Two-phase flow model for energetic proton beam induced pressure waves in mercury target systems in the planned European Spallation Source |
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Authors: | I F Barna A R Imre L Rosta F Mezei |
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Institution: | (1) KFKI Atomic Energy Research Institute (AEKI) of the Hungarian Academy of Sciences, P.O. Box 49, 1525 Budapest, Hungary;(2) Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, P.O. Box 49, 1525 Budapest, Hungary |
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Abstract: | Two-phase flow calculations are presented to investigate the thermo-hydraulical effects
of the interaction between 2 ms long 1.3 GeV proton pulses with a closed mercury loop which
can be considered as a model system of the target of the planned European Spallation
Source (ESS) facility. The two-fluid model consists of six first-order partial
differential equations that present one dimensional mass, momentum and
energy balances for mercury vapor and liquid phases are capable
to describe quick transients like cavitation effects or shock waves. The absorption of the proton beam is represented as instantaneous
heat source in the energy balance equations.
Densities and internal energies of the mercury liquid-vapor system is calculated from the van der Waals equation, but general
method how to obtain such properties using arbitrary equation of state is also presented.
A second order accurate high-resolution shock-capturing numerical scheme
is applied with different kind of limiters in the numerical calculations.
Our analysis show that even 75 degree temperature heat shocks cannot cause considerable cavitation effects in mercury. |
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Keywords: | PACS" target="_blank">PACS 47 55 Kf Particle-laden flows 47 90 a+ Other topics in fluid dynamics 47 55 dp Cavitation and boiling |
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