Determination of the thermal diffusivity of aqueous solutions of methanol in an extended range of temperature by a laser-induced thermal grating technique

✍ Scribed by J. Wang; M. Fiebig

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 505 KB
• Volume: 13
• Category: Article
• ISSN: 0894-1777
• DOI: 10.1016/0894-1777(96)00012-x

✦ Synopsis

Experimental thermal diffusivity data are presented for aqueous solutions of methanol in the temperature range 295-335 K. The thermal diffusivity measurements were performed using a laser-induced thermal grating technique at atmospheric pressure. The aqueous solutions studied have weight fractions of 20, 40, 60, and 80% methanol. Because of the small temperature rise (AT < 0.2 K) in the thin sample (sample thickness d = 0.5 mm) during the measurements and the very short measuring time of a few milliseconds, the influence of free convection is negligible. The results converted to thermal conductivity show very good agreement with the experimental data in the literature.