Temperature Dependent Thermal Conductivity Measurement on Biological Materials by Solving Inverse Heat Conduction Problem: A Theoretical Study

2003 ◽  
Author(s):  
Dawei Luo ◽  
Tzu Fang Chen ◽  
Sui Lin ◽  
Liqun He ◽  
Dayong Gao
Keyword(s):  
Thermal Conductivity ◽  
Heat Conduction ◽  
Theoretical Study ◽  
Heat Conduction Problem ◽  
Conductivity Measurement ◽  
Inverse Heat Conduction Problem ◽  
Thermal Conductivity Measurement ◽  
Inverse Heat Conduction ◽  
Temperature Dependent ◽  
Temperature Dependent Thermal Conductivity

Inverse Heat Conduction in a Composite Slab With Pyrolysis Effect and Temperature-Dependent Thermophysical Properties

2009 ◽  
Vol 132 (3) ◽  
Author(s):  
Jianhua Zhou ◽  
Yuwen Zhang ◽  
J. K. Chen ◽  
Z. C. Feng
Keyword(s):  
Heat Conduction ◽  
Heat Conduction Problem ◽  
Front Surface ◽  
Inverse Heat Conduction Problem ◽  
Inverse Heat Conduction ◽  
Temperature Dependent ◽  
Iterative Regularization ◽  
Composite Slab ◽  
Nonlinear Conjugate Gradient Method ◽  
Rate Dependent

The inverse heat conduction problem (IHCP) in a one-dimensional composite slab with rate-dependent pyrolysis chemical reaction and outgassing flow effects is investigated using the iterative regularization approach. The thermal properties of the composites are considered to be temperature-dependent. A nonlinear conjugate gradient method formulation is developed and applied to solve the IHCP in an organic composite slab whose front-surface is subjected to high intensity periodic laser heating.

Inverse Heat Conduction Problem of the Temperature Field with Artificial Ground Freezing Method

2011 ◽  
Vol 243-249 ◽  
pp. 89-92
Author(s):  
Shi Liang Xu
Keyword(s):  
Thermal Conductivity ◽  
Temperature Field ◽  
Heat Conduction ◽  
Heat Conduction Problem ◽  
Back Analysis ◽  
Inverse Heat Conduction Problem ◽  
Frozen Soil ◽  
Inverse Heat Conduction ◽  
Ground Freezing ◽  
Artificial Ground Freezing

The Artificial Ground Freezing (AGF) Method play an important role in the geotechnical engineering and the back analysis of thermal conductivity of frozen soil is the main inverse heat conduction problem of temperature field. In this paper the physical modelling test of AGF is carried out with double-row-pipe freezing in the lab. According to the measured temperature, the back analysis of thermal conductivity of frozen soil is solved based on the two-dimensional finite element simulation and the least square principle. It is helpful to investigate the freezing process and determine the frozen wall thickness.

Numerical Solution of the General Two-Dimensional Inverse Heat Conduction Problem (IHCP)

1997 ◽  
Vol 119 (1) ◽  
pp. 38-45 ◽  
Author(s):  
A. M. Osman ◽  
K. J. Dowding ◽  
J. V. Beck
Keyword(s):  
Experimental Data ◽  
Heat Conduction ◽  
Heat Conduction Problem ◽  
Regularization Parameter ◽  
Simulated Data ◽  
Inverse Heat Conduction Problem ◽  
Transient Temperature ◽  
Two Dimensional ◽  
Inverse Heat Conduction ◽  
Temperature Dependent

This paper presents a method for calculating the heat flux at the surface of a body from experimentally measured transient temperature data, which has been called the inverse heat conduction problem (IHCP). The analysis allows for two-dimensional heat flow in an arbitrarily shaped body and orthotropic temperature dependent thermal properties. A combined function specification and regularization method is used to solve the IHCP with a sequential-in-time concept used to improve the computational efficiency. To enhance the accuracy, the future information used in the sequential-in-time method and the regularization parameter are variable during the analysis. An example using numerically simulated data is presented to demonstrate the application of the method. Finally, a case using actual experimental data is presented. For this case, the boundary condition was experimentally measured and hence, it was known. A good comparison is demonstrated between the known and estimated boundary conditions for the analysis of the numerical, as well as the experimental data.

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