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Journal articles on the topic 'Conduction-radiation'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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1

Izadpanah, E., S. Talebi, and M. H. Hekmat. "Numerical simulation of non-Fourier effects in combined heat transfer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 2 (June 23, 2010): 429–36. http://dx.doi.org/10.1243/09544062jmes2001.

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The non-Fourier effects on transient and steady temperature distribution in combined heat transfer are studied. The processes of coupled conduction and radiation heat transfer in grey, absorbing, emitting, scattering, one-dimensional medium with black boundary surfaces are analysed numerically. The hyperbolic heat conduction equation is solved by flux splitting method, and the radiative transfer equation is solved by P1 approximate method. The transient thermal responses obtained from non-Fourier heat conduction equation are compared with those obtained from the Fourier heat conduction equation. The results show that the non-Fourier effect can be important when the conduction to radiation parameter and the thermal relaxation time are larger. Further, the radiation effect is more pronounced at small values of single scattering albedo and conduction to radiation parameters. Analysis results indicate that the internal radiation in the medium significantly influences the wave nature.
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2

Glass, D. E., M. N. Özişik, and Brian Vick. "Hyperbolic heat conduction with surface radiation." International Journal of Heat and Mass Transfer 28, no. 10 (October 1985): 1823–30. http://dx.doi.org/10.1016/0017-9310(85)90204-2.

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3

Milka, Zdeněk. "Finite element solution of a stationary heat conduction equation with the radiation boundary condition." Applications of Mathematics 38, no. 1 (1993): 67–79. http://dx.doi.org/10.21136/am.1993.104535.

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4

Tuntomo, A., and C. L. Tien. "Transient Heat Transfer in a Conducting Particle With Internal Radiant Absorption." Journal of Heat Transfer 114, no. 2 (May 1, 1992): 304–9. http://dx.doi.org/10.1115/1.2911276.

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The objective of the present work is to analyze rigorously the transient heat transfer of an irradiated particle by treating the radiant absorption on a local basis. A new conduction-to-radiation parameter is introduced to characterize the relative importance of heat transfer by conduction as compared with that by radiation. The study on the transient temperature field as a function of conduction-to-radiation parameter establishes a criterion identifying the circumstances where heat transfer by radiation is so predominant that conduction is negligible. The current effort is also directed at developing a convenient method for predicting the transient local maximum temperature and explosion time delay of an intensely irradiated liquid droplet.
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5

Nashine, Prerana, and Ashok Kumar Satapathy. "Transient Radiation Coupled With Conduction Heat Transfer in a One Dimensional Slab." Applied Mechanics and Materials 619 (August 2014): 94–98. http://dx.doi.org/10.4028/www.scientific.net/amm.619.94.

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The present research work views over a solution of radiative transport problem along with conduction in one perspective piece and in the existence of participating media. The radiative transfer equations are developed for anisotropically scattering, absorbing, emitting medium and the equation is being discretized using finite volume method. Heat flux and the incident radiation effects have been computed at three different time step. Transient radiation along with transient conduction is solved and the radiative effect has been measured using radiative transfer equation while the conduction term has been measured using conduction equation.
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6

Hogan, R. E., and D. K. Gartling. "Solution strategies for coupled conduction/radiation problems." Communications in Numerical Methods in Engineering 24, no. 6 (November 19, 2007): 523–42. http://dx.doi.org/10.1002/cnm.1063.

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7

CUI, Miao, XiaoWei GAO, and Jing WANG. "BEM for coupling radiation-conduction heat transfer." SCIENTIA SINICA Physica, Mechanica & Astronomica 41, no. 3 (March 1, 2011): 302–8. http://dx.doi.org/10.1360/132010-860.

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8

Yadlowsky, E. J., and R. C. Hazelton. "Radiation induced conduction in Kapton H film." IEEE Transactions on Nuclear Science 35, no. 4 (1988): 1050–54. http://dx.doi.org/10.1109/23.3702.

