Full Text:   <2630>

Summary:  <1919>

CLC number: TB611

On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

Crosschecked: 2016-05-11

Cited: 0

Clicked: 4198

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Yong-hua Huang

http://orcid.org/0000-0001-6453-8430

-   Go to

Article info.
Open peer comments

Journal of Zhejiang University SCIENCE A 2016 Vol.17 No.6 P.485-496

http://doi.org/10.1631/jzus.A1500319


Numerical investigation on thermal effects by adding thin compartmental plates into cooling enclosures with heat-leaking walls


Author(s):  Yong-hua Huang, Qiang Chen

Affiliation(s):  Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   huangyh@sjtu.edu.cn

Key Words:  Plate, Enclosure, Natural convection, Lattice Boltzmann, Cooling rate, Temperature uniformity


Share this article to: More <<< Previous Article|

Yong-hua Huang, Qiang Chen. Numerical investigation on thermal effects by adding thin compartmental plates into cooling enclosures with heat-leaking walls[J]. Journal of Zhejiang University Science A, 2016, 17(6): 485-496.

@article{title="Numerical investigation on thermal effects by adding thin compartmental plates into cooling enclosures with heat-leaking walls",
author="Yong-hua Huang, Qiang Chen",
journal="Journal of Zhejiang University Science A",
volume="17",
number="6",
pages="485-496",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500319"
}

%0 Journal Article
%T Numerical investigation on thermal effects by adding thin compartmental plates into cooling enclosures with heat-leaking walls
%A Yong-hua Huang
%A Qiang Chen
%J Journal of Zhejiang University SCIENCE A
%V 17
%N 6
%P 485-496
%@ 1673-565X
%D 2016
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500319

TY - JOUR
T1 - Numerical investigation on thermal effects by adding thin compartmental plates into cooling enclosures with heat-leaking walls
A1 - Yong-hua Huang
A1 - Qiang Chen
J0 - Journal of Zhejiang University Science A
VL - 17
IS - 6
SP - 485
EP - 496
%@ 1673-565X
Y1 - 2016
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1500319


Abstract: 
Adding thin compartmental plates near the internal walls of enclosures has been numerically modeled using the lattice Boltzmann method. This practice was found to be an effective way to further suppress the disadvantageous effects of heat leak, along with the application of insulation materials on the external surfaces. A modified extrapolation scheme for handling the thermal boundary of the thin plate was proposed and verified by comparison with the conventional coupled boundary scheme. The simulation of the natural convection during the cooling down processes and at steady states in the enclosure indicates that the existence of the plates leads to a higher cooling rate and a more favorable temperature uniformity. For a typical case, the one with plates takes 6% less time to reach the halfway point of the steady state and has 26% less temperature variance. Effects by the plates’ positions and sizes were parametrically investigated, in order to find an optimal geometrical configuration. In addition, the fluid’s intrinsic characteristics and the relative heat leak by using the Rayleigh number and Nusselt number, respectively, have been discussed in detail through hydrodynamic and convective heat transfer analyses.

壁面漏热的冷却腔体内增加薄壁隔板引起的热效应数值研究

目的:评估增加薄壁隔板对于降低封闭腔中漏热面的作用,为在实际系统中采用薄壁隔板提高温度均匀性的可行性提供理论依据。
创新点:提出一种新的非平衡态外推边界处理方法;提出在封闭冷却墙体内增加薄壁隔板的有效漏热控制方法。
方法:采用热格子波尔兹曼(Boltzmann)方法以及针对薄壁隔板的改进型非平衡态热边界条件处理方法,将数值计算与理论分析相结合,研究漏热冷却腔体内的动态过程。
结论:1. 在漏热壁面附近增加薄壁隔板可使壁面漏热的冷却箱体内降温时间缩短,并且最终达到更好的温度均匀性。2. 薄壁隔板的位置靠近漏热面可增强其效果,隔板尺寸越大效果越好。3. 在更大的努塞尔数(Nu)或更小的瑞利数(Ra)条件下,增加隔板所起到的效果更加明显。

关键词:隔板;封闭腔;自然对流;格子波尔兹曼;冷却速率;温度均匀性

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Altaç, Z., Kurtul, Ö., 2007. Natural convection in tilted rectangular enclosures with a vertically situated hot plate inside. Applied Thermal Engineering, 27(11-12):1832-1840.

[2]Bararnia, H., Soleimani, S., Ganji, D.D., 2011. Lattice Boltzmann simulation of natural convection around a horizontal elliptic cylinder inside a square enclosure. International Communications in Heat and Mass Transfer, 38(10):1436-1442.

