Significant advances have recently been made in analytical and computational methods for the prediction of local thermal-hydraulic conditions in gas/liquid two-phase flows. There is, however, a need for extensive experimental data, for the dual purposes of constitutive relation development and code qualification. This is especially true of systems involving complicated geometries and/or extreme flow conditions for which little, if any, applicable information exists in the open literature. For the tests described in the present paper, a novel electrical probe has been applied to measure the void fraction in atmospheric pressure air/water flows, and steam/water mixtures at high temperature and pressure. The data acquired in the latter experiments are compared with the results of a onedimensional two-fluid computational analysis. v KAPL-4747
We determine the minimal number of variables Γ * (d, K) which guarantees a nontrivial solution for every additive form of degree d = 2m, m odd, m ≥ 3 over the six ramified quadratic extensions of Q2. We prove that ifThe case d = 6 was previously known.
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