The Effect of Pressure on the Sound Velocity and Density of Toluene andn-heptane up to 2600 bar

An Improved Application of the Transient Hot-Wire Technique for the Absolute Accurate Measurement of the Thermal Conductivity of Pyroceram 9606 up to 420 K

“…2, the temperature rise versus the logarithm of the time is shown. The thermal conductivity value obtained from the superimposition of the COMSOL calculated values and the experimental ones, deviates by 0.4 % from the aforementioned recommended value, whereas the product (density × specific heat capacity) was found to deviate by ±0.3 % from literature values [9,10].…”

Speed of sound, density, and compressibility of petroleum fractions from ultrasonic measurements under pressure

“…The second one, which is associated with the pressure gauge (HBM P3M), leads to an error in u of ± 0.1 per cent at most. The density was determined up to p = 150 MPa from speed of sound measurements and the thermodynamic relationships (8,9) which relate the speed of sound to the isentropic and isothermal compressibilities κ S and κ T : in which α designates the cubic expansion coefficient and C p the isobaric heat capacity.…”

Compressibilities of ternary mixtures C1-nC16-CO2 under pressure from ultrasonic measurements of sound speed

“…(2) is evaluated directly from the speed of sound measurements. The second integral term, the value of which represents only a few percent of the first, can be calculated iteratively by Davis and Gordon's method [7] modified by Muringer et al [8]. The procedure, which was developed to extend atmospheric pressure measurements on pure substances to high pressures, requires the further knowledge of Cp(T), p(T), and c~(T) at a given initial pressure in order to begin the iterative process, a requirement which is not satisfied here.…”