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9

Varady, Mark J., and Andrei G. Fedorov. "Combined Radiation and Conduction in Glass Foams." Journal of Heat Transfer 124, no. 6 (December 1, 2002): 1103–9. http://dx.doi.org/10.1115/1.1513579.

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Understanding of heat transfer in glass foams and the development of theoretical tools for predicting heat transfer properties of glass foams is critical to improving the efficiency of glass manufacturing. In this paper, combined radiation and conduction heat transfer in a semitransparent glass foam layer is analyzed. The foam layer is thin and of the uniform thickness, bounded by hot combustion gases on top and glass melt on bottom, and exposed to isotropic radiation originating from hot refractories. Heat transfer is assumed to be one-dimensional perpendicular to the plane-parallel foam layer. A previously developed model is used to calculate effective extinction coefficients and scattering phase function of the foam layer using a void size distribution and assuming all voids to be spherical. These radiation properties are then used along with a Schuster-Schwarzchild two-flux approximation to solve the radiative transfer equation (RTE). A method for obtaining the effective thermal conductivity of the foam layer is also presented. The RTE and the energy conservation equations are simultaneously solved using a numerical iteration procedure. The effect of foam thickness and bubble size on the temperature distribution in the foam layer is studied.
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10

Trapani, G., S. Quartuccio, A. Dalbeni, A. Stellitano, N. Paunovic, and E. Imbalzano. "Late radiation-induced cardiac conduction system abnormalities." International Journal of Cardiology 173, no. 3 (May 2014): e40-e41. http://dx.doi.org/10.1016/j.ijcard.2014.03.125.

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11

Mabood, Fazle, Waqar A. Khan, and Ahmad Izani Md Ismail. "Series Solution for Steady Heat Transfer in a Heat-Generating Fin with Convection and Radiation." Mathematical Problems in Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/806873.

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The steady heat transfer in a heat-generating fin with simultaneous surface convection and radiation is studied analytically using optimal homotopy asymptotic method (OHAM). The steady response of the fin depends on the convection-conduction parameter, radiation-conduction parameter, heat generation parameter, and dimensionless sink temperature. The heat transfer problem is modeled using two-point boundary value conditions. The results of the dimensionless temperature profile for different values of convection-conduction, radiation-conduction, heat generation, and sink temperature parameters are presented graphically and in tabular form. Comparison of the solution using OHAM with homotopy analysis method (HAM) andRunge-Kutta-Fehlberg fourth-fifth-ordernumerical method for various values of controlling parameters is presented. The comparison shows that the OHAM results are in excellent agreement with NM.
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12

Zhang, Lingyun, Yupeng Hu, and Minghai Li. "Combined Heat Transfer Mechanisms in the Porous Char Layer Formed from the Intumescent Coatings under Fire." Coatings 11, no. 2 (February 9, 2021): 200. http://dx.doi.org/10.3390/coatings11020200.

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This study examines the combined heat transfer by thermal conduction, natural convection and surface radiation in the porous char layer that is formed from the intumescent coating under fire. The results show that some factors, such as the Rayleigh number, conductivity ratio, emissivity, radiation–conduction number, void fraction and heating mode have a certain effect on the total heat transfer. In addition, the natural convection of the air in the cavity always inhibits surface radiation among the solid walls and thermal conduction, and the character of the total heat transfer is the competition result of the three heat transfer mechanisms.
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13

West, J., S. Bhattacharjee, and R. A. Altenkirch. "Surface Radiation Effects on Flame Spread Over Thermally Thick Fuels in an Opposing Flow." Journal of Heat Transfer 116, no. 3 (August 1, 1994): 646–51. http://dx.doi.org/10.1115/1.2910918.

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A computational model of flame spread over a thermally thick solid fuel in an opposing-flow environment is presented. Unlike thermally thin fuels, for which the effect of fuel surface radiation is negligible for high levels of opposing flow, fuel surface radiation is important for thermally thick fuels for all flow levels. This result is shown to derive from the fact that the ratio of the rate of heat transfer by re-radiation from the surface to that by conduction from the gas to the solid is proportional to the length over which heat can be conducted forward of the flame to sustain spreading. For thin fuels, this length decreases with increasing flow velocity such that while radiation is important at low flow velocities it is not at the higher velocities. For thick fuels at low flow velocities, the conduction length is determined by gas-phase processes and decreases with increasing flow velocity. But at higher flow velocities, the conduction length is determined by solid-phase processes and is rather independent of the gas-phase flow. The result is that over a wide range of flow velocities, the conduction length of importance does not change substantially as it switches from one phase to another so that the ratio of radiation to conduction is of unit order throughout that wide range of flow.
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14

Kurazumi, Yoshihito, Emi Kondo, Jin Ishii, Tomonori Sakoi, Kenta Fukagawa, Zhecho Dimitrov Bolashikov, Tadahiro Tsuchikawa, Naoki Matsubara, and Tetsumi Horikoshi. "Effect of the Environmental Stimuli upon the Human Body in Winter Outdoor Thermal Environment." Journal of Environmental and Public Health 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/418742.

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In order to manage the outdoor thermal environment with regard to human health and the environmental impact of waste heat, quantitative evaluations are indispensable. It is necessary to use a thermal environment evaluation index. The purpose of this paper is to clarify the relationship between the psychological thermal responses of the human body and winter outdoor thermal environment variables. Subjective experiments were conducted in the winter outdoor environment. Environmental factors and human psychological responses were measured. The relationship between the psychological thermal responses of the human body and the outdoor thermal environment index ETFe (enhanced conduction-corrected modified effective temperature) in winter was shown. The variables which influence the thermal sensation vote of the human body are air temperature, long-wave thermal radiation and short-wave solar radiation. The variables that influence the thermal comfort vote of the human body are air temperature, humidity, short-wave solar radiation, long-wave thermal radiation, and heat conduction. Short-wave solar radiation, and heat conduction are among the winter outdoor thermal environment variables that affect psychological responses to heat. The use of thermal environment evaluation indices that comprise short-wave solar radiation and heat conduction in winter outdoor spaces is a valid approach.
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15

Ruperti, N. J., M. Raynaud, and J. F. Sacadura. "A Method for the Solution of the Coupled Inverse Heat Conduction-Radiation Problem." Journal of Heat Transfer 118, no. 1 (February 1, 1996): 10–17. http://dx.doi.org/10.1115/1.2824022.

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The inverse problem of estimating surface temperatures and fluxes from simulated transient temperature measured within a semitransparent slab is studied. A space-marching technique, whose performance is already known for the solution of the inverse heat conduction problem (IHCP), is adapted to solve an inverse heat conduction-radiation problem (IHCRP). An iterative algorithm is proposed. Different values of the conduction-to-radiation parameter are considered in order to show, with benchmark test cases, the effects of the radiative heat transfer mode on the performance of the inverse method.
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16

Zhan, Nai Yan, Kai Lin Huang, and Li Mei Sun. "The Numerical Method Analysis of the Natural Convection and Heat Transfer in the Room with Heat Transfer of Material and Radiation Coupled in Natural Convection." Advanced Materials Research 703 (June 2013): 319–23. http://dx.doi.org/10.4028/www.scientific.net/amr.703.319.

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In this paper, the additional source term method is applied to the flow and heat transfer problems with radiation. According to the solid radiation surfaces situation, the effects of radiation on heat transfer can be divided into two cases. One is that the solid wall is in the solver region. The conduction, heat transfer and radiation act together in the interface between solid and liquid. This is the problem of combined conduction, heat transfer and radiation. The other is that the solid wall is the boundary of the solver region. The radiation heat is used as boundary condition. The solution method is different to them.
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17

Liu, L. H., H. P. Tan, and T. W. Tong. "Transient Coupled Radiation-Conduction in Semitransparent Spherical Particle." Journal of Thermophysics and Heat Transfer 16, no. 1 (January 2002): 43–49. http://dx.doi.org/10.2514/2.6650.

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18

Liu, L. H. "Transient coupled radiation–conduction in infinite semitransparent cylinders." Journal of Quantitative Spectroscopy and Radiative Transfer 74, no. 1 (July 2002): 97–114. http://dx.doi.org/10.1016/s0022-4073(01)00255-2.

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19

Soto, Oscar. "Radiation-induced conduction block: Resolution following anticoagulant therapy." Muscle & Nerve 31, no. 5 (2005): 642–45. http://dx.doi.org/10.1002/mus.20273.

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20

Tsai, Jen-Hui, and Jenn-Der Lin. "Transient combined conduction and radiation with anisotropic scattering." Journal of Thermophysics and Heat Transfer 4, no. 1 (January 1990): 92–97. http://dx.doi.org/10.2514/3.29171.

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21

Balaji, C., and S. P. Venkateshan. "Combined conduction, convection and radiation in a slot." International Journal of Heat and Fluid Flow 16, no. 2 (April 1995): 139–44. http://dx.doi.org/10.1016/0142-727x(94)00014-4.

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22

Hisano, Kumao, and Francis Placido. "Quasistatic thermal conduction measurement by thermal radiation calorimetry." High Temperatures-High Pressures 30, no. 3 (1998): 297–305. http://dx.doi.org/10.1068/htec169.

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23

Wintle, H. J. "Models for the decay of radiation-induced conduction." IEEE Transactions on Electrical Insulation 26, no. 1 (1991): 26–34. http://dx.doi.org/10.1109/14.68223.

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24

Joulain, Karl. "Near Field Heat Transfer: Where Radiation Becomes Conduction." Journal of Computational and Theoretical Nanoscience 5, no. 2 (February 1, 2008): 194–200. http://dx.doi.org/10.1166/jctn.2008.2460.

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25

Heinemann, U., R. Caps, and J. Fricke. "Radiation-conduction interaction: an investigation on silica aerogels." International Journal of Heat and Mass Transfer 39, no. 10 (July 1996): 2115–30. http://dx.doi.org/10.1016/0017-9310(95)00313-4.

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26

Chih-Yang, Wu. "Hyperbolic heat conduction with surface radiation and reflection." International Journal of Heat and Mass Transfer 32, no. 8 (August 1989): 1585–87. http://dx.doi.org/10.1016/0017-9310(89)90081-1.

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27

Nia, M. Foruzan, and S. A. Gandjalikhan Nassab. "Conjugate Heat Transfer Study of Combined Radiation and Forced Convection Turbulent Separated Flow." International Journal of Nonlinear Sciences and Numerical Simulation 18, no. 1 (February 1, 2017): 29–39. http://dx.doi.org/10.1515/ijnsns-2015-0134.

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AbstractIn the current study, a numerical investigation of two-dimensional combined convection-radiation heat transfer of turbulent gas flow over a backward-facing step (BFS) in a horizontal rectangular duct is presented. The computational domain contains two different parts including gas flow and solid element that makes the problem as a conjugate one. The gas phase is considered to be a radiating media that can absorb, emit and scatter thermal radiation, where in solid phase, heat transfer takes place by conduction. The set of governing equations for gas flow is solved numerically using the CFD technique and the $$k - \varepsilon $$ model is employed for computation of turbulence fluctuations. To evaluate the radiative term in the gas energy equation, the radiative transfer equation (RTE) is solved by the discrete ordinates method (DOM). Inside the solid phase, the conduction equation is solved to obtain the temperature distribution. The effects of conduction ratio, optical thickness, radiation-conduction parameter and albedo coefficient on heat transfer behavior of the system are carried out.
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28

Matthews, L. K., R. Viskanta, and F. P. Incropera. "Combined Conduction and Radiation Heat Transfer in Porous Materials Heated by Intense Solar Radiation." Journal of Solar Energy Engineering 107, no. 1 (February 1, 1985): 29–34. http://dx.doi.org/10.1115/1.3267649.

