The Results of Numerical Simulation of Two-Phase Liquid/Gas Flow with Constant and Real Thermophysical Properties of the Liquid

In this paper, the authors study the outflow of liquid from a jet nozzle using a commercial software package with varying initial and boundary conditions. Gas-dynamic characteristics and fields of pressure, velocity, temperature and volume fraction of two-phase flow are obtained. A comparison of the results of numerical simulation of liquid outflow from a jet nozzle with constant and temperature dependent thermophysical properties of the liquid phase is performed. The qualitative influence of pressure in the nozzle on the process of jet disintegration is determined. As a result of a series of calculations, the minimum required characteristics of temporal and spatial resolution for this task are identified. It is established that the use of real thermophysical properties of the liquid phase increases jet disintegration due to a decrease in the capillary forces of the liquid with an increase of its temperature. It is determined that with real thermophysical properties, the velocity and temperature lag between the phases decreases, while with constant thermophysical properties it remains the same.

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