Abstract
The present study investigates the influence of variable viscosity of temperature-dependent fluids on the laminar heat transfer and friction factor in a 2:1 rectangular duct. The H1 thermal boundary condition corresponding to axially constant heat flux and peripherally constant temperature was adopted for a top-wall-heated configuration. The governing conservation equations of mass, momentum, and energy were solved using a finite volume method, and the range of the Prandtl number was from 7 to 15000. The present numerical results of local Nusselt numbers for oil showed 70-80% enhancement over those of a constant property fluid and 40-50% enhancement over water, and gave excellent agreement with recent experimental results [Int. J. Heat Mass Transfer 35, 641-648 (1992)]. The heat transfer enhancement from the heated top wall was due to an increased velocity gradient near the wall. The study proposes a new correlation for local Nusselt numbers in the 2:1 rectangular duct, which covers both thermally developing and thermally fully developed regions. Consequently, a temperature-dependent viscous fluid with a non-circular duct is proposed for use in the design of a liquid cooling module for the computer industry and in compact heat exchangers in general.
| Original language | English |
|---|---|
| Pages (from-to) | 4365-4373 |
| Number of pages | 9 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 36 |
| Issue number | 18 |
| Publication status | Published - 1993 Dec 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Energy(all)
- Engineering(all)
- Mechanical Engineering
Cite this
Numerical study of laminar heat transfer with temperature dependent fluid viscosity in a 2 : 1 rectangular duct. / Shin, Sehyun; Cho, Young I.; Gringrich, William K.; Shyy, Wei.
In: International Journal of Heat and Mass Transfer, Vol. 36, No. 18, 01.12.1993, p. 4365-4373.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Numerical study of laminar heat transfer with temperature dependent fluid viscosity in a 2
T2 - 1 rectangular duct
AU - Shin, Sehyun
AU - Cho, Young I.
AU - Gringrich, William K.
AU - Shyy, Wei
PY - 1993/12/1
Y1 - 1993/12/1
N2 - The present study investigates the influence of variable viscosity of temperature-dependent fluids on the laminar heat transfer and friction factor in a 2:1 rectangular duct. The H1 thermal boundary condition corresponding to axially constant heat flux and peripherally constant temperature was adopted for a top-wall-heated configuration. The governing conservation equations of mass, momentum, and energy were solved using a finite volume method, and the range of the Prandtl number was from 7 to 15000. The present numerical results of local Nusselt numbers for oil showed 70-80% enhancement over those of a constant property fluid and 40-50% enhancement over water, and gave excellent agreement with recent experimental results [Int. J. Heat Mass Transfer 35, 641-648 (1992)]. The heat transfer enhancement from the heated top wall was due to an increased velocity gradient near the wall. The study proposes a new correlation for local Nusselt numbers in the 2:1 rectangular duct, which covers both thermally developing and thermally fully developed regions. Consequently, a temperature-dependent viscous fluid with a non-circular duct is proposed for use in the design of a liquid cooling module for the computer industry and in compact heat exchangers in general.
AB - The present study investigates the influence of variable viscosity of temperature-dependent fluids on the laminar heat transfer and friction factor in a 2:1 rectangular duct. The H1 thermal boundary condition corresponding to axially constant heat flux and peripherally constant temperature was adopted for a top-wall-heated configuration. The governing conservation equations of mass, momentum, and energy were solved using a finite volume method, and the range of the Prandtl number was from 7 to 15000. The present numerical results of local Nusselt numbers for oil showed 70-80% enhancement over those of a constant property fluid and 40-50% enhancement over water, and gave excellent agreement with recent experimental results [Int. J. Heat Mass Transfer 35, 641-648 (1992)]. The heat transfer enhancement from the heated top wall was due to an increased velocity gradient near the wall. The study proposes a new correlation for local Nusselt numbers in the 2:1 rectangular duct, which covers both thermally developing and thermally fully developed regions. Consequently, a temperature-dependent viscous fluid with a non-circular duct is proposed for use in the design of a liquid cooling module for the computer industry and in compact heat exchangers in general.
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M3 - Article
AN - SCOPUS:0027883630
VL - 36
SP - 4365
EP - 4373
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
IS - 18
ER -