Numerical simulation of the optical radiation absorption by dielectric microcapsules of different spatial shapes

2021 ◽  
Author(s):  
Yury E. Geints ◽  
Ekaterina K. Panina
Keyword(s):  
Numerical Simulation ◽  
Optical Radiation ◽  
Radiation Absorption ◽  
Optical Radiation Absorption

scholarly journals Numerical simulation of changes in the electric properties of biological tissues under local heating by laser radiation

2021 ◽  
Vol 2090 (1) ◽  
pp. 012049
Author(s):  
N V Kovalenko ◽  
A V Smirnov ◽  
O A Ryabushkin
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Laser Radiation ◽  
Optical Radiation ◽  
Local Heating ◽  
Biological Tissues ◽  
Electric Properties ◽  
Reliable Tool ◽  
The Mathematical Model

Abstract The mathematical model that describes the local heating of biological tissues by optical radiation is introduced. Changes of the electric properties of biological tissues in such process can be used as a reliable tool for analyzing heating and damage degrees of tissues.

Local Radiation Heating Technique of Polymeric Materials Using Functional-Dye

2007 ◽  
Author(s):  
Takushi Saito ◽  
Isao Satoh ◽  
Tatsuya Kawaguchi
Keyword(s):  
Numerical Simulation ◽  
Local Heating ◽  
Polymeric Materials ◽  
Surface Region ◽  
Experimental Result ◽  
Radiation Absorption ◽  
Dimensional System ◽  
Radiation Heating ◽  
Initial State ◽  
Photochromic Dye

In this study, the authors added a functional dye to a material which was transparent in initial state, to locally change the radiation absorption coefficient of the material. By using this material, we proposed a radiation heating technique that can achieve a selective local heating in three-dimensional system and investigated its feasibility. Temperature change of the test sample was measured in the experiment, and the characteristic of the presenting technique was investigated. To obtain better understanding of the presenting technique, numerical simulation of the temperature distribution inside the sample was also performed. In the experiment, photochromic dye and thermochromic dye were used as functional dyes and they were individually added to thermoplastic polymeric material (polystyrene) by using organic solvent (tetrahydrofuran). Then the material containing the dye was dried and processed to give a certain shape for the experiment. He-Cd laser and Ar ion laser were properly used as the excitation and the heat sources according to the type of dye. Experimental result showed that local heating of the material was achieved only in quite thin surface region in case of photochromic dye. On the other hand, local heating inside the material was successfully achieved in case of thermochromic dye. However, it was also observed that the heating point was moved to the upstream direction of the laser beam. To examine the solution of this problem, effect of the laser irradiation conditions on the moving speed of the heating point was discussed based on the numerical simulation results.

Modeling the process of heat transfer in a moving medium in the nonlinear regime

2008 ◽  
Vol 6 ◽  
pp. 160-164
Author(s):  
I.L. Khabibullin ◽  
A.T. Khamitov
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Temperature Field ◽  
Heat Exchange ◽  
Absorption Coefficient ◽  
Surrounding Medium ◽  
Radiation Absorption ◽  
Simulation Methods ◽  
Moving Medium ◽  
Numerical Simulation Methods

Numerical simulation methods are used to study the dynamics of the temperature field when the moving medium is heated by electromagnetic radiation, taking into account the dependence of the radiation absorption coefficient on temperature and heat exchange with the surrounding medium.

Water uptake by substituted amylose tablets: experimentation and numerical simulation

2009 ◽  
Vol 00 (00) ◽  
pp. 090904073309027-8
Author(s):  
H.W. Wang ◽  
S. Kyriacos ◽  
L. Cartilier
Keyword(s):  
Numerical Simulation ◽  
Water Uptake
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