TY - JOUR N2 - The image analysis consists in extracting from the information which is available to the observer of the part that is important from the perspective of the investigated process. This process usually accompanies a considerable reduction in the amount of information from the image. In the field of two-phase flows, computer image analysis can be used to determine flow and geometric parameters of flow patterns. This article presents the possibilities of using this method to determine the void fraction, vapor quality, bubble velocity and the geometric dimensions of flow patterns. The use of computer image analysis methods is illustrated by the example of HFE 7100 refrigerant methoxynonafluorobutane condensation in a glass tubular minichannel. The high speed video camera was used for the study, and the films and individual frames received during the study were analyzed. L1 - http://journals.pan.pl/Content/111922/PDF/06_paper.pdf L2 - http://journals.pan.pl/Content/111922 PY - 2019 IS - No 1 EP - 103–114 DO - 10.24425/ather.2019.128292 KW - Condensation KW - Flow structures KW - Image analyze KW - Minichannels A1 - Sikora, Małgorzata A1 - Bohdal, Tadeusz PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences VL - vol. 40 DA - 2019.04.01 T1 - Application of computer image analyzes in the investigation of refrigerants condensation in minichannels SP - 103–114 UR - http://journals.pan.pl/dlibra/publication/edition/111922 T2 - Archives of Thermodynamics ER -