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Vapour dynamics of heat pipe start-up.

Author(s) : ISSACCI F., CATTON I., GHONIEM N. M.

Type of article: Article

Summary

The vapour flow is modeled by a two-dimensional, compressible viscous flow in an enclosure with inflow and outflow boundary conditions. For high-input heat fluxes, a compression wave is created in the evaporator early in the operation. A nonlinear filtering technique, along with the centered difference scheme, is used to capture the shocklike wave and overcome the cell Reynolds number problem. Multiple wave reflections are observed in the evaporation and adiabatic regions. These wave reflections cause a significant increase in the local pressure and flow circulations, which grow with time. Although the pressure drops converge to a constant value at steady state, they are significantly higher than their steady-state value at the initiation of the process.

Details

  • Original title: Vapour dynamics of heat pipe start-up.
  • Record ID : 1992-2644
  • Languages: English
  • Source: J. Heat Transf. - vol. 113 - n. 4
  • Publication date: 1991/11
  • Document available for consultation in the library of the IIR headquarters only.

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