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Measurement of temperaturę field around a single steady vapor bubble using phase shift interferometry

Stoica V., Stephan P.

Archives of Thermodynamics

2006

Vol. 27, no. 2

81-90

In the current paper, the local temperature around a single axial symmetric vapor bubble is measured using the phase shift interferometry. For this purpose the four frames technique, Itoh algorithm for phase unwrapping and Abe inversion for computing the local temperature from the mean one were used. For generating a single vapor bubble a special test cell was constructed. With this technique a high-resolution spatial temperature distribution has been determined.

A numerical model for vapour bubble nucleation

Kern J., Stephan P.

Archives of Thermodynamics

2005

Vol. 26, no. 4

61-68

A numerical model is presented to calculate heat and mass transfer during bubble nucleation. Microscopic effects, e.g. adhesion forces, are considered. Typical results of the computation, such as heat transfer to nuclei and bubble growth rates, are presented and compared to experimental data. The deviation between experimental and numerical growth rates is discussed by means of parameter studies. These studies indicate that the vapour inside the nucleus may be highly superheated compared to the saturation temperature.