GENERATION OF HEAT FLUX NEAR THE CAPILLARY IMMERSED INTO THE CAVITATING LIQUID DUE TO THE EXTERNAL ACOUSTICAL FIELD
DOI:
https://doi.org/10.15673/0453-8307.3/2015.42637Keywords:
Heat flux, Capillary, Ultrasonic cavitation, Phase transitionAbstract
We propose the simple model of the heat flux generation throw the open end of the capillary cannel submersed into liquid, where an ultrasonic field is formed. This model is based on the previous experimental research of the sonic-capillary effect. The peculiarities of them are: the excitation of cavitations strongly under the capillary cannel; the translation motion of cavities to the capillary cannel, recorded by mean of the moving image camera with the velocity of about 160000 frames per second; the local heating of liquid in capillary and temperature distribution in the capillary cannel; the gradient of temperature directed according the translation motion of the cavities. The principal distinction of our model is that the cavitation process is connected with a periodical phase transitions. Due to the directional motion of cavities to the capillary cannel, all thermodynamic processes, connected with extension of cavities and which need some quality of heat are located under the capillary cannel; the decreasing of cavities and the return of heat are located in the capillary cannel. Thus, the result heat flux forms throw the open capillary section. The proposed model is realized as a software and calculated in wide ranges of temperature, diameters of cavities, frequencies of ultrasonic. The density of heat flux was calculated for the conditions of based experiments.
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