Physics – Fluid Dynamics
Scientific paper
2010-09-13
Eur. Phys. J. B. 79, (2011) 107
Physics
Fluid Dynamics
22 Pages, 11 figures, one of them is colour, we plan to publish it in Eur. Phys. J. B
Scientific paper
In spallation neutron sources, liquid mercury is the subject of big thermal and pressure shocks, upon adsorbing the proton beam. These changes can cause unstable bubbles in the liquid, which can damage the structural material. While there are methods to deal with the pressure shock, the local temperature shock cannot be avoided. In our paper we calculated the work of the critical cluster formation (i.e. for mercury micro-bubbles) together with the rate of their formation (nucleation rate). It is shown that the homogeneous nucleation rates are very low even after adsorbing several proton pulses, therefore the probability of temperature induced homogeneous bubble nucleation is negligible.
Abyzov Alexander S.
Barna Imre Ferenc
Imre Attila Rikard
Schmelzer Jürn W. P.
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