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Title: Brillouin scattering study of equation of state of multicomponent liquids: Model oil samples

Journal Article · · J. Appl. Phys.; (United States)
DOI:https://doi.org/10.1063/1.341383· OSTI ID:6910565

Brillouin scattering technique has been used to measure the pressure dependence of sound velocity v/sub s/(P) in model oil samples (each containing 5-hydrocarbon liquids) at room temperature T = 20/sub 1/ /sup 0/C. Experimental results are reported on two blends of model oil, each containing a mixture of n-heptane, n-tetradecane, cyclo-hexane, benzene, and toluene in different volume fractions. The compositions of these two differed in their cyclohexane and toluene contents. The pressure dependence of v/sub s/(P) has been measured up to 815 bars and the results could be least-square fitted to v/sub s/(P) = A/sub 0/+A/sub 1/P+A/sub 2/P/sup 2/ within the limits of experimental error ( +- 1%). The modified Tait's equation and linear pressure dependence of bulk modulii have been used in consistence with an earlier work to interpret the parabolic pressure dependence of v/sub s/(P). This yields the values of Tait parameters (B and C) and hence allows the explicit pressure dependence of density and compressibility of these multicomponent liquids to be evaluated.

Research Organization:
Department of Physics, P.B. 1048, University of Oslo, Blindern, 0316 Oslo-3, Norway
OSTI ID:
6910565
Journal Information:
J. Appl. Phys.; (United States), Vol. 64:7
Country of Publication:
United States
Language:
English