High-resolution two-phase flow measurement techniques for the generation of experimental data for CFD code qualification

Abstract Computational fluid dynamics simulations for two-phase flows are important in different fields of engineering and science. Since two-phase flows are inherently complex, also CFD modeling development requires special attention. The validation of model implementation and the derivation of physics based models for momentum, heat, and mass transfer in two-phase flow require experiments with generation of high-resolution measurement data. This, however, is a great challenge, since most standard flow measurement tools used in single phase flow situations, are not suited for multiphase flows. In this article we report on advanced imaging and measuring methods for two-phase flow experiments, which have been extensively used in the recent past to conduct experiments for two-phase flows at the Helmholtz-Zentrum Dresden-Rossendorf. In particular the application of wire-mesh sensors, ultrafast X-ray tomography, gamma ray tomography and positron emission tomography will be introduced and discussed.

[1]  H. Lemonnier.  Multiphase instrumentation: The keystone of multidimensional multiphase flow modeling , 1997 .

[2]  Th. Frank,et al.  VALIDATION OF CFD MODELS FOR MONO- AND POLYDISPERSE AIR-WATER TWO-PHASE FLOWS IN PIPES , 2008 .

[3]  Annalisa Manera,et al.  The multipurpose thermalhydraulic test facility TOPFLOW: an overview on experimental capabilities, instrumentation and results , 2006 .

[4]  Jiyuan Tu,et al.  Gas-liquid flows , 2009 .

[5]  Barry J. Azzopardi,et al.  Comparative study of gas–oil and gas–water two-phase flow in a vertical pipe , 2010 .

[6]  Barry J. Azzopardi,et al.  Turbulence modification in annular gas/liquid flow , 1999 .

[7]  F. Zimmermann,et al.  High resolution gamma ray tomography scanner for flow measurement and non-destructive testing applications. , 2007, The Review of scientific instruments.

[8]  Yassin A. Hassan,et al.  Large eddy simulation in pebble bed gas cooled core reactors , 2008 .

[9]  Uwe Hampel,et al.  Temperature control design for a high-resolution gamma-ray tomography detector. , 2010, The Review of scientific instruments.

[10]  Horst-Michael Prasser,et al.  Evolution of interfacial area concentration in a vertical air-water flow measured by wire-mesh sensors , 2007 .

[11]  Uwe Hampel,et al.  Void measurement using high-resolution gamma-ray computed tomography , 2011 .

[12]  H. Prasser,et al.  Bubble size measurement using wire-mesh sensors , 2001 .

[13]  Horst-Michael Prasser,et al.  Novel experimental measuring techniques required to provide data for CFD validation , 2008 .

[14]  U. Hampel,et al.  An ultra fast electron beam x-ray tomography scanner , 2008 .

[15]  Barry J. Azzopardi,et al.  The characteristics of gas/liquid flow in large risers at high pressures , 2008 .

[16]  Uwe Hampel,et al.  Design of a modular signal processing board (MSPB) for gamma-ray imaging applications , 2012 .

[17]  Eckhard Krepper,et al.  Modeling the Evolution of Bubbly Flow along a Large Vertical Pipe , 2007 .

[18]  Barry J. Azzopardi,et al.  Wisp-like structures in vertical gas–liquid pipe flow revealed by wire mesh sensor studies , 2010 .

[19]  Uwe Hampel,et al.  Flow imaging by high speed transmission tomography. , 2010, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[20]  Xianfeng Fan,et al.  Positron imaging techniques for process engineering: recent developments at Birmingham , 2008 .

[21]  Annalisa Manera,et al.  Experimental Investigation on Bubble Turbulent Diffusion in a Vertical Large-Diameter Pipe by Wire-Mesh Sensors and Correlation Techniques , 2007 .

[22]  Eckhard Krepper,et al.  Use of models for lift, wall and turbulent dispersion forces acting on bubbles for poly-disperse flows , 2007 .

[23]  Eckhard Krepper,et al.  Evolution of the two-phase flow in a vertical tube—decomposition of gas fraction profiles according to bubble size classes using wire-mesh sensors , 2002 .

[24]  Horst-Michael Prasser,et al.  Counter-current flow limitation in a model of the hot leg of a PWR-Comparison between air/water and steam/water experiments , 2012 .

[25]  Annalisa Manera,et al.  Comparison between wire-mesh sensors and conductive needle-probes for measurements of two-phase flow parameters , 2009 .

[26]  Eckhard Krepper,et al.  The inhomogeneous MUSIG model for the simulation of polydispersed flows , 2008 .

[27]  Horst-Michael Prasser,et al.  Wire-mesh sensors for high-resolving two-phase flow studies at high pressures and temperatures , 2007 .

[28]  H. Prasser,et al.  A new electrode-mesh tomograph for gas–liquid flows , 1998 .

[29]  U. Hampel,et al.  Feasibility study for mega-electron-volt electron beam tomography. , 2012, The Review of scientific instruments.

[30]  Uwe Hampel,et al.  Ultrafast three-dimensional x-ray computed tomography , 2011 .

[31]  Eckhard Krepper,et al.  A population balance approach considering heat and mass transfer—Experiments and CFD simulations , 2011 .

[32]  U. Hampel,et al.  Capacitance wire-mesh sensor for fast measurement of phase fraction distributions , 2007 .

[33]  Uwe Hampel,et al.  Ultrafast X-ray computed tomography for the analysis of gas–solid fluidized beds , 2012 .

[34]  Barry J. Azzopardi,et al.  High-resolution gas–oil two-phase flow visualization with a capacitance wire-mesh sensor , 2010 .

[35]  Eckhard Krepper,et al.  Development of a generalized coalescence and breakup closure for the inhomogeneous MUSIG model , 2011 .

[36]  Uwe Hampel,et al.  Measurement of Fluid Distributions in a Rotating Fluid Coupling Using High Resolution Gamma Ray Tomography , 2008 .

[37]  Uwe Hampel,et al.  Influence of the Lagrangian Integral Time Scale Estimation in the Near Wall Region on Particle Deposition , 2012 .

[38]  H. Allelein,et al.  Simulated accident testing of a fuel element from the HFR-EU1bis irradiation campaign , 2014 .

[39]  Y. Hassan,et al.  Flow visualization in a pebble bed reactor experiment using PIV and refractive index matching techniques , 2008 .

[40]  Frank-Peter Weiss,et al.  Influence of the Pipe Diameter on the Structure of the Gas-Liquid Interface in a Vertical Two-Phase Pipe Flow , 2005 .