TY - JOUR
T1 - Novel Transmission Open Photoacoustic Cell Configuration for Thermal Diffusivity Measurements in Liquids
AU - Balderas-López, J. A.
AU - Mandelis, A.
N1 - Funding Information:
The authors wish to acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) through a Research Grant to AM.
PY - 2002/5
Y1 - 2002/5
N2 - In this paper the photoacoustic technique in the thermal-wave transmission configuration is applied to thermal diffusivity measurements in liquids. The one-dimensional heat diffusion problem involving three layers, and assuming surface absorption only, is solved for this goal. Linear relations among the photoacoustic amplitude (on a semi-log scale) and phase, as functions of the liquid sample thickness, are shown in each case. An analytical procedure involving linear fits to the experimental data is developed to produce two independent values for thermal diffusivity. The thermal diffusivity of three homogeneous liquids (distilled water, ethylene-glycol, and olive oil) was measured, and excellent agreement was obtained between results from both the amplitude and phase, as well as with thermal-diffusivity values reported in the literature.
AB - In this paper the photoacoustic technique in the thermal-wave transmission configuration is applied to thermal diffusivity measurements in liquids. The one-dimensional heat diffusion problem involving three layers, and assuming surface absorption only, is solved for this goal. Linear relations among the photoacoustic amplitude (on a semi-log scale) and phase, as functions of the liquid sample thickness, are shown in each case. An analytical procedure involving linear fits to the experimental data is developed to produce two independent values for thermal diffusivity. The thermal diffusivity of three homogeneous liquids (distilled water, ethylene-glycol, and olive oil) was measured, and excellent agreement was obtained between results from both the amplitude and phase, as well as with thermal-diffusivity values reported in the literature.
KW - Liquids
KW - Open photoacoustic cell
KW - Photoacoustic technique
KW - Thermal diffusivity
UR - http://www.scopus.com/inward/record.url?scp=0012630144&partnerID=8YFLogxK
U2 - 10.1023/A:1015418218392
DO - 10.1023/A:1015418218392
M3 - Artículo
SN - 0195-928X
VL - 23
SP - 605
EP - 614
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
IS - 3
ER -