[3]Ben-Nakhi, A., Chamkha, A.J., 2007. Conjugate natural convection in a square enclosure with inclined thin fin of arbitrary length. International Journal of Thermal Sciences, 46(5):467-478.

[4]Bettaibi, S., Sediki, E., Kuznik, F., et al., 2015. Lattice Boltzmann simulation of mixed convection heat transfer in a driven cavity with non-uniform heating of the bottom wall. Communications in Theoretical Physics, 63(1):91-100.

[5]Bilgen, E., 2005. Natural convection in cavities with a thin fin on the hot wall. International Journal of Heat and Mass Transfer, 48(17):3493-3505.

[6]Corvaro, F., Paroncini, M., 2009. An experimental study of natural convection in a differentially heated cavity through a 2D-PIV system. International Journal of Heat and Mass Transfer, 52(1-2):355-365.

[7]Costa, V.A.F., 2012. Natural convection in partially divided square enclosures: effects of thermal boundary conditions and thermal conductivity of the partitions. International Journal of Heat and Mass Transfer, 55(25-26):7812-7822.

[8]Frederick, R.L., 2007. Heat transfer enhancement in cubical enclosures with vertical fins. Applied Thermal Engineering, 27(8-9):1585-1592.

[9]Guo, Z., Shi, B., Zheng, C., 2002a. A coupled lattice BGK model for the Boussinesq equations. International Journal for Numerical Methods in Fluids, 39(4):325-342.

[10]Guo, Z., Zheng, C., Shi, B., 2002b. An extrapolation method for boundary conditions in lattice Boltzmann method. Physics of Fluids, 14(6):2007-2010.

[11]He, X., Luo, L.S., 1997. Theory of the lattice Boltzmann method: from the Boltzmann equation to the lattice Boltzmann equation. Physical Review E, 56(6):6811-6817.

[12]He, X., Chen, S., Doolen, G.D., 1998. A novel thermal model for the lattice Boltzmann method in incompressible limit. Journal of Computational Physics, 146(1):282-300.

[13]Hortmann, M., Perić, M., Scheuerer, G., 1990. Finite volume multigrid prediction of laminar natural convection: bench-mark solutions. International Journal for Numerical Methods in Fluids, 11(2):189-207.

[14]Jami, M., Mezrhab, A., Bouzidi, M., et al., 2006. Lattice-Boltzmann computation of natural convection in a partitioned enclosure with inclined partitions attached to its hot wall. Physical A: Statistical Mechanics and Its Applications, 368(2):481-494.

[15]Janssen, R.J.A., Henkes, R.A.W.M., Hoogendoorn, C.J., 1993. Transition to time-periodicity of a natural-convection flow in a 3D differentially heated cavity. International Journal of Heat and Mass Transfer, 36(11):2927-2940.

[16]Kefayati, G.R., 2016. Simulation of heat transfer and entropy generation of MHD natural convection of non-Newtonian nanofluid in an enclosure. International Journal of Heat and Mass Transfer, 92:1066-1089.

[17]Kefayati, G.R., Gorji-Bandpy, M., Sajjadi, H., et al., 2012. Lattice Boltzmann simulation of MHD mixed convection in a lid-driven square cavity with linearly heated wall. Scientia Iranica, 19(4):1053-1065.

[18]Ling, C.M., Wang, Q.W., Tao, W.Q., et al., 1999. Experimental study on transient natural convection in a cube enclosure with an isolated vertical cyclically heated plate. Journal of Thermal Science, 8(1):51-58.

[19]Qian, Y.H., D’Humières, D., Lallemand, P., 1992. Lattice BGK models for Navier-Stokes equation. EPL (Europhysics Letters), 17(6):479-484.

[20]Ren, Q., Chan, C.L., 2016. Natural convection with an array of solid obstacles in an enclosure by lattice Boltzmann method on a CUDA computation platform. International Journal of Heat and Mass Transfer, 93:273-285.

[21]Shan, X., Chen, H., 1993. Lattice Boltzmann model for simulating flows with multiple phases and components. Physical Review E, 47(3):1815-1819.

[22]Succi, S., 2001. The Lattice Boltzmann Equation for Fluid Dynamics and beyond. Oxford University Press, New York.

[23]Yang, M., Tao, W.Q., 1995. Three-dimensional natural convection in an enclosure with an internal isolated vertical plate. Journal of Heat Transfer, 117(3):619-625.

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE