Transient coupled heat transfer in a multi-layer composite with opaque specular surfaces and semitransparent specular interfaces

Abstract In this paper, one-dimensional transient coupled radiative and conductive heat transfer in a multi-layer absorbing and isotropic scattering composite is investigated. The composite is considered to be of opaque specular boundaries and semitransparent specular interfaces. In combination with ray tracing method, spectral band model and the Hottel and Sarofim's zonal method, the radiative transfer coefficients (RTCs) of the multi-layer composite are deduced. The RTCs are used to calculate the radiative heat source term in the transient energy control equation, which is solved by the fully implicit discrete control-volume method. The effects of refractive index and vacuum space on transient coupled heat transfer are analyzed. Except for refractive index, all the other parameters of each layer have been kept the same, and the total thickness also has been kept unchanged, then along the thickness of the composite when the decrement or the increment of refractive index decreases as layer number increases, the temperature profile becomes smoother and the steady heat flux increases.

[1]  M. N. Özişik,et al.  Combined conduction and radiation in a two-layer planar medium with flux boundary condition , 1987 .

[2]  M. Lallemand,et al.  Transient radiative—conductive heat transfer in flat glasses submitted to temperature, flux and mixed boundary conditions , 1989 .

[3]  R. Siegel,et al.  Effects of Refractive Index and Diffuse or Specular Boundaries on a Radiating Isothermal Layer , 1994 .

[4]  R. Siegel.  Transient Thermal Analysis of Parallel Translucent Layers by Using Green's Functions , 1999 .

[5]  R. Siegel.  Temperature Distributions in Channel Walls with Translucent Thermal Barrier Coatings , 1998 .

[6]  R. Viskanta,et al.  Measurement and prediction of dynamic temperatures in unsymmetrically cooled glass windows , 1993 .

[7]  R. Siegel.  Transient Heat Transfer in a Semitransparent Radiating Layer with Boundary Convection and Surface Reflections , 1996 .

[8]  R. Siegel.  Transient Thermal Effects of Radiant Energy in Translucent Materials , 1998 .

[9]  H. Tan,et al.  Transient Coupled Radiation and Conduction in a Three-Layer Composite With Semitransparent Specular Interfaces and Surfaces , 2002 .

[10]  R. Siegel.  Transient Thermal Analysis of a Translucent Thermal Barrier Coating on a Metal Wall , 1999 .

[11]  A. Degiovanni,et al.  A new way of solving transient radiative-conductive heat transfer problems , 1998 .

[12]  Jay I. Frankel,et al.  Cumulative variable formulation for transient conductive and radiative transport in participating media , 1995 .

[13]  G. Flamant,et al.  Effects of boundary properties on transient temperature distributions in condensed semitransparent media , 1990 .

[14]  William H. Sutton,et al.  Transient conductive and radiative heat transfer in a silica window , 1995 .

[15]  R. Viskanta,et al.  Heat transfer by simultaneous conduction and radiation for two absorbing media in intimate contact , 1969 .

[16]  R. Siegel.  Two-Flux Green's Function Analysis for Transient Spectral Radiation in a Composite , 1996 .

[17]  R. Siegel,et al.  Variable Refractive Index Effects on Radiation in Semitransparent Scattering Multilayered Regions , 1993 .

[18]  J. Fricke,et al.  Radiation-conduction interaction: an investigation on silica aerogels , 1996 .

[19]  H. Tan,et al.  Transient coupled radiative and conductive heat transfer in an absorbing, emitting and scattering medium , 1999 .

[20]  Ching-fen Tsai,et al.  TRANSIENT TEMPERATURE DISTRIBUTION OF A MULTILAYER COMPOSITE WALL WITH EFFECTS OF INTERNAL THERMAL RADIATION AND CONDUCTION , 1986 .