Heat transfer in rarefied couette flow on the basis of discrete ordinate method

1971 ◽  
Vol 24 (1) ◽  
pp. 467-476 ◽  
Author(s):  
J. R. Saraf
Keyword(s):  
Heat Transfer ◽  
Couette Flow ◽  
Discrete Ordinate Method ◽  
Discrete Ordinate

Simulation of Focused Radiation Propagation and Transient Heat Transfer in Turbid Tissues

2009 ◽  
Author(s):  
Jian Jiao ◽  
Zhixiong Guo
Keyword(s):  
Heat Transfer ◽  
Thermal Analysis ◽  
Pulse Train ◽  
Radiation Transport ◽  
Time Dependent ◽  
Transfer Model ◽  
Discrete Ordinate Method ◽  
Discrete Ordinate ◽  
Physiological Properties ◽  
Focused Beam

Thermal analysis of a cylindrical tissue subject to a train of ultrashort pulse irradiations was made by developing a combined time-dependent radiation and conduction bio-heat transfer model. Ultrashort pulsed radiation transport in the cylindrical tissue is simulated using the transient discrete ordinate method. Treatment of focused beam is introduced. The model skin tissue is stratified as three layers with different optical, thermal and physiological properties. Comparisons between the collimated irradiation and focused beam are conducted. The effect of pulse train is investigated.

Radiative Heat Transfer Using Isotropic Scaling Approximation: Application to Fibrous Medium

2004 ◽  
Author(s):  
Herve´ T. Kamdem Tagne ◽  
Dominique Doermann Baillis
Keyword(s):  
Heat Transfer ◽  
Radiative Heat ◽  
Radiative Transfer Equation ◽  
Scattering Problem ◽  
Anisotropic Scattering ◽  
Radiative Properties ◽  
Heat Transfer Analysis ◽  
Discrete Ordinate Method ◽  
Discrete Ordinate ◽  
Fibrous Medium

The applicability of the isotropic scaling approximation to heat transfer analysis in fibrous medium is discussed. The isotropic scaling model allows the transformation of an anisotropic scattering problem to an isotropic one. The scaled parameters are derived for general anisotropic scattering and for radiative properties dependent of the incidence direction such as for fibrous medium. The fibers are randomly oriented either in space or parallel to the boundaries of the medium. The radiative transfer equation is solved with the discrete ordinate method and comparisons between the exact and the isotropic scaling problems for several Gauss quadrature are studied.

scholarly journals Numerical Calculation of Radiative Heat Transfer in Two-dimensional Rectangular Zone

2019 ◽  
Vol 5 (5) ◽  
pp. 13-18
Author(s):  
A. Abdullin
Keyword(s):  
Heat Transfer ◽  
Radiative Heat ◽  
Homogeneous Medium ◽  
Discrete Ordinate Method ◽  
Two Dimensional ◽  
Discrete Ordinate ◽  
Zonal Method ◽  
Absorbing Medium ◽  
Calculation Results ◽  
Heat Transfer By Radiation

The accuracy of the P1-approximation of the spherical harmonic’s method and the S2-approximation of the discrete ordinate method for calculating heat transfer by radiation are analyzed. The cases of an isotropically scattering homogeneous medium and a homogeneous absorbing medium are considered. The calculation results are compared with the exact solution, the P3-approximation and the zonal method. It is shown that the accuracy of the S2-approximation is higher compared to the P1-approximation at small and intermediate values of the optical thickness of the medium.

DNS OF TURBULENT HEAT TRANSFER IN PLANE COUETTE FLOW

Equipment ◽  
2006 ◽  
Author(s):  
S. Hane ◽  
T. Tsukahara ◽  
K. Iwamoto ◽  
H. Kawamura
Keyword(s):  
Heat Transfer ◽  
Couette Flow ◽  
Turbulent Heat Transfer ◽  
Turbulent Heat ◽  
Plane Couette Flow
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