CFD estimation of heat losses in thermal conductivity measurements
Journal Title: Computer Assisted Methods in Engineering and Science - Year 2013, Vol 20, Issue 3
Abstract
Knowledge of a material thermal conductivity is essential in several engineering applications. This material property serves also as a measure of the quality of manufactured materials. Nowadays, a lot of effort is directed into development of non-destructive, fast and reliable measurement techniques. In the works of Adamczyk et al. [1] and Kruczek et al. [10], a new in situ conductivity measurement technique for an anisotropic material was developed. This method, due to its rapidity and nondestructive character, can be embedded in a manufacturing process. However, despite many advantages, the developed measuring technique has some drawbacks corresponding to the applied mathematical model, which is used for determining the material thermal conductivities. It neglects the effect of heat losses due to radiation and convection phenomena on the calculated values of thermal conductivities. In this work, the computational fluid dynamic (CFD) modeling was applied to estimate heat losses due to radiation and convection. The influence of omitting the radiative and convective heat transfer on the predicted temperature field and calculated thermal conductivities was investigated. Evaluated numerical results were compared against experimental data by using the developed in situ measurement technique for the thermal conductivity of anisotropic materials.
Authors and Affiliations
Wojciech Adamczyk, Filip Szelejewski, Paweł Kozołub, Ryszard Białecki, Tadeusz Kruczek
Keywords
Related Articles
- EP ID EP73645
- DOI -
- Views 166
- Downloads 0
A shift-add algorithm for generating B-spline
A CORDIC- based shift-add algorithm for generating B-spline curves is presented in this paper. This algorithm can be realized by hardware without multiplier, or coded with assembly language and run in the basic computing...
A mixed, scalable domain decomposition method for incompressible flow
This work deals with the construction of a mixed and extensible domain decomposition method for incompressible flows. In the scheme proposed here, the solution is sought at the intersection of two spaces, one containing...
Homogenization of composites with interfacial debonding using duality-based solver and micromechanics. (Received in the final form February 13, 2009).
One of the key aspects governing the mechanical performance of composite materials is debonding: the local separation of reinforcing constituents from matrix when the interfacial strength is exceeded. In this contributio...
Application of grammatical evolution to coefficient identification problem in two-dimensional elastic problem
Grammatical evolution (GE), which is a kind of evolutionary algorithms, is designed to find a function, an executable program or program fragment that will achieve a good fitness value for the given objective function to...
Delamination identification using machine learning methods and haar wavelets
The present paper focuses on the identification of delamination size and location in homogeneous and composite laminates. The modal analysis methods are employed to calculate the data patterns. An aggregated approach com...