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An analysis is presented to predict the heat transfer characteristics of a plane layer of a semitransparent, high-temperature, porous material which is irradiated by an intense solar flux. A transient, combined conduction and radiation heat transfer model, which is based on a two-flux approximation for the radiation, is used to predict the temperature distribution and heat transfer in the material. Numerical results have been obtained using thermophysical and radiative properties of zirconia as a typical material. The results show that radiation is an important mode of heat transfer, even when the opacity of the material is large (τL > 100). Radiation is the dominant mode of heat transfer in the front third of the material and comparable to conduction toward the back. The semitransparency and high single scattering albedo of the zirconia combine to produce a maximum temperature in the interior of the material.
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29

Zare, Mehdi, and Sadegh Sadeghi. "Development of hybrid method for coupled conduction-radiation heat transfer in two-dimensional irregular enclosure considering thermo-radiative effects and varying thermal conductivity." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 4 (April 19, 2019): 1815–37. http://dx.doi.org/10.1108/hff-11-2018-0667.

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Purpose This study aims to perform a comprehensive investigation to model the thermal characteristics of a coupled conduction-radiation heat transfer in a two-dimensional irregular enclosure including a triangular-shaped heat source. Design/methodology/approach For this purpose, a promising hybrid technique based on the concepts of blocked-off method, FVM and DOM is developed. The enclosure consists of several horizontal, vertical and oblique walls, and thermal conductivity within the enclosure varies directly with temperature and indirectly with position. To simplify the complex geometry, a promising mathematical model is introduced using blocked-off method. Emitting, absorbing and non-isotropic scattering gray are assumed as the main radiative characteristics of the steady medium. Findings DOM and FVM are, respectively, applied for solving radiative transfer equation (RTE) and the energy equation, which includes conduction, radiation and heat source terms. The temperature and heat flux distributions are calculated inside the enclosure. For validation, results are compared with previous data reported in the literature under the same conditions. Results and comparisons show that this approach is highly efficient and reliable for complex geometries with coupled conduction-radiation heat transfer. Finally, the effects of thermo-radiative parameters including surface emissivity, extinction coefficient, scattering albedo, asymmetry factor and conduction-radiation parameter on temperature and heat flux distributions are studied. Originality/value In this paper, a hybrid numerical method is used to analyze coupled conduction-radiation heat transfer in an irregular geometry. Varying thermal conductivity is included in this analysis. By applying the method, results obtained for temperature and heat flux distributions are presented and also validated by the data provided by several previous papers.
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30

Li, Tao, L. Liu, Q. Xu, and S. Z. Zhu. "Fabrication and Optical Properties of Sm2Zr2O7-NiCr2O4." Key Engineering Materials 512-515 (June 2012): 459–62. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.459.

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Sm2Zr2O7 is one of the promising candidate materials for the next generation thermal barrier coatings because of its excellent thermal properties. But at high temperature the thermal conductivity of rare-earth zirconate increases because of radiation conduction. NiCr2O4, which can absorb the infrared photons intensely, was introduced to reduce the radiation conduction of rare-earth zirconate. NiCr2O4 powder was prepared by coprecipitation. The bulks of Sm2Zr2O7— NiCr2O4 with different content of NiCr2O4 were prepared by using non-pressure sintering. The phase and microstructure of the samples were characterized by XRD and SEM. The optical absorption was also investigated. The absorptivity of the composite, which was generally higher than that of pure Sm2Zr2O7 prepared by coprecipitation and non-pressure sintering, was enhanced with the content of NiCr2O4 increasing. The enhancement of absorptivity will reduce the radiation conduction of rare-earth zirconate potentially.
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31

Singhal, Shefali, Gaurav Jain, Prachi Arya, Virandra Verma, and Ajit Singh Rajput. "Nerve conduction velocities in radiologic technologists: A pilot study." Indian Journal of Physiology and Pharmacology 64 (February 27, 2021): 293–97. http://dx.doi.org/10.25259/ijpp_77_2020.

