Two-phase annular flow in vertical pipes: A critical review of current research techniques and progress

Y Xue, C Stewart, D Kelly, D Campbell, M Gormley - Water, 2022 - mdpi.com
Two-phase annular flow in vertical pipes is one of the most common and important flow
regimes in fluid mechanics, particularly in the field of building drainage systems where …

The thermal hydraulic phenomenon in tight lattice bundles: A review

BH Yan - Annals of Nuclear Energy, 2019 - Elsevier
The analysis of thermal hydraulic phenomenon in tight lattice sub-channels is of importance
in pursuing high conversion ratio of Light Water Reactors (LWR). Tight lattice is also a …

A new method for liquid film thickness measurement based on ultrasonic echo resonance technique in gas-liquid flow

M Wang, D Zheng, Y Xu - Measurement, 2019 - Elsevier
Liquid film thickness is an important parameter for gas-liquid two phase flow, and the
measurement methods are significant for studying heat and mass transfer characteristics …

Bubbly drag reduction investigated by time-resolved ultrasonic pulse echography for liquid films cree** inside a turbulent boundary layer

HJ Park, Y Tasaka, Y Murai - Experimental Thermal and Fluid Science, 2019 - Elsevier
Frictional drag reduction due to bubble lubrication was investigated by measuring liquid
films cree** along a wall within a two-phase turbulent boundary layer. We developed …

Numerical investigation of spatial and temporal structure of annular flow with disturbance waves

W Fan, H Li, H Anglart - International Journal of Multiphase Flow, 2019 - Elsevier
Droplet entrainment is a crucial process for annular flow in terms of heat and mass transfer.
Disturbance wave is believed to be a fundamental phenomenon which is closely related to …

Quantification of cavitating flows with neutron imaging

IK Karathanassis, M Heidari-Koochi, F Koukouvinis… - Scientific Reports, 2024 - nature.com
The current experimental investigation demonstrates the capability of neutron imaging to
quantify cavitation, in terms of vapour content, within an orifice of an abruptly constricting …

Development of a fast neutron imaging system for investigating two-phase flows in nuclear thermal–hydraulic phenomena: A status report

R Zboray, R Adams, M Cortesi, HM Prasser - Nuclear Engineering and …, 2014 - Elsevier
The present paper gives an overview of the status of an ongoing project aiming at the
development of a fast neutron imaging system for investigating two-phase flows primarily in …

In-depth analysis of high-speed, cold neutron imaging of air-water two-phase flows

R Zboray, P Trtik - Flow Measurement and Instrumentation, 2019 - Elsevier
We have recently published first results of high frame rate cold neutron radiography of air-
water two-phase flows in a bubbler. We have demonstrated imaging rates up to 800 frames …

Optical flow method for neutron radiography flow diagnostics

T Liu, R Zboray, P Trtik, LP Wang - Physics of Fluids, 2021 - pubs.aip.org
The principle of an optical flow method is formulated for neutron radiography (NR) flow
diagnostics to determine high-resolution velocity fields of two-phase flows. This method is …

High-frame rate imaging of two-phase flow in a thin rectangular channel using fast neutrons

R Zboray, I Mor, V Dangendorf, M Stark… - Applied Radiation and …, 2014 - Elsevier
We have demonstrated the feasibility of performing high-frame-rate, fast neutron
radiography of air–water two-phase flows in a thin channel with rectangular cross section …