SENSITIVITY ANALYSIS OF TRANSIENT TEMPERATURE FIELD IN MICRODOMAINS WITH RESPECT TO THE DUAL-PHASE-LAG MODEL PARAMETERS

2014 ◽  
Vol 12 (1) ◽  
pp. 65-77 ◽  
Author(s):  
Ewa Majchrzak ◽  
Bohdan Mochnacki
Keyword(s):  
Sensitivity Analysis ◽  
Temperature Field ◽  
Transient Temperature ◽  
Model Parameters ◽  
Phase Lag ◽  
Dual Phase ◽  
Transient Temperature Field ◽  
Lag Model

Analysis of Dual Phase Lag Heat Conduction in Gold Nanoparticle Based Hyperthermia Treatment

2008 ◽  
Author(s):  
C. Liu ◽  
B. Q. Li ◽  
C. Mi
Keyword(s):  
Heat Conduction ◽  
Gold Nanoparticle ◽  
Tissue Temperature ◽  
Surrounding Tissue ◽  
Transient Temperature ◽  
Short Time Scale ◽  
Phase Lag ◽  
Dual Phase ◽  
Hyperthermia Treatment ◽  
Lag Model

This paper addresses the fast-transient heat conduction phenomena of a gold nanoparticle embedded in cancerous tissue in hyperthermia treatment. Dual phase lag model in spherical coordinates was employed and a semi-analytical solution of 1-D non-homogenous dual phase lag equation was presented. Results show that transient temperature depends dramatically on the lagging characteristic time of the surrounding tissue. Temperature predicted by dual phase lag model greatly exceeds that predicted by a classical diffusion model, with either a constant source or a pulsed source. This phenomenon is mainly attributed by the phase lag of heat flux of tissue. The overheating in short time scale and the consequent biological effect needs to be paid more attention in the related study.

Sensitivity Analysis of Temperature Field in Domain of Skin Tissue with Respect to Perturbations of Protective Clothing Parameters

2015 ◽  
Vol 362 ◽  
pp. 13-22
Author(s):  
Bohdan Mochnacki ◽  
Ewa Majchrzak
Keyword(s):  
Sensitivity Analysis ◽  
Numerical Modeling ◽  
Temperature Field ◽  
Protective Clothing ◽  
Initial Conditions ◽  
Skin Tissue ◽  
Transient Temperature ◽  
Geometrical Properties ◽  
Transient Temperature Field ◽  
The Impact

The aim of considerations is the numerical modeling of thermal processes proceeding in the system external heat source - protective clothing - air gap - human skin and next the application of sensitivity analysis methods to study the impact of clothing parameters on the transient temperature field in domain of skin tissue. From the mathematical point of view the problem is described by the system of Fourier and Pennes equations determining the transient temperature field in the successive sub-domains. This system is supplemented by the appropriate boundary and initial conditions. Taking into account the geometrical properties of the domain considered, the 1D solution seems to be sufficiently exact (e.g. chest or back). The sensitivity model is constructed on the basis of the so-called direct approach. The equations creating the mathematical model of the process considered are differentiated with respect to selected parameter. At the stage of numerical modeling the 1st scheme of the boundary element method for parabolic equations has been used.

The initial stress effect on a thermoelastic micro-elongated solid under the dual-phase-lag model

2021 ◽  
Vol 127 (9) ◽  
Author(s):  
Mohamed I. A. Othman ◽  
Sarhan Y. Atwa ◽  
Ebtesam E. M. Eraki ◽  
Mohamed F. Ismail
Keyword(s):  
Initial Stress ◽  
Stress Effect ◽  
Phase Lag ◽  
Dual Phase ◽  
Lag Model

Thermoelastic Bresse system with dual-phase-lag model

2021 ◽  
Vol 72 (3) ◽  
Author(s):  
Noelia Bazarra ◽  
Ivana Bochicchio ◽  
José R. Fernández ◽  
Maria Grazia Naso
Keyword(s):  
Phase Lag ◽  
Dual Phase ◽  
Bresse System ◽  
Lag Model
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