Abstract: Heat transfer coefficients between an immersed horizontal tube and an aerated vibrated
fluidized bed are measured. There is a maximum value in the h-G experimental curve. The
heat transfer coefficient increases with decrease in particle diameter in the fully
fluidized region. The particle density has less effect on the heat transfer coefficients.
High amplitude and low frequency, or low amplitude and high frequency are favorable to heat
transfer. Exceedingly high gas velocity is unfavorable to the surface-bed heat transfer. A
model based on the “pocket” theory was proposed for predicting the surface-to-bed heat
transfer coefficients in fully fluidized region. The predictions from the model were
compared with observed data. The reasonable fit suggests the adequacy of the model.

Key words: Vibration heat transfer, vibration fluidization, heat transfer, vibration, fluidization

摘要： Heat transfer coefficients between an immersed horizontal tube and an aerated vibrated
fluidized bed are measured. There is a maximum value in the h-G experimental curve. The
heat transfer coefficient increases with decrease in particle diameter in the fully
fluidized region. The particle density has less effect on the heat transfer coefficients.
High amplitude and low frequency, or low amplitude and high frequency are favorable to heat
transfer. Exceedingly high gas velocity is unfavorable to the surface-bed heat transfer. A
model based on the “pocket” theory was proposed for predicting the surface-to-bed heat
transfer coefficients in fully fluidized region. The predictions from the model were
compared with observed data. The reasonable fit suggests the adequacy of the model.

关键词: Vibration heat transfer;vibration fluidization;heat transfer;vibration;fluidization