The aim of present study is a computer simulation (using MATLAB Simulink^® program) of the process of milk outflow from a cow’s teat based on the developed mathematic model. The milk stream diameter was assumed in range between 3 mm to 0.7 mm for constant pressure parameter in teat P_w and vacuum under liner P_d. In defining the vacuum in the model it was used it’s typical values in machine cow milking: 33.3 and 50.7 kPa. The result of simulation research of this proces shown that time of milk outflow from teat rise as milk stream is decreasing. Results of the research are illustrated on graphs.

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