Large amplitude waves in a slug tracking scheme

Abstract

Large amplitude roll waves are incorporated into a previously developed slug tracking scheme for two phase gas-liquid pipe flow. The applicability of the tracking scheme to large amplitude waves is demonstrated with a simplified model for the waves. The waves are modelled analogous to slugs on a moving grid with corresponding wave velocities and a pressure variation determined using an orifice type relation. Slugs and waves in the tracking scheme are separated by regions of stratified flow, which are modelled on a stationary grid using the two-fluid model. The computational scheme is described, compared to experimental data on roll waves, and some wave dynamics such as waves developing to slugs and slugs decaying to waves are demonstrated.

Measurement of theβ-asymmetry parameter ofCu67in search for tensor-type currents in the weak interaction

“…Holstein also provided expressions for the Coulomb corrections to the spectral functions, which are noted as ∆F [52]. Furthermore, including the radiative corrections (∆R 2 and ∆R 3 ) as defined by Yokoo and Morita [53], the β-asymmetry parameter can be written as [54]:…”

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“…[29,30]) we estimate b/Ac = 4.6 ± 2.7 and d/Ac = ±(1.2 ± 1.2) with A here being the mass of the nucleus and c the GT form factor [28]. One then calculates a recoil correction of −0.0041 (30) which leads to A = -0.994 ± 0.010(stat) ± 0.010(syst). weighted average -0.990 (10) Being in agreement with the Standard Model value A β − SM = −1 this result can now be used to constrain physics beyond.…”

“…Further, from systematics (see e.g. [29,30]) we estimate b/Ac = 4.6 ± 2.7 and d/Ac = ±(1.2 ± 1.2) with A here being the mass of the nucleus and c the GT form factor [28]. One then calculates a recoil correction of −0.0041 (30) which leads to A = -0.994 ± 0.010(stat) ± 0.010(syst).…”

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“…radiative corrections, are well understood and can be calculated to good precision, weak magnetism has until now only been studied for a number of low-mass (i.e. up to A = 30) isotopes [73] and additional information is more than welcome. As the weak magnetism term is proportional to E β , transitions with high endpoint energy are preferred.…”