Open Science Research Excellence
@article{(International Science Index):http://waset.org/publications/10000076,
  title    = {Analysis of Combined Heat Transfer through the Core Materials of VIPs with Various Scattering Properties},
  author    = {Jaehyug Lee and  Tae-Ho Song},
  country   = {Korea, Republic Of},
  institution={Korea Advanced Institute of Science and Technology},
  abstract  = {Vacuum Insulation Panel (VIP) can achieve very low
thermal conductivity by evacuating its inner space. Heat transfer in the
core materials of highly-evacuated VIP occurs by conduction through
the solid structure and radiation through the pore. The effect of various
scattering modes in combined conduction-radiation in VIP is
investigated through numerical analysis. The discrete ordinates
interpolation method (DOIM) incorporated with the commercial code
FLUENT® is employed. It is found that backward scattering is more
effective in reducing the total heat transfer while isotropic scattering is
almost identical with pure absorbing/emitting case of the same optical
thickness. For a purely scattering medium, the results agrees well with
additive solution with diffusion approximation, while a modified term
is added in the effect of optical thickness to backward scattering is
employed. For other scattering phase functions, it is also confirmed
that backwardly scattering phase function gives a lower effective
thermal conductivity. Thus the materials with backward scattering
properties, with radiation shields are desirable to lower the thermal
conductivity of VIPs.
},
    journal   = {International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering},  volume    = {9},
  number    = {1},
  year      = {2015},
  pages     = {12 - 15},
  ee        = {http://waset.org/publications/10000076},
  url       = {http://waset.org/Publications?p=97},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 97, 2015},
}