Study on viscosity reduction of crude oil by ultrasonic cavitation based on calorimetry

In this work, the temperature of each point in the reaction vessel was determined by calorimetry. The data were processed by software to plot the distribution of the temperature field in the horizontal and vertical directions. Then, the effects of ultrasonic power and probe immersion depth on the distribution of the temperature field and the position and shape of the focal domain are discussed in detail. The results show that the distribution of the temperature field in the horizontal direction is in accordance with the acoustic decay law. In the vertical direction, due to the existence of standing waves, the distribution of the temperature field does not conform to the decay law of ultrasound but is rather more in line with the "S" function. The focal field position is not affected by the power and immersion depth, and the focal field range increases with the increase of power, the shape also changes from elliptical, circular to teardrop shape.