
flat-velocity-profile assumption. Several predictions of the static
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Nietert, R.E. Heat-transfer characteristics of flowing and stationary particle-bed-type fusion-reactor blankets, report, February 1, 1983; [Livermore,] California. (https://digital.library.unt.edu/ark:/67531/metadc1113214/m1/4/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.