Fig. 4: Fast bubble capture and collection in flow environment.
a Experimental setup and working process for bubble capture involve constructing an inner flow channel measuring 290 × 10 × 6 mm, connected to a gas collection section, to facilitate bubble capture measurements in a flow environment. b The optimized MA surface with a conical array structure of b/a = 1.7 and the FH surface, both measuring 130 × 10 × 1.6 mm. c An optical image of the accumulated bubble at the end of the MA surface, with a gas collection tube connected to the immersed volumetric cylinder. d Gas collection setup for an immersed volumetric cylinder. The optical image sequence of gas collection in the immersed volumetric cylinder during a 120 s test. e Optical images display stable continuous gas flow formed on the MA surface recorded after 5 s bubble capture process. f Optical images show separated bubbles captured by the FH surface at varying locations along the surface recorded after 5 s bubble capture process. g Bubble capture rate (captured volume/gas injection volume) on the MA and FH surfaces as a function of Re = ρvde/μ, where v is the flow rate and de is the equivalent diameter of chamber, ranging from 2083 to 5417. The bubble injection rate is 0.017 mL/s. h The collection gas volume under varying bubble injection rate accumulates with time at Re = 2083.
