A numerical model for vapour bubble nucleation

• Autorzy: Kern J. , Stephan P.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

boiling; microscale; nucleation

PL

skala mikro; wrzenie; zarodkowanie

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2005
• Tom: Vol. 26, no. 4
• Strony: 61--68
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Kern J.

• Darmstadt University of Technology, Peteresenstrasse 30, 64287 Darmstadt, Germany

autor

Stephan P.

• Darmstadt University of Technology, Peteresenstrasse 30, 64287 Darmstadt, Germany

Bibliografia

• [1] DHIR V.K.: Numerical simulations of pool-boiling heat transfer, AIChE J., Vol. 47 (2001), 813-834.
• [2] KERN J., STEPHAN P.: Theoretical model for nucleate boiling heat and mass transfer of binary mixtures, ASME J. Heat Transfer, Vol. 125 (2003), 1106-1115.
• [3] BANKOFF S.G.: Entrapment of gas in the spreading of a liquid over a rough surface, AIChE J., Vol. 4 (1958), 24-26.
• [4] LORENZ J.J., MIKIC B.B., ROHSENOW W.M.: The effect of surface conditions on boiling characteristics, Proc. 5th Int. Heat Transfer Conf., Vol. 4 (1974), 35-39.
• [5] FuCHS T., KERN J., STEPHAN P.: A transient nucleate boiling model including microscale effects and wall heat transfer, ASME Journal of Heat Transfer, submitted for publication.
• [6] WECKESSER M.: Untersuchungen zur Blasenbildurtg beim Sieden in freier Konvek-tion, PhD thesis, Universität Karlsruhe, 1990.
• [7] BUCHHOLZ M., AURACHER H.: Microsensors to study temperature fluctuations near the heating surface in pool boiling and two-phase characteristics, Proc. 8th UK National Heat Transfer Conf., Oxford, 9-10 Sept., 2003, CD-ROM.