[A method of studying characteristics during modeling of blood flow in stenosed vessels]. / Metod issledovaniia kharakteristik pri modelirovanii techeniia krovi v stenozirovannykh sosudakh.

A new method of visualization employed in experimental hydrodynamics, namely a method of photochromic visualization (PCV), was used to examine the fluid flow in a tube with a diaphragm. The PCV is based on the design of colour markers in a model physiological solution exposed to laser radiation for 10(-6) to 10(-9) s. For the model flow in a tube with transitory Re numbers both qualitative and quantitative data were obtained. A round tube with a central hole in it and a diaphragm was chosen as an experimental stenosed vessel. The structure of the flow beyond the diaphragm was determined, with diameters of the central hole and Re numbers varying. It has been established that the level of tangential stresses increases as the diameter of the central hole in the diaphragm is diminished. It has been shown as well that the structure of the flow beyond the diaphragm undergoes alterations, provided medicamentous additions are introduced into the model physiological solution.