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Objectives: Radiologic technologists (RTs) are typically exposed to low doses of radiations for longer periods, which have a health risk over many organs and tissues. Resistant tissues like nerves have shown neuropathic changes due to acute high-dose radiation exposure in the form of radiation therapy but the effect of low-dose chronic radiation exposure over peripheral nerves in RTs has been studied scantily. Materials and Methods: Nerve conduction parameters were recorded from 30 RTs and 30 age- and sex-matched healthy individuals who were not exposed to radiation. Motor nerve conduction study (NCS) of bilateral median, ulnar, radial, common peroneal and tibial nerves and sensory NCS of bilateral median, ulnar and radial nerves were recorded and compared. Results: Significant changes were observed in the form of reduction in motor and sensory nerve conduction velocity (P < 0.05) in all the examined nerves. Sensory nerve action potential (SNAP) amplitudes were reduced and latencies were prolonged significantly (P < 0.05) in all the examined sensory nerves. We also found reduced compound muscle action potential amplitude (significant in ulnar, radial, common peroneal and tibial nerves) along with prolonged motor distal latencies (significant in median, ulnar and tibial nerves) among RTs compared to healthy individuals. Conclusion: Chronic low-dose exposure of ionising radiation causes sub-clinical neuropathies affecting both sensory and motor nerves.
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32

Zhou, Jianhua, Aibing Yu, and Yuwen Zhang. "A Boundary Element Method for Evaluation of the Effective Thermal Conductivity of Packed Beds." Journal of Heat Transfer 129, no. 3 (June 6, 2006): 363–71. http://dx.doi.org/10.1115/1.2430721.

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The problem of evaluating the effective thermal conductivity of random packed beds is of great interest to a wide-range of engineers and scientists. This study presents a boundary element model (BEM) for the prediction of the effective thermal conductivity of a two-dimensional packed bed. The model accounts for four heat transfer mechanisms: (1) conduction through the solid; (2) conduction through the contact area between particles; (3) radiation between solid surfaces; and (4) conduction through the fluid phase. The radiation heat exchange between solid surfaces is simulated by the net-radiation method. Two regular packing configurations, square array and hexagonal array, are chosen as illustrative examples. The comparison between the results obtained by the present model and the existing predictions are made and the agreement is very good. The proposed BEM model provides a new tool for evaluating the effective thermal conductivity of the packed beds.
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33

Naveira-Cotta, Carolina P., Mohammed Lachi, Mourad Rebay, and Renato M. Cotta. "Experiments and Simulations in Transient Conjugated Conduction-Convection-Radiation." Heat Transfer Research 41, no. 3 (2010): 209–31. http://dx.doi.org/10.1615/heattransres.v41.i3.20.

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34

Kamiuto, K., M. Iwamoto, and Y. Nagumo. "Combined conduction and correlated-radiation heat transfer in packedbeds." Journal of Thermophysics and Heat Transfer 7, no. 3 (July 1993): 496–501. http://dx.doi.org/10.2514/3.445.

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35

Nakamura, Toshiya, and Takashi Kai. "Combined Radiation-Conduction Analysis of Fibrous Ceramic Tile Insulation." JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 51, no. 598 (2003): 641–46. http://dx.doi.org/10.2322/jjsass.51.641.

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36

Sun, Ya-Song, and Ben-Wen Li. "Spectral Collocation Method for Transient Conduction-Radiation Heat Transfer." Journal of Thermophysics and Heat Transfer 24, no. 4 (October 2010): 823–32. http://dx.doi.org/10.2514/1.43400.

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37

Rupp, I., and C. Péniguel. "Coupling heat conduction, radiation and convection in complex geometries." International Journal of Numerical Methods for Heat & Fluid Flow 9, no. 3 (May 1999): 240–64. http://dx.doi.org/10.1108/09615539910260112.

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38

Li, H. Y. "Estimation of thermal properties in combined conduction and radiation." International Journal of Heat and Mass Transfer 42, no. 3 (February 1999): 565–72. http://dx.doi.org/10.1016/s0017-9310(98)00146-x.

