Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques
Two experimental arrangements have been used to measure the thermal diffusivity at room temperature for ten species of Malaysian wood using photoflash and photoacoustic (PA) techniques. Both use circular disc samples with thickness 1 to 2 mm and 100 to 200 μm respectively. In the photoflash experim...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Malaysian Solid State Science and Technology Society
2003
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| Online Access: | http://psasir.upm.edu.my/id/eprint/42195/ http://psasir.upm.edu.my/id/eprint/42195/1/Measurement%20of%20thermal%20diffusivity.pdf |
| _version_ | 1848849899455512576 |
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| author | Chia, Pei Fung Mat Yunus, Wan Mahmood Abdul Wahab, Zaidan Mohd Tahir, Paridah |
| author_facet | Chia, Pei Fung Mat Yunus, Wan Mahmood Abdul Wahab, Zaidan Mohd Tahir, Paridah |
| author_sort | Chia, Pei Fung |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Two experimental arrangements have been used to measure the thermal diffusivity at room temperature for ten species of Malaysian wood using photoflash and photoacoustic (PA) techniques. Both use circular disc samples with thickness 1 to 2 mm and 100 to 200 μm respectively. In the photoflash experiment, a flash pulse is irradiated onto the front surface of the sample. The time dependence of the temperature response at the back surface of the sample is measured using a K-type thermocouple. On the other hand, the PA experimental configuration uses a closed photoacoustic (PA) cell that serves as a pressure sensor as well as an acoustic chamber. It is based upon the measurement of the acoustic signal as a function of the modulation frequency in the region where the sample is thermally thick. Both experimental data are then used to calculate thermal diffusivity using appropriate analytical expressions. Scanning electron microscopy (SEM) observation has also been done on both radial and tangential surface of the samples. The results are in good agreement within experimental error, hence validating the experimental measurements. |
| first_indexed | 2025-11-15T09:57:43Z |
| format | Article |
| id | upm-42195 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:57:43Z |
| publishDate | 2003 |
| publisher | Malaysian Solid State Science and Technology Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-421952016-04-12T01:48:21Z http://psasir.upm.edu.my/id/eprint/42195/ Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques Chia, Pei Fung Mat Yunus, Wan Mahmood Abdul Wahab, Zaidan Mohd Tahir, Paridah Two experimental arrangements have been used to measure the thermal diffusivity at room temperature for ten species of Malaysian wood using photoflash and photoacoustic (PA) techniques. Both use circular disc samples with thickness 1 to 2 mm and 100 to 200 μm respectively. In the photoflash experiment, a flash pulse is irradiated onto the front surface of the sample. The time dependence of the temperature response at the back surface of the sample is measured using a K-type thermocouple. On the other hand, the PA experimental configuration uses a closed photoacoustic (PA) cell that serves as a pressure sensor as well as an acoustic chamber. It is based upon the measurement of the acoustic signal as a function of the modulation frequency in the region where the sample is thermally thick. Both experimental data are then used to calculate thermal diffusivity using appropriate analytical expressions. Scanning electron microscopy (SEM) observation has also been done on both radial and tangential surface of the samples. The results are in good agreement within experimental error, hence validating the experimental measurements. Malaysian Solid State Science and Technology Society 2003 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/42195/1/Measurement%20of%20thermal%20diffusivity.pdf Chia, Pei Fung and Mat Yunus, Wan Mahmood and Abdul Wahab, Zaidan and Mohd Tahir, Paridah (2003) Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques. Solid State Science and Technology, 11 (1). pp. 51-58. ISSN 0128-7389 http://masshp.net/journal/all%20journal/VOLUME%2011%20NO.%201,%202003/htm/Vol.%2011,%20No%201%20%282003%29%2051-58.htm |
| spellingShingle | Chia, Pei Fung Mat Yunus, Wan Mahmood Abdul Wahab, Zaidan Mohd Tahir, Paridah Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques |
| title | Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques |
| title_full | Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques |
| title_fullStr | Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques |
| title_full_unstemmed | Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques |
| title_short | Measurement of thermal diffusivity of Malaysian wood using photoflash and photoacoustic techniques |
| title_sort | measurement of thermal diffusivity of malaysian wood using photoflash and photoacoustic techniques |
| url | http://psasir.upm.edu.my/id/eprint/42195/ http://psasir.upm.edu.my/id/eprint/42195/ http://psasir.upm.edu.my/id/eprint/42195/1/Measurement%20of%20thermal%20diffusivity.pdf |