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Axi-symmetric simulation of a two phase vertical thermosyphon using Eulerian two-fluid methodology

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Abstract

Numerical simulation of steady state operation of a vertical two phase closed thermosyphon is performed using the two-fluid methodology within Eulerian multiphase domain. A full scale axi-symmetric model is developed for computational fluid dynamics simulation of thermosyphon using ANSYS/FLUENT 13.0. The effects of evaporation, condensation and interfacial heat and mass transfer are taken into account within the whole domain. Cooling water jacket is also modelled along with the wall of thermosyphon to simulate the effect of conjugate heat transfer between the wall and fluid phase. The results obtained are presented and compared with available experimental investigations for a similar thermosyphon. It is established that two-fluid methodology can be used effectively for the purpose of simulation of two phase system like a typical thermosyphon.

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Abbreviations

c :

Relaxation time (s−1)

g:

Gravitational acceleration (m s−2)

H :

Interfacial heat transfer coefficient (W m−3 K−1)

h :

Specific enthalpy (J kg−1)

L:

Latent heat (J kg−1)

\(\dot{m}\) :

Interfacial mass transfer (kg m−3 s−1)

p:

Pressure (kg m−1 s−2)

q :

Heat flux (J m−2 s−1)

S :

Mass source term (kg m−3 s−1)

t:

Time (s)

T :

Temperature (K)

v :

Velocity (m s−1)

V :

Cell volume (m3)

α:

Volume fraction

β:

Thermal expansion coefficient (K−1)

ρ:

Density (kg m−3)

a:

General phase

eff:

Effective

l :

Liquid phase

lv :

Liquid–vapor

m :

Phase mixture

o:

Operating conditions

v :

Vapor

vl :

Vapor–liquid

sat :

Saturation

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Authors and Affiliations

  1. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester, UK

    Khurram Kafeel & Ali Turan

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  1. Khurram Kafeel
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  2. Ali Turan
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Correspondence to Khurram Kafeel.

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Kafeel, K., Turan, A. Axi-symmetric simulation of a two phase vertical thermosyphon using Eulerian two-fluid methodology. Heat Mass Transfer 49, 1089–1099 (2013). https://doi.org/10.1007/s00231-013-1155-6

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  • DOI: https://doi.org/10.1007/s00231-013-1155-6

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