Numerical Analysis of Air Layer Thickness of Horizontally Enclosed Square Cavity

Abstract

Abstract: Abstract： In order to analyze the relatively optimal air layer thickness of the horizontally enclosed square cavity based on its thermal insulation, this paper established a twodimensional numerical model and calculated the radiation and convection heat transfer in the horizontally closed square cavity at different temperature differences and different thermal conductivities of the solid boundary material by using the “Presto!” pressure interpolation scheme and SIMPLE (semiimplicit method for pressurelinked equations) decoupling algorithm. The relative optimal air layer thickness values of the horizontally closed square cavity at different temperature difference and thermal conductivity of the boundary material under a certain condition were obtained from the regression analysis of the results.

Key words: Key words： horizontally enclosed square cavity, numerical calculation, optimum air layer thickness, regression analysis

CLC Number:

TU 114.4

HE Fangxiang, ZHAN Shulin, LAI Junying. Numerical Analysis of Air Layer Thickness of Horizontally Enclosed Square Cavity[J]. Journal of Shanghai Jiao Tong University, 2016, 50(03): 384-388.

References

［1］宋徐辉，席时桐.自然对流和气体辐射耦合传热的数值模拟［J］.上海交通大学学报.1996，30(12)：2934. SONG Xuhui, XI Shitong. Numerical study of combined natural convective and radioactive heat transfer［J］. Journal of Shanghai Jiaotong University, 1996，30(12)：2934. ［2］战乃岩，徐沛巍.考虑建筑房间内导热辐射与自然对流偶合时外围护结构对自然对流换热的影响［J］.太阳能学报，2011，32(4)：501507. ZHAN Naiyan, XU Peiwei. Influence of building envelop on natural convecton and heat transfer when considering indoor heat transfer and radiation coupled in natural convection［J］. Acta Energyae Solaris Sinica, 2011，32(4)：501507. ［3］MOSTAFA R, AMIR S. Experimental study of radiation and free convection in an enclosure with underfloor heating system ［J］. Energy Convection and Managemen, 2011, 52: 27522757. ［4］HYUN J K, BYOUNG H A, JINIL P, et al. Experimental study on natural convection heat transfer from horizontal cylinders with longitudinal plate fins ［J］. Mechanical Science and Technology, 2013,27(2):593599. ［5］GALLEGOS M A, BALDERAS B J, ARMANDO V C, et al. Analysis of the conjugate heat transfer in a multilayer wall including an air layer ［J］. Applied Thermal Engineering, 2010， 30： 599604. ［6］孟庆林，蔡宁，陈启高.封闭空气层热阻的理论解［J］.华南理工大学学报(自然科学版)，1997, 25(4):116119. MENG Qinglin, CAI Ning, CHEN Qigao. A theoretical solution on the thermal resistance of sealed air layer［J］. Journal of South China University of Technology(Natural Science Edition), 1997, 25(4):116119. ［7］孙丁. 建筑围护结构中封闭方腔空气夹层的热工性能研究［D］.湖南：南华大学城市建设学院，2013. ［8］MUSLUM A, HASAN K. Determination of optimum thickness of doubleglazed Window for the climatic regions of Turkey ［J］. Energy and Building, 2010, 42：17731778. ［9］杨世铭, 陶文栓. 传热学［M］. 4版.北京：高等教育出版社, 2006: 272273. ［10］SHIGEAKI I, TSUYOSHI T, WEN J Y. Effect of vertical fins on local heat transfer performance in a horizontal fluid layer ［J］. International Journal of Heat and Mass Transfer, 1999, 42: 28972903. ［11］LAHCEN B, HASSAN H D R. Rousse. numerical simulation of heat transfers in a room in the presence of a thin horizontal heated plate ［J］. Energy Procedia, 2013, 42: 549556. ［12］ANSYS Inc. ANSYS fluent 12.0 user's guide, theory guide ［EB/OL］. (20150806)［20091008］. http://www. ansys.com/ Products/ Fluids/ANSYS+Fluent/ Resource Center/ ANSYS Fluent 12.0 User’s Guide.pdf.

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