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39

OCHIAI, Akihiro, Mitsuho Nakakura, and Koji MATSUBARA. "Conjugate Radiation-Convection-Conduction Simulation for Porous Solar Receiver." Proceedings of Conference of Hokuriku-Shinetsu Branch 2020.57 (2020): G031. http://dx.doi.org/10.1299/jsmehs.2020.57.g031.

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40

BLOUQUIN, RODOLPHE, and GUY JOULIN. "On a Variational Principle for Reaction/Radiation/Conduction Equilibria." Combustion Science and Technology 112, no. 1 (January 1996): 375–85. http://dx.doi.org/10.1080/00102209608951968.

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41

Banerjee, Sonali, and Wayne A. Anderson. "Conduction Mechanisms in Radiation Damaged MINP Si Solar Cells." IEEE Transactions on Nuclear Science 33, no. 6 (1986): 1474–81. http://dx.doi.org/10.1109/tns.1986.4334626.

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42

Hossain, M. A., and H. S. Takhar. "Radiation-conduction interaction in mixed convection along rotating bodies." Heat and Mass Transfer 33, no. 3 (December 11, 1997): 201–8. http://dx.doi.org/10.1007/s002310050179.

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43

Mahfooz, S. M., and M. A. Hossain. "Conduction-radiation effect on transient natural convection with thermophoresis." Applied Mathematics and Mechanics 33, no. 3 (March 2012): 271–88. http://dx.doi.org/10.1007/s10483-012-1549-6.

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44

Yao, Yanzhong, Shuai Miao, and Guixia Lv. "An efficient iterative method for radiation heat conduction problems." International Journal for Numerical Methods in Fluids 93, no. 7 (April 15, 2021): 2362–79. http://dx.doi.org/10.1002/fld.4977.

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45

Cheng, Tien-Chun, Chung-Jen Tseng, Ling-Chia Weng, and Shih-Kuo Wu. "Combined natural convection and radiation with temperature-dependent properties." Thermal Science 22, no. 2 (2018): 921–30. http://dx.doi.org/10.2298/tsci160225171c.

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This paper investigates the effects of temperature dependence of radiative properties of a medium on radiation and natural convection interaction in a rectangular enclosure. The radiative transfer equation is solved using the discrete ordinates method, and the momentum, continuity, and energy equations are solved by the finite volume method. Effects of the conduction-to-radiation parameter, Rayleigh number, and optical thickness are discussed. Results show that temperature dependence of radiative properties affects the temperature gradient, and hence the energy transport even in relatively weak radiation condition. On the other hand, temperature dependence of radiative properties has relatively insignificant effects on convection characteristics, even though it does affect the way that energy transfers into the system. As conduction-to-radiation parameter is decreased or Rayleigh number is increased, the effects of temperature dependence of radiative properties become more significant.
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46

Ali, M. M., A. A. Mamun, and M. A. Maleque. "Radiation and heat generation effects on viscous Joule heating MHD-conjugate heat transfer for a vertical flat plate." Canadian Journal of Physics 92, no. 6 (June 2014): 509–21. http://dx.doi.org/10.1139/cjp-2013-0254.

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Conjugate heat transfer formed by the coupling effect of conduction inside and free convection flow along the flat plate is analyzed. The Joule heating effect because of considered magnetohydrodynamics (MHD) along with viscous dissipation, heat generation, and radiation phenomena are included in the investigation. The converted dimensionless partial differential equations representing the aforementioned flow characteristics are transformed into nonlinear equations with the help of a stream function with similarity variable. Finally, a numerical solution is carried out using the implicit finite difference method to analyze the flow behaviors in terms of velocity, temperature, skin friction coefficient, heat transfer rate, and surface temperature. A complete parametric analysis is done on the numerical results to show the effects of the radiation parameter, magnetic parameter, Eckert number, heat generation parameter, conjugate conduction parameter, and Prandtl number. It is found that thermal radiation, viscous Joule heating, and internal heat generation in the presence of axial conduction effects have a significant effect on MHD natural convection flow and thermal fields.
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47

Siegel, R. "Transient Thermal Effects of Radiant Energy in Translucent Materials." Journal of Heat Transfer 120, no. 1 (February 1, 1998): 4–23. http://dx.doi.org/10.1115/1.2830063.

