Attainable superheat of argon-helium, argon-neon solutions.
The method of lifetime measurement has been used to investigate the kinetics of spontaneous boiling-up of superheated argon-helium and argon-neon solutions. Experiments were made at a pressure of p = 1.5 MPa and concentrations up to 0.33 mol% in the range of nucleation rates from 10 (4) to 10 (8) s (-1) m (-3). The homogeneous nucleation regime has been distinguished. With good agreement between experimental data and homogeneous nucleation theory in temperature and concentration dependences of the nucleation rate, a systematic underestimation by 0.25-0.34 K has been revealed in superheat temperatures over the saturated line attained by experiment as compared with theoretical values calculated in a macroscopic approximation. The revealed disagreement between theory and experiment is connected with the dependence of the properties of new-phase nuclei on their size.
Baidakov
Vladimir G
VG
Institute of Thermal Physics, Urals Branch of Russian Academy of Sciences, Ekaterinburg, Russia. bai@itp.uran.ru
Kaverin
Aleksey M
AM
Andbaeva
Valentina N
VN