Transient characteristics of He II forced flow heated at the center of a pipe line

✍ Scribed by Y.F. Rao; Y. Inaba; T. Noda; K. Fukuda

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 706 KB
• Volume: 36
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(96)81616-x

✦ Synopsis

Numerical analysis is performed with the two-fluid model and the simplified model of Kashani et al. to study one-dimensional forced convection heat transfer of He II in a pipe heated at the midpoint along its length. An entropy transport equation derived from the theory of Khalatn~tkov is incorporated into the two-fluid model. The numerical results obtained with the two models are compared with each other and with experimental data to investigate the validity of the models. In the range of parameters of concern in this paper, good agreement is observed for temperature distributions and internal convection heat fluxes obtained numerically and experimentally. Explanation is provided for the relationship between the two-fluid model and the simpli~ed model. Conditions are discussed under which the simplified model will produce results that are in close agreement with the two-fluid model. Some interesting characteristics of transient flow and heat transfer are also presented.