2000 Fiscal Year Final Research Report Summary
Effective Thermal Conductivity of Cloth With Moisture Diffusion
| Project/Area Number |
11650203
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Akita University |
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Principal Investigator |
TAKAHASHI Kaneko Akita University, Faculty of Education and Human Studies, Associate Professor, 教育文化学部, 助教授 (40108923)
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| Co-Investigator(Kenkyū-buntansha) |
YAMDA Etsuro Akita University, Faculty of Engineering and Resource Science, Professor, 工学資源学部, 教授 (90006651)
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| Project Period (FY) |
1999 – 2000
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| Keywords | Cloth / Moisture Diffusion / Heat Transfer Model / Thermal Conductivity / Thermal Diffusivity |
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| Research Abstract |
Main results obtained in this study are as follows :
1. Improvement of experimental appratus and experiment by using local hygrometer
In the piled cloths, there are the differences between total mean effective thermal conductivity and local one. To clear these phenomena, we had been developed the local hygrometer that could measure humidity values at arbitrary position in the piled cloths.
We found out qualitative trend, but the data have large scattering. Therefore, we must do more accurate experiment to obtain the quantitative correlation.
2. Propose of the improved piled cloth model and numerical simulation
The improved model for piled cloths and fibrous composite matrerials has been proposed. The temperature responce and evaluation of thermal diffusivity were studied on the period-ical heating phenomena by using numerical simulation based on finite difference method. Investigated factors were thermal diffusivity, heat capacity of component materials and period of temperature wave. A new method to evaluate thermal diffusivity was also proposed by measuring the amplitude at the rear surface of specimen having finite thickness.
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