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When a solid or stationary fluid is translucent, energy can be transferred internally by radiation in addition to heat conduction. Since radiant propagation is very rapid, it can provide energy within a material more quickly than diffusion by heat conduction. Radiation emitted in a hot material can also be distributed rapidly in the interior. The result is that transient temperature responses including radiation can be significantly different from those by conduction alone. This is important for evaluating the thermal performance of translucent materials that are at elevated temperatures, are in high temperature surroundings, or are subjected to large incident radiation. Detailed transient solutions are necessary to examine heat transfer for forming and tempering of glass windows, evaluating ceramic components and thermal protection coatings, studying highly backscattering heat shields for atmospheric reentry, porous ceramic insulation systems, ignition and flame spread for translucent plastics, removal of ice layers, and other scientific and engineering applications involving heating and forming of optical materials. Radiation effects have been studied less for transients than for steady state because of the additional mathematical and computational complexities, but an appreciable literature has gradually developed. This paper will review the applications, types of conditions, and geometries that have been studied. Results from the literature are used to illustrate typical radiation effects on transient temperatures, and comparisons are made of transient measurements with numerical solutions.
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48

Dehghan, A. A., and M. Behnia. "Combined Natural Convection–Conduction and Radiation Heat Transfer in a Discretely Heated Open Cavity." Journal of Heat Transfer 118, no. 1 (February 1, 1996): 56–64. http://dx.doi.org/10.1115/1.2824068.

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Combined natural convection, conduction, and radiation heat transfer in an open-top upright cavity containing a discrete heat source has been modeled numerically. The surface emissivity has been varied and its effects on the flow and thermal fields have been determined for different values of Rayleigh number. The complex interaction of the three modes of heat transfer mechanisms is explored by solving the coupled convection, conduction, and radiation equations. It is noted that the inclusion of radiation has a significant effect on the flow, resulting in the formation of a recirculation zone within the cavity. Comparison of the local heat transfer coefficients for the conjugate analysis and no radiation case reveals that the inclusion of radiation has a negligible effect on the heat transfer performance of the heat source. However, comparison of the numerical results with experimental observations shows that accurate prediction of the flow and thermal fields is strongly dependent on the consideration of radiation heat transfer in the numerical case.
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49

Schneider, Evandro Pedro, Edgar Ricardo Schöffel, and José Carlos Fachinello. "Solar radiation absorption according to the tree crown conduction and the effects on peach cultivars production." Comunicata Scientiae 8, no. 2 (February 1, 2018): 367–74. http://dx.doi.org/10.14295/cs.v8i2.2376.

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In order to reach high productive efficiency, three training systems of the crown in peach trees were evaluated for the efficiency of absorption of solar radiation, aiming to identifying which system of conduction can provide a higher absorption of solar radiation and its effects on the production of the ‘Eldorado’ and ‘Jubileu’ peach cultivars. The crown of the trees were conducted in Central Leader, Y-shape and in open Vase systems. Measuring the global solar radiation, reflected solar radiation and the transmitted solar radiation, it was possible to obtain the absorbed solar radiation and the efficiency in radiation absorption by each system of conduction. The ‘Jubileu’ and ‘Eldorado’ peach trees were not different for the solar radiation absorption. The Central Leader and open Vase systems present capacity to retain up to 75% of the solar incident radiation while the Y-shape system retains up to 45% of the radiation. The peach production in the open Vase system resulted in 36.1 kg plant-1, higher than 25.47 kg plant-1 obtained in the Central Leader system, while the production in Y-shape system reached the production of 29.85 kg plant-1.
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50

Snooks, S. J., and M. Swash. "Motor conduction velocity in the human spinal cord: slowed conduction in multiple sclerosis and radiation myelopathy." Journal of Neurology, Neurosurgery & Psychiatry 48, no. 11 (November 1, 1985): 1135–39. http://dx.doi.org/10.1136/jnnp.48.11.1135.

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