Abstract
In recent years, it has been confirmed that micro bubbles are effective in various industries such as aquaculture and hydroponics. It is expected that the required micro bubble diameter distribution and void fraction of micro bubble water are different in each industry. Therefore, we focused on micro bubble generated by pressurized dissolution method and an experimental study on how micro bubble diameter distribution and void fraction of micro bubble water was affected by a change of a shape of a micro bubble generating nozzle was carried out. One of the important elements that make up the nozzle is clearance part. We conducted experiments using several nozzles with various clearance widths. (clearance widths x = 0.135, 0165, 0.180, 0.210, 0.260, 0.310, 0.365 mm) As a result, we found that changes in the nozzle clearance width affect the micro bubble diameter distribution and void fraction of micro bubble water.
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