ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
EFFECT OF SYSTEMATIC GROOVED SURFACE ON THE RATE OF HEAT AND MASS TRANSFER IN A FALLING LIQUID FILM
要約
Heat and mass transfer between the wall of a systematic grooved surface pipe and a falling liquid film are studied experimentally. Applying a method of chemical dissolution the mass transfer coefficient /3 is measured. It is higher than that for a smooth surface pipe about 3−4 times.
Heat transfer coefficients are also measured. They are also higher than that for the smooth surface pipe about 2−3 times, and a correlation of similarity numbers is obtained.
By adding trace of surface active agent to distilled water to measure the heat transfer coefficient, a novel phenomenon of "wake Interference" is founds The heat transfer coefficient h is higher than in the case of pure water, and a lateral wave along the groove is observed. A mechanism of wake interference induced by interfacial turbulence is suggested.
Heat transfer coefficients are also measured. They are also higher than that for the smooth surface pipe about 2−3 times, and a correlation of similarity numbers is obtained.
By adding trace of surface active agent to distilled water to measure the heat transfer coefficient, a novel phenomenon of "wake Interference" is founds The heat transfer coefficient h is higher than in the case of pure water, and a lateral wave along the groove is observed. A mechanism of wake interference induced by interfacial turbulence is suggested.