Abstract
Abstract A water model was adopted to conduct an experimental study on the physical modeling of bubble behaviors and the effects of vessel pressure intensity, nozzle aperture diameter, bottom blowing location and bottom blowing flow rate on bubble properties were analyzed. Experimental results show that with the increase in vessel pressure intensity, the bubble breaking distance is shortened, the size is decreased, the number is increased, the degree of deformation in the rising process becomes smaller, and the fluctuation range of liquid level becomes small; in addition, the diameter of bubbles breaking away from the nozzle decreases. With the increase of bottom blowing aperture diameter, the average diameter of bubbles on the liquid level gets bigger and the number of bubbles decreases; moreover, the size of bubbles breaking away from the nozzle increases, their shape tends to be oval, and the time from bubble formation to bubble breaking is longer. With the increase of bottom blowing flow rate, the bubble breaking distance gets long, the size and number of bubbles increase, the bubble shape tends to be oval, and the impact force on the liquid level becomes larger. The greater the pressure intensity of the vessel, the closer the bottom blowing position is to the center, and the smaller the average diameter of bubbles.
Highlights
A water model was adopted to conduct an experimental study on the physical modeling of bubble behaviors and the effects of vessel pressure intensity, nozzle aperture diameter, bottom blowing location and bottom blowing flow rate on bubble properties were analyzed
With the rise of pressure intensity, the degree of deformation of bubble shape becomes smaller in the rising process, especially the pressure range is between 1.0 and 2.0 MPa; when the bubble departs from the nozzle, it has a rigid spherical shape and becomes a flat oval shape, in which the bubble always keeps in the rising process, with minimized degree of deformation
Under the condition where a single bubble is formed by an extremely small flow rate, the size of the bubble just departing from the nozzle gradually decreases with the increase of vessel pressure, and the bubble shape tends to a rigid ball with the decrease in bubble size
Summary
Abstract: A water model was adopted to conduct an experimental study on the physical modeling of bubble behaviors and the effects of vessel pressure intensity, nozzle aperture diameter, bottom blowing location and bottom blowing flow rate on bubble properties were analyzed. The study on the formation of a single bubble in solid suspension liquid indicates that [20], the pressure intensity has a great effect on the bubble size under the pressure intensity of 0.1–21 MPa. In addition to the liquid viscosity, density, surface tension, and pressure intensity, the gas flow and bottom blowing aperture diameter have a great effect on bubble movement behaviors. This paper adopts a water modeling method to analyze the movement states and change rules of both bubbles on the liquid level and freely rising bubbles in the liquid under high pressure and normal pressure conditions, and study the effects of pressure intensity, bottom blowing flow rate, nozzle aperture diameter and bottom blowing location on the behaviors of gases in the liquid
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