Thermal and optical engineering applications of electromagnetic wave scattering from rough surfaces include temperature measurement, radiation heating process, etc. Most of the surfaces have random roughness and are often with coating material different from the substrate. However, the understanding of radiative properties of coated rough surfaces is not well addressed at this point. This paper presented a novel hybrid partial coherence and geometry optics (HPCGO) model to improve the generic geometry optics (GO) prediction by incorporating a previously developed partial coherence reflectance equation. In this way, HPCGO expands the applicable region of GO model and largely reduces the computation time of integrating different wavelength results in the regular hybrid model that considers coherence effect only. In this study, the HPCGO model is first compared with the more rigorous Maxwell equations solvers, the finite-difference time-domain (FDTD) method, and integral equation (IE) method. Then, the HPCGO model is applied to study the coherent effect of directional-hemispherical reflectance from coated rough surfaces. It is found the roughness of coated rough surface can cause partially coherent or noncoherent scattered light even if the incident light source is coherent. It also shows the reflected electromagnetic wave's coherence effect reduces with increased coating thickness and surface roughness, besides the previously recognized incident wave-number bandwidth. The effect of reduce coherence in scattered wave is quantified. Finally a regime map, even limited in the roughness and coating thickness dimensionless parameter ranges, provides the region of validity of the HPCGO model.
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September 2013
Research-Article
A Hybrid Partial Coherence and Geometry Optics Model of Radiative Property on Coated Rough Surfaces
Jun Qiu,
Jun Qiu
School of Energy Science and Engineering,
Mechanical and Aerospace Engineering Department,
e-mail: qiujun8326@163.com
Harbin Institute of Technology
,Harbin 150001, Heilongjiang
, China
;Mechanical and Aerospace Engineering Department,
Florida Institute of Technology
,Melbourne, FL 32901
e-mail: qiujun8326@163.com
Search for other works by this author on:
Yuan Ting Wu,
Yuan Ting Wu
Mechanical and Aerospace Engineering Department,
e-mail: wuy2009@my.fit.edu
Florida Institute of Technology
,Melbourne, FL 32901
e-mail: wuy2009@my.fit.edu
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Zhifeng Huang,
Zhifeng Huang
State Key Laboratory of Coal Combustion,
e-mail: zhifhuang@gmail.com
Huazhong University of Science and Technology
,Wuhan 430074, Hubei
, China
e-mail: zhifhuang@gmail.com
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Pei-Feng Hsu,
Pei-Feng Hsu
1
Mechanical and Aerospace Engineering Department,
School of Mechanical Engineering,
e-mail: phsu@fit.edu
Florida Institute of Technology
,Melbourne, FL 32901
;School of Mechanical Engineering,
Shanghai Dianji University
,Shanghai 201306
, China
e-mail: phsu@fit.edu
1Corresponding author.
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Lin-Hua Liu,
Lin-Hua Liu
School of Energy Science and Engineering,
e-mail: lhliu@hit.edu.cn
Harbin Institute of Technology
,Harbin 150001, Heilongjiang
, China
e-mail: lhliu@hit.edu.cn
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Huai-Chun Zhou
Huai-Chun Zhou
Department of Thermal Engineering,
e-mail: hczh@mail.tsinghua.edu.cn
Tsinghua University
,Haidian, Beijing 100084
, China
e-mail: hczh@mail.tsinghua.edu.cn
Search for other works by this author on:
Jun Qiu
School of Energy Science and Engineering,
Mechanical and Aerospace Engineering Department,
e-mail: qiujun8326@163.com
Harbin Institute of Technology
,Harbin 150001, Heilongjiang
, China
;Mechanical and Aerospace Engineering Department,
Florida Institute of Technology
,Melbourne, FL 32901
e-mail: qiujun8326@163.com
Yuan Ting Wu
Mechanical and Aerospace Engineering Department,
e-mail: wuy2009@my.fit.edu
Florida Institute of Technology
,Melbourne, FL 32901
e-mail: wuy2009@my.fit.edu
Zhifeng Huang
State Key Laboratory of Coal Combustion,
e-mail: zhifhuang@gmail.com
Huazhong University of Science and Technology
,Wuhan 430074, Hubei
, China
e-mail: zhifhuang@gmail.com
Pei-Feng Hsu
Mechanical and Aerospace Engineering Department,
School of Mechanical Engineering,
e-mail: phsu@fit.edu
Florida Institute of Technology
,Melbourne, FL 32901
;School of Mechanical Engineering,
Shanghai Dianji University
,Shanghai 201306
, China
e-mail: phsu@fit.edu
Lin-Hua Liu
School of Energy Science and Engineering,
e-mail: lhliu@hit.edu.cn
Harbin Institute of Technology
,Harbin 150001, Heilongjiang
, China
e-mail: lhliu@hit.edu.cn
Huai-Chun Zhou
Department of Thermal Engineering,
e-mail: hczh@mail.tsinghua.edu.cn
Tsinghua University
,Haidian, Beijing 100084
, China
e-mail: hczh@mail.tsinghua.edu.cn
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Heat Transfer. Manuscript received June 30, 2012; final manuscript received February 19, 2013; published online July 26, 2013. Assoc. Editor: Zhuomin Zhang.
J. Heat Transfer. Sep 2013, 135(9): 091503 (6 pages)
Published Online: July 26, 2013
Article history
Received:
June 30, 2012
Revision Received:
February 19, 2013
Citation
Qiu, J., Ting Wu, Y., Huang, Z., Hsu, P., Liu, L., and Zhou, H. (July 26, 2013). "A Hybrid Partial Coherence and Geometry Optics Model of Radiative Property on Coated Rough Surfaces." ASME. J. Heat Transfer. September 2013; 135(9): 091503. https://doi.org/10.1115/1.4024466
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