Abstract
This study deals with the numerical investigation of combined heat transfer by conduction, turbulent natural convection, and surface thermal radiation in a closed square air-filled cavity with a local radiant heater. The turbulent flow was computed within the quasi (pseudo) direct numerical simulation approach. The governing equations were solved by means of the finite difference method. Developed numerical code was validated by comparison of temperature profiles obtained experimentally and numerically. The effect of time, buoyancy force, walls emissivity, and emitter height on local and mean heat transfer characteristics was studied. For the first time it was found that the mean convective Nusselt number at the bottom solid-fluid interface was slightly altered in the cavity with the local radiant heater when varying the governing parameters. An increase in the Rayleigh number led to a significant rise in the overall temperature. The isotherms and streamlines were significantly altered with time. However, the mean radiative Nusselt number was slightly changed over the time.
| Original language | English |
|---|---|
| Pages (from-to) | 27-39 |
| Number of pages | 13 |
| Journal | International Journal of Thermal Sciences |
| Volume | 131 |
| DOIs | |
| Publication status | Published - 1 Sep 2018 |
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Keywords
- Conduction
- Finite difference method
- Radiant heater
- Surface radiation
- Turbulent natural convection
ASJC Scopus subject areas
- Condensed Matter Physics
- Engineering(all)
Cite this
Mathematical modelling of conjugate heat transfer and fluid flow inside a domain with a radiant heating system. / Kuznetsov, G. V.; Kurilenko, N. I.; Nee, A. E.
In: International Journal of Thermal Sciences, Vol. 131, 01.09.2018, p. 27-39.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mathematical modelling of conjugate heat transfer and fluid flow inside a domain with a radiant heating system
AU - Kuznetsov, G. V.
AU - Kurilenko, N. I.
AU - Nee, A. E.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - This study deals with the numerical investigation of combined heat transfer by conduction, turbulent natural convection, and surface thermal radiation in a closed square air-filled cavity with a local radiant heater. The turbulent flow was computed within the quasi (pseudo) direct numerical simulation approach. The governing equations were solved by means of the finite difference method. Developed numerical code was validated by comparison of temperature profiles obtained experimentally and numerically. The effect of time, buoyancy force, walls emissivity, and emitter height on local and mean heat transfer characteristics was studied. For the first time it was found that the mean convective Nusselt number at the bottom solid-fluid interface was slightly altered in the cavity with the local radiant heater when varying the governing parameters. An increase in the Rayleigh number led to a significant rise in the overall temperature. The isotherms and streamlines were significantly altered with time. However, the mean radiative Nusselt number was slightly changed over the time.
AB - This study deals with the numerical investigation of combined heat transfer by conduction, turbulent natural convection, and surface thermal radiation in a closed square air-filled cavity with a local radiant heater. The turbulent flow was computed within the quasi (pseudo) direct numerical simulation approach. The governing equations were solved by means of the finite difference method. Developed numerical code was validated by comparison of temperature profiles obtained experimentally and numerically. The effect of time, buoyancy force, walls emissivity, and emitter height on local and mean heat transfer characteristics was studied. For the first time it was found that the mean convective Nusselt number at the bottom solid-fluid interface was slightly altered in the cavity with the local radiant heater when varying the governing parameters. An increase in the Rayleigh number led to a significant rise in the overall temperature. The isotherms and streamlines were significantly altered with time. However, the mean radiative Nusselt number was slightly changed over the time.
KW - Conduction
KW - Finite difference method
KW - Radiant heater
KW - Surface radiation
KW - Turbulent natural convection
UR - http://www.scopus.com/inward/record.url?scp=85047398774&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047398774&partnerID=8YFLogxK
U2 - 10.1016/j.ijthermalsci.2018.05.010
DO - 10.1016/j.ijthermalsci.2018.05.010
M3 - Article
VL - 131
SP - 27
EP - 39
JO - International Journal of Thermal Sciences
JF - International Journal of Thermal Sciences
SN - 1290-0729
ER -