International Scientific Journal

Thermal Science - Online First

online first only

Algorithms for determination of the vector velocity field in a two-phase gas-liquid flow

Energy efficiency is a key issue of sustainable development. During the design of industrial devices, it strives to achieve the highest possible energy efficiency. In the industrial systems, two-phase flow is a difficult task, especially the prediction and maintenance of the two-phase flow regime. That is why this research proposes the evaluation and choice of an algorithm that will give a hint of the device design for which the hydrodynamic conditions of the two-phase mixture flow may be evaluated. The tests were carried out in a rectangular vertical narrow channel, as this type of device is in common use. The work aimed to show which algorithm is better for such evaluation. Parameters such as pressure drop, heat, mass, and momentum transfer are influenced by the phase velocity field. Still, various models are used for the determination of the velocity field. Therefore there is a problem of choosing a model that will give the results closest to the real conditions. Flow visualization gives the noninvasive determination of the actual velocity field. An analysis of the velocity field was performed, which showed that for different two-phase flow regimes there are differences for given algorithms. The following algorithms were used to determine the velocity vector field: Adaptive Correlation Method and Adaptive Particle Image Velocity Method were used which are the parts of the general Digital Particle Image Velocimetry. The determination of the velocity fields in the quantitative and qualitative assessment of a given two-phase flow regime was obtained. The result of the research is the evaluation of algorithms for characterization two-phase gas-liquid flow.
PAPER REVISED: 2020-06-03
PAPER ACCEPTED: 2020-06-06
  1. Mantelli, M. B,. Thermosyphon Technology for Industrial Applications, in: Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications, CRC Press, Taylor & Francis Inc., Boca Renton, USA, 2013, pp. 411-464
  2. Pabón, N. Y. L., et al., Visualization and Experimental Analysis of Geyser Boiling Phenomena in Two-Phase Thermosyphons, International Journal of Heat and Mass Transfer, 141 (2019), pp. 876-890
  3. Ligus, G., et al., A New Method of Selecting the Airlift Pump Optimum Efficiency at Low Submergence Ratios with the Use of Image Analysis, Energies, 12 (2019), pp. 1-19
  4. Wasilewski, M., Brar, L. S., Optimization of the Geometry of Cyclone Separators Used in Clinker Burning Process: A Case Study, Powder Technology, 313 (2017), pp. 293-302
  5. Bohdal, T., et al., High Pressure Refrigerants Condensation in Vertical Pipe Minichannels, International Journal of Heat and Mass Transfer, 134 (2019), pp. 1250-1260
  6. Anweiler, S., Ulbrich, R., Flow pattern for different fluidization apparatuses, Inżynieria Chemiczna i Procesowa, 25 (2004), pp. 577-582
  7. Mortazavi, M., Tajiri, K., Two-phase flow pressure drop in flow channels of proton exchange membrane fuel cells: Review of experimental approaches, Renewable & Sustainable Energy Reviews, 45 (2015), pp. 296-317
  8. Radwan, A., et al., Thermal management of concentrator photovoltaic systems using two-phase flow boiling in double-layer microchannel heat sinks, Applied Energy, 241 (2019), pp. 404-419
  9. Xie, J., et al., A comprehensive understanding of enhanced condensation heat transfer using phase separation concept, Energy, 172 (2019), pp. 661-674
  10. Sadek, O., et al., Numerical investigation of the cross flow fluidelastic forces of two-phase flow in tube bundle, Journal of Fluids and Structures, 79 (2018), pp. 171-186
  11. Hetsroni, G, Handbook of multiphase systems, USA, 1982.
  12. Anweiler, S., Development of videogrammetry as a tool for gas-particle fluidization research, Journal of Environmental Management, 203 (2017), pp. 942-949
  13. Anweiler, S., Masiukiewicz, M., Application of stereology for two-phase flow structure validation in fluidized bed reactors, Thermal Science, 20 (2016), pp. 1199-1208
  14. Adrian R. J., Westerweel J., Particle Image Velocimetry, Cambridge University Press, New York, 2011.
  15. Ke, S., et al., Aerodynamic performance and wind-induced effect of large-scale wind turbine system under yaw and wind-rain combination action, Renewable Energy, 136 (2019), pp 235-253
  16. Ludwig, W., et al., Analysis of pneumatic nozzle operation with the stochastic Euler-Lagrange model, Chemical Engineering Science, 197 (2019), pp. 386-403
  17. Yazdi, S.G., et al., A Novel Fabrication Method for Compliant Silicone Phantoms of Arterial Geometry for Use in Particle Image Velocimetry of Haemodynamics, Applied Sciences 9 (2019), pp. 1-12
  18. Wasilewski M., et al., Experimental and numerical investigation on the performance of square cyclones with different vortex finder configurations, Separation and Purification Technology, 239 (2020), pp. 116588
  19. Hutli, E., et al., Experimental and numerical investigation of coolant mixing in a model of reactor pressure vessel down-comer and in cold leg inlets, Thermal Science, 21 (2017), pp. 1491-1502
  20. (access: 11-09-2019)
  21. (access: 11-09-2019)
  22. (access: 11-09-2019)
  23. Wilmarth, T., Ishii, M., Two-phase flow regimes in narrow rectangular vertical and horizontal channels. International Journal of Heat and Mass Transftransfer, 37 (1994), pp. 1749-1758
  24. Taitel, Y. , et al., Modelling flow pattern transitions for steady upward gas‐liquid flow in vertical tubes. AIChE Journal, 26 (1980), pp. 345-354
  25. Kaichiro, M.; Ishii, M. Flow regime transition criteria for upward two-phase flow in vertical tubes. International Journal of Heat and Mass Transftransfer, 27 (1984), pp. 723-737