Experimental databases on two-phase vertical pipe flows with and without phase transfer obtained at the TOPFLOW-DN200 test section

A comprehensive CFD-grade database on two-phase vertical pipe flow was established during the last years. The experiments were done at the test section "Variable Gas Injection" which is part of the TOPFLOW facility. Data are available on adiabatic air-water flows, condensing steam-water flows and boiling flows. In case of condensing flow steam was injected into sub-cooled water, while boiling was obtained by pressure relief. The measurements and the available